MIT-HOL kerdes [0455]: CR-39 muanyagrol informacio

1999. Dec. 9., Cs, 13:39:00 CET

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At 11:40 1999.12.09. +0100, you wrote:
>lett kidolgozva. Jelenleg muanyag
>lencse alapanyagaul szolgal. Vegy
>osszetetele,keplete,polimerizaciojanak folyamata erdekel. O=
sszetevoit
Nouryset es Perkadox IPP N10 neven az Akzo Nobel gyartja. Ezzel kapcso=
latos
nyilt
>informaciok erdekelnek.

Tisztelt Erdeklodonk,
az On altal keresett Allyl Diglycol Carbonate (CR-39)-rol szolo
irodalomjegyzeket a melleket file-ban megkuldjuk. A forras a Chemical
Abstr. 13. coll. index volt.

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Content-Disposition: attachment; filename="Allyl2.txt"

120:9060
Analysis of allyl diglycol carbonate CR-39 polymerization by laser
Raman spectroscopy.
Yonemori, Shigeaki; Masui, Akio; Noshiro, Makoto (Res. Cent., Asahi
Glass Co. Ltd., Yokohama 221, Japan).  J. Appl. Polym. Sci.:  Appl.
Polym. Symp., 52(Polymer Analysis and Characterization V.), 277-83
(English) 1993.  CODEN: JPSSDD.  ISSN: 0271-9460.  DOCUMENT
TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers)
Section cross-reference(s): 37
The polymn. process of CR-39 allyl diglycol carbonate was investigated
from a viewpoint of the residual amt. of allyl groups and the chem.
decompn. behavior of an initiator.  The progress of polymn. along a
curing temp. curve at 40-90=B0 for 24 h was obsd. using laser Raman
spectroscopy.  The residual amt. of allyl groups in the polymers
decreased to ca. 7% of the inital amt. of the CR-39 monomer.  In the
first half region of the curing process, the amt. of decreased allyl groups
corresponded well to the amt. calcd. from the initiator decompn.  In the
latter half, the polymn. proceeded gradually and CO2 gas derived from
the diisopropyl peroxydicarbonate initiator was accumulated in the
polymer.

Keywords

allyl diglycol carbonate polymn Raman
CR 39 polymn curing Raman
diisopropyl peroxydicarbonate catalyst decompn Raman

Index Entries

Raman spectra
of allyl diglycol carbonate during polymn. and subsequent curing
Thermal decomposition
of diisopropyl peroxydicarbonate initiator, during polymn. of allyl
diglycol carbonate, laser Raman spectroscopic anal. of
Functional groups
allyl, residual, detn. of, during polymn. of allyl diglycol carbonate,
by laser Raman spectroscopy
Polymerization catalysts
thermal, diisopropyl peroxydicarbonate, for allyl diglycol
carbonate, decompn. behavior of, laser Raman
spectroscopic anal. of
Crosslinking
thermal, of allyl diglycol carbonate homopolymer, laser Raman
spectroscopic anal. of
Polymerization
thermal, of allyl diglycol carbonate, laser Raman spectroscopic
anal. of
105-64-6
catalyst, for polymn. of allyl diglycol carbonate, decompn.
behavior of, laser Raman spectroscopic anal. of
25656-90-0
curing of, laser Raman spectroscopic anal. of
124-38-9, preparation
formation of, during thermal decompn. of diisopropyl
peroxydicarbonate initiator used for polymn. of allyl
diglycol carbonate, laser Raman spectroscopic anal. of
142-22-3
polymn. of, laser Raman spectroscopic anal. of

124:233891
Interpenetrating polymer networks of poly(allyl diglycol carbonate)
and polyurethane: effect of composition and crosslink density on
morphology and mechanical properties.
Dadbin, Susan; Burford, R. P.; Chaplin, R. P. (Dep. Polymer Sci., Univ.
New South Wales, Sydney 2052, Australia).  Polymer, 37(5), 785-92
(English) 1996. CODEN: POLMAG.  ISSN: 0032-3861.  DOCUMENT
TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing)
Simultaneous interpenetrating polymer networks (SINs) of poly(allyl
diglycol carbonate) (ADC) and a polyurethane (PU) were synthesized.
The effects of the network compn. and the crosslink d. of the PU phase
on the morphol., mech. properties and thermal transition behavior of the
PU/ADC SIN were studied.  At 10% compn., dynamic mech. anal.
revealed complete phase miscibility.  As the PU content increased,
although phase sepn. occurred, the samples retained their optical
transparency.  Modulus and tensile strength decreased, while
elongation increased, as the PU content increased.  At 30% PU
content, transmission electron micrograph studies revealed a
co-continuous phase morphol., and the domain sizes increased as the
PU crosslink d. increased.  Modulus, tensile strength and fracture
toughness also increased with increasing crosslink d.

Keywords

polyallyl diglycol carbonate interpenetrating network property
polyurethane interpenetrating network morphol mech property
crosslink density polyurethane interpenetrating network

Index Entries

Interpenetrating polymer networks
compn. and crosslink d. effect on morphol. and mech. properties of
interpenetrating polymer networks of poly(allyl diglycol
carbonate) and polyurethane
Polymer morphology
interpenetrating network, compn. and crosslink d. effect on
morphol. and mech. properties of interpenetrating polymer
networks of poly(allyl diglycol carbonate) and
polyurethane
Urethane polymers, preparation
polyester-, compn. and crosslink d. effect on morphol. and mech.
properties of interpenetrating polymer networks of poly(allyl
diglycol carbonate) and polyurethane
25656-90-0
175032-67-4
compn. and crosslink d. effect on morphol. and mech. properties of
interpenetrating polymer networks of poly(allyl diglycol
carbonate) and polyurethane

122:315292
Thermal studies on unirradiated and g-irradiated polymer of allyl
diglycol carbonate.
Kalsi, P. C.; Singh Mudher, K. D.; Pandey, A. K.; Iyer, R. H.
(Radiochemistry Division, Bhabha Atomic Research Centre, Trombay
Bombay-400, India).  Thermochim. Acta, 254, 331-6 (English) 1995.
CODEN: THACAS.  ISSN: 0040-6031.  DOCUMENT TYPE: Journal
CA Section: 35 (Chemistry of Synthetic High Polymers) Section
cross-reference(s): 37
The thermal decompn. of unirradiated and g-irradiated (5.93-15.5
MRad dose range) allyl diglycol carbonate polymer (CR-39) was
studied by thermogravimetry (TG) and DTA (DTA).  These studies
indicate four main decompn. steps in CR-39 polymer in air.
Assessment of the influence of radiation dose on the above range
shows that while the 5.93 MRad g-irradiated polymer CR-39 degrades
in three steps, the 15.5 MRad g-irradiated polymer degrades in only 2
steps.  The kinetics of the different stages of degrdn. were also
evaluated from the TG curves.  Irradn. enhances the decompn. rate and
the effect increases further with increasing radiation dose.  The
activation energy values calcd. for all the decompn. stages decrease
on irradn.

Keywords

thermal study irradiated polyallyl carbonate
allyl diglycol carbonate polymer degrdn
kinetics degrdn polyallyl diglycol carbonate
irradn decompn rate carbonate polymer
activation energy degrdn carbonate polymer

Index Entries

Gamma ray
thermal decompn. and kinetics of degrdn. of unirradiated and
g-irradiated allyl diglycol carbonate polymer
Kinetics of polymer degradation
Polymer degradation
radiochem., thermal decompn. and kinetics of degrdn. of
unirradiated and g-irradiated allyl diglycol carbonate
polymer
25656-90-0
thermal decompn. and kinetics of degrdn. of unirradiated and
g-irradiated allyl diglycol carbonate polymer

118:200780
Comparative characteristics of different types of poly(allyl diglycol)
carbonate.
Golovchenko, A. N.; Dzholos, L. V.; Tret'yakov, S. P. (Ob'edin. Inst. Yad.
Issled., Russia).  Nukleonika, 35(10-12), 315-25 (Russian) 1990.
CODEN: NUKLAS.  ISSN: 0029-5922.  DOCUMENT TYPE: Journal
CA Section: 71 (Nuclear Technology)
Anal. of the response properties of poly(allyl diglycol)carbonate dielec.
track detectors manufd. in England, Hungary, and Germany was carried
out.  The influence of etchant concn. and temp on the etch rate was
investigated.  The etch rate ratio; established in the alpha particle
range between 2.9 and 7.3 MeV, was used for obtaining the
dependences V(REL) and V(Area).  The detector produced in Hungary
possesses the best resoln.

Keywords

polyallyldiglycol carbonate track detector
radiation track detector dielec material
alpha emitter radium 226 track detector

Index Entries

Etching
of poly(allyl diglycol) carbonate dielec. track detectors in sodium
hydroxide soln.
Radiation counters and detectors
poly(allyl diglycol) carbonate dielec., comparative characteristics
of different types of
13982-63-3, uses
alpha-particle emitter, comparative characteristics of different types
of poly(allyl diglycol) carbonate dielec. track detectors for
1310-73-2, uses
etchant, for poly(allyl diglycol) carbonate dielec. track detectors
25656-90-0
radiation track detectors, comparative characteristics of various
types of

123:288065
The failure of optical polymers.
Pittolo, M.; Truss, R.; Frounchi, M.; Chaplin, R. (Research Centre,
SOLA International Holdings Ltd., Lonsdale 5160, Australia).  Mater.
Forum, 19, 201-8 (English) 1995.  CODEN: MFOREM.  ISSN:
0883-2900.  DOCUMENT TYPE: Journal CA Section: 37 (Plastics
Manufacture and Processing)
The fracture toughness of poly(allyl diglycol carbonate) (ADC) resin in
flat sheets and in lens form was measured using a fracture mechanics
approach.  Good correlation and reproducibility has bee obtained.
Interpenetrating polymer networks (IPNs) of ADC and polyurethane
acrylates were synthesized and were shown to improve dramatically the
fracture toughness of the ADC resin, provided strict conditions on the
nature of the urethane acrylate were adhered to.

Keywords

polyallyl diglycol carbonate optical failure
interpenetrating polymer network optical polymer
polyurethane acrylate interpenetrating polymer network

Index Entries

Optical materials
Polymer morphology
failure of optical poly(allyl diglycol carbonate) polymers
Interpenetrating polymer networks
mech. properties of poly(allyl diglycol carbonate)-polyurethane
acrylate interpenetrating networks
Urethane polymers, properties
acrylic, mech. properties of poly(allyl diglycol
carbonate)-polyurethane acrylate interpenetrating
networks
25656-90-0
failure of optical poly(allyl diglycol carbonate) polymers

122:240981
Effect of kinetics on morphology and mechanical properties of
poly(allyl diglycol carbonate)-poly(urethane) interpenetrating
polymer networks.
Dadbin, Susan; Burford, R. P.; Chaplin, R. P. (Sch. Chem. Eng., Univ.
New South Wales, Kensington 2033, Australia).  Polym. Gels
Networks, 3(2), 179-95 (English) 1995.  CODEN: PGNEEI.  ISSN:
0966-7822.  DOCUMENT TYPE: Journal CA Section: 36 (Physical
Properties of Synthetic High Polymers) Section cross-reference(s): 35
Simultaneous interpenetrating polymer networks of poly(allyl diglycol
carbonate) (ADC) and polyurethane were prepd. by differing modes of
synthesis.  The kinetics of the network formation of each constituent
component was investigated by gel time studies and IR spectroscopy.
The effect of different rates of network formation of each component on
the morphol. and mech. properties were studied by TEM and SEM,
dynamic mech. anal. (DMA), stress-strain, and single edge notch
tension.  TEM and DMA studies showed a two-phase sepd. morphol.
The extent of phase sepn. was dependent on the relative rate of
formation of component networks.  Thus, simultaneous gelation of both
networks showed a fine morphol. and exhibited improved toughness
over neat ADC resin.

Keywords

polyurethane simultaneous interpenetrating network morphol
polyallyl diglycol carbonate interpenetrating network

Index Entries

Kinetics of polymerization
Polymer morphology
Rubber, urethane, properties
effect of polymn. kinetics on morphol. and mech. properties of
poly(allyl diglycol carbonate)-urethane rubber
interpenetrating networks
Chains, chemical
interpenetrating, effect of polymn. kinetics on morphol. and mech.
properties of poly(allyl diglycol carbonate)-urethane
rubber interpenetrating networks
25322-69-4, diol and triol derivs., polymers with diisocyanates
25656-90-0
effect of polymn. kinetics on morphol. and mech. properties of
poly(allyl diglycol carbonate)-urethane rubber
interpenetrating networks

122:189033
Silica nano-composites of allyl diglycol carbonate resin.
Frounchi, M.; Burford, R. P.; Chaplin, R. P. (Department Polymer
Science, University New South Wales, Kensington NSW 2033,
Australia).  Polym. Polym. Compos., 2(2), 77-82 (English) 1994.
CODEN: PPOCEC.  ISSN: 0967-3911.  DOCUMENT TYPE: Journal
CA Section: 37 (Plastics Manufacture and Processing)
Nano-sized silica particles were used for improving the fracture
toughness of poly(allyl diglycol carbonate) (ADC) resin composites.
Transmission electron microscopy studies revealed relatively uniform
dispersion of silica particles in the resin.  Dynamic mech. anal.
measurements indicated that an increase in the glass transition temp.
of the ADC resin was accompanied by a higher flexural modulus.  A
small but significant increase in the fracture toughness of the
composites was also obsd.  The fracture surfaces studied by SEM did
not reveal silica particles even at high magnification and appeared to
be featureless smooth surfaces.

Keywords

allyl diglycol carbonate silica composite
nanoparticle silica composite resin

Index Entries

Toughness
fracture, silica nanoparticles in poly(allyl diglycol carbonate)
resin composites with improved fracture toughness
7631-86-9, uses
25656-90-0
silica nanoparticles in poly(allyl diglycol carbonate) resin
composites with improved fracture toughness

121:302373
Effects of pre-soaking on CR-39 plastic and its hydrolysis products.
Ando, Masanobu; Sekine, Hiroshi; Hattori, Takeo; Ogura, Koichi (Coll.
Ind. Technol., Nihon Univ., Narashino 275, Japan).  Nihon Daigaku
Seisankogakubu Kenkyu Hokoku, A:  Rikokei, 26(2), 57-64 (Japanese)
1993.  CODEN: NDAREH.  DOCUMENT TYPE: Journal CA Section:
38 (Plastics Fabrication and Uses) Section cross-reference(s): 74
The effect of presoaking of ion-irradiated CR-39 (polymd. allyl diglycol
carbonates) in hot water and hexachlorobutadiene on its etching
characteristics and sensitivity was investigated, and its hydrolysis
products were analyzed by gas chromatog.  CR-39 specimens were
ion-irradiated and presoaked prior to being etched in a KOH soln., and
the effect of presoaking time on their bulk etch rate was measured and
their sensitivity was detd. based on their REL (restricted energy loss).
The results showed that presoaking of CR-39 in hot water increased its
sensitivity and promoted its hydrolysis, whereas presoaking in
hexachlorobutadiene increased or decreased its sensitivity when its
REL is high or low, resp.  The mechanism of presoaking and etching of
CR-39 was also discussed.

Keywords

presoaking allyl resin alkali etching
hot water presoaking allyl resin etching
hexachlorobutadiene presoaking allyl resin alkali etching
hydrolysis allyl diglycol carbonate resin etching

Index Entries

Etching
presoaking of allyl diglycol carbonate plastics in hot water and
hexachlorobutadiene to promote alkali etching
Polymer degradation
hydrolytic, presoaking of allyl diglycol carbonate plastics in hot
water and hexachlorobutadiene to promote alkali etching
87-68-3
1310-58-3, uses
7732-18-5, uses
25656-90-0
presoaking of allyl diglycol carbonate plastics in hot water and
hexachlorobutadiene to promote alkali etching

116:84551
Relaxational behavior of CR-39 polycarbonate used as nuclear track
detector.
Vanderschueren, J.; Yianakopoulos, G.; Niezette, J.; Chatry, C.; Gasiot,
J. (Dep. Chim. Macromol. Chim. Phys., Univ. Liege, Liege, Belg.).  J.
Appl. Polym. Sci., 44(6), 1027-42 (English) 1992.  CODEN: JAPNAB.
ISSN: 0021-8995.  DOCUMENT TYPE: Journal CA Section: 36
(Physical Properties of Synthetic High Polymers) Section
cross-reference(s): 37, 38, 70, 71
The relaxational behavior of CR-39 [poly(allyl diglycol carbonate)]
nuclear track detectors was detd. at -100 to +125=B0, including the glassy,
glass transition, and ionic conduction regions, by dynamic mech. and
dielec. measurements, DSC, linear coeff. of expansion, and esp.
thermally stimulated current methods owing to their high sensitivity and
resolving power.  Possible correlations between dosimetric
performances, polymer morphol., and intrinsic or extrinsic relaxations
were studied.  Six distinct relaxation regions were evidenced, most of
which were to some extent dependent on the sample investigated and
its thermal history.  From higher to lower temps. these various
relaxations were ascribed to charge carrier migration over
macroscopic distances, glass transition (Tg), nonequil. precursor
motions of Tg, and local mode motions of the diethylene-glycol
dicarbonate links, diethylene glycol segments, and carbonate groups.
In addn. to these intrinsic relaxations, the as-received samples were
also characterized by small-scale residual stresses that relaxed out
irreversibly at temps. <Tg.  The systematic study of the influence
exercized by the position of a specimen in a given sheet, and, for a
given sample, by annealing, thermal cycling, and phys. aging on
relaxation properties showed that, besides spatially inhomogeneous
internal stresses, crosslinking d., and cluster morphol., marked
structural modifications and nonequil. processes could occur by heating
the polymer above Tg.

Keywords

polycarbonate relaxation nuclear track detector

Index Entries

Dielectric loss
Electric conductivity and conduction
Glass temperature and transition
Mechanical loss
Viscoelasticity
of poly(allyl diglycol carbonate) as nuclear track detector, thermal
history effect on, relaxations in relation to
Chains, chemical
relaxation of, of poly(allyl diglycol carbonate), as nuclear track
detector
Electric current
thermally stimulated, of poly(allyl diglycol carbonate) as nuclear
track detector, thermal history effect on, relaxations in
relation to
Radiation counters and detectors
track, poly(allyl diglycol carbonate) for, relaxational behavior of
25656-90-0
relaxational behavior of CR-39, as nuclear track detector

125:249263
Indentation size effect of thermoset polymer: allyl diglycol carbonate
(CR-39).
Yang, Fuqian; Zhou, J. Yiyang; Kordonski, V.; Jacobs, S. D. (Center for
Optics Manufacturing, Univ. of Rochester, Rochester, NY 14623, USA).
J. Mater. Sci. Lett., 15(17), 1523-1525 (English) 1996.  CODEN:
JMSLD5.  ISSN: 0261-8028.  DOCUMENT TYPE: Journal CA Section:
37 (Plastics Manufacture and Processing)
The effect of indentation size on the Knoop microhardness of poly(allyl
diglycol carbonate) (CR 39) was studied.  The inverse indentation size
effect was obsd., which may be explained by assuming that a soft layer
exists at the surface of the polymer.  The hardness reaches a const.
value of 150 MPa for indentation loads larger that s g.

Keywords

polyallyl diglycol carbonate indentation size
microhardness polyallyl diglycol carbonate indentation

Index Entries

Hardness
micro-, effect of indentation size on microhardness of thermoset
poly(allyl diglycol carbonate)
25656-90-0
effect of indentation size on microhardness of thermoset poly(allyl
diglycol carbonate)

124:354645
Response of different poly(ally diglycol carbonate) materials to alpha
particles.
Espinosa, G.; Gammage, R. B.; Meyer, K. E. (Instituto de Fisica,
UNAM, Mexico City 01000, Mex.).  Radiat. Meas., 26(2), 173-177
(English) 1996.  CODEN: RMEAEP.  ISSN: 1350-4487.  DOCUMENT
TYPE: Journal CA Section: 71 (Nuclear Technology)
Poly(allyl diglycol carbonate) (PADC) is the material most commonly
used as an integrating passive track detector.  Several manufacturers
offer PADC material of varying quality.  Results are presented for
comparativeresponse to a range of alpha particle energies and
variable etching conditions.  Seven different types of PADC from three
suppliers were evaluated.  For each type of PADC material, three
different sheets were sampled.  Each sheet was cut, codified, and
handled in the same way for each set of alpha exposure and etching
conditions.  The sensitivity to different alpha particle energies, av.
background, efficiency of alpha particle registration, and linearity of
response were compared.  The potential was demonstrated for making
in-situ field measurements of plutonium contaminated soils at the 10
pCi/g level.

Keywords

integrating passive track detector alpha particle
PADC alpha particle detector
radiation detector PADC track alpha particle
plastic PADC track alpha particle detector
etching plastic PADC alpha particle detector
polyally diglycol carbonate alpha particle detector

Index Entries

Etching
response of different poly(allyl diglycol carbonate) materials to
alpha particles in relation to
Radiation counters and detectors
alpha-particle, track, response of different poly(allyl diglycol
carbonate) materials to alpha particles
1310-58-3, uses
25656-90-0
response of different poly(allyl diglycol carbonate) materials to
alpha particles

116:12238
Response and background study of various PADC materials.
Azimi-Garakani, D.; Wernli, C. (Radiat. Hyg. Div., Paul Scherrer Inst.,
Villigen CH-5232, Switz.).  Nucl. Tracks Radiat. Meas., 19(1-4), 445-8
(English) 1991.  CODEN: NTRMDS.  ISSN: 0735-245X.  DOCUMENT
TYPE: Journal CA Section: 71 (Nuclear Technology)
The results of response and background study of poly(allyl diglycol
carbonate) (PADC) are presented.  The com. available polymeric
detectors supplied by 5 different manufacturers were used.  For each
type/thickness of material, 2 or 3 sheets were sampled.  Each sheet
divided into 6 equal areas and from each, 3 or 4 background and 2
sensitivity detectors were taken and the total of 512 samples were
tested.  The sensitivity was detd. for normally incident bare 252Cf n.  The
highest sensitivity of 0.2 cm-2.mSv-1 with the lowest av. background of
~150 mSv for a single sheet was found.  The min. detectable dose
equiv. (3 std. deviations) obtained was 153 mSv.

Keywords

neutron dosimeter polyallyl diglycol carbonate
detector neutron polyallyl diglycol carbonate
CR39 neutron dosimeter

Index Entries

Dosimeters
Radiation counters and detectors
neutron, poly(allyl diglycol carbonate) materials for, comparison
from different manufs.
12586-31-1
dosimeters, neutron, poly(allyl diglycol carbonate) materials for,
comparison from different manufs.
25656-90-0
neutron dosimeters, comparison from various manufs.
12586-31-1
radiation counters and detectors, neutron, poly(allyl diglycol
carbonate) materials for, comparison from different
manufs.

122:161626
Thermal studies on unirradiated and gamma-irradiated polymer of allyl
diglycol carbonate.
Kalsi, P. C.; Mudher, K. D. Singh; Pandey, A. K.; Iyer, R. H.
(Radiochemistry Division, B.A.R.C., Bombay 400 085, India).  Proc.
Natl. Symp. Therm. Anal., 9th, 201-3.  Edited by: Ravindran, P. V.
Indian Therm. Anal. Soc.: Bombay, India. (English) 1993.  CODEN:
60IMAI.  DOCUMENT TYPE: Conference CA Section: 35 (Chemistry of
Synthetic High Polymers)
Gamma irradn. of diethylene glycol bis(allyl carbonate) homopolymer
(CR 39) decreases the activation energy for thermal degrdn. but does
not change the mechanism.

Keywords

diethylene glycol allyl carbonate homopolymer
kinetics degrdn allyl diglycol carbonate

Index Entries

Gamma ray
gamma irradn. effect on thermal degrdn. kinetics of diethylene
glycol bis(allyl carbonate) homopolymer
Kinetics of polymer degradation
thermal, gamma irradn. effect on thermal degrdn. kinetics of
diethylene glycol bis(allyl carbonate) homopolymer
25656-90-0
CR 39; gamma irradn. effect on thermal degrdn. kinetics of
diethylene glycol bis(allyl carbonate) homopolymer

120:193138
Mechanical and fracture properties of diethylene glycol bis(allyl
carbonate) resins.
Frounchi, M.; Chaplin, R. P.; Burford, R. P. (Dep. Polym. Sci., Univ.
New South Wales, Kensington 2033, Australia).  Polymer, 35(4), 752-7
(English) 1994.  CODEN: POLMAG.  ISSN: 0032-3861.  DOCUMENT
TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing)
Mech. properties and fracture tests were conducted on the thermoset
diethylene glycol bis(allyl carbonate) resins.  Both yield stress, sy, and
Young's flexure modulus increase as the testing rate increases.  Crack
propagation, which is unstable (stick-slip) at a low loading rate,
changes to stable propagation as the loading rate is raised.  Linear
elastic fracture mechanics concepts were employed to analyze the
stress intensity factors vs. sy.  The stick-slip behavior is suggested to
be due to blunting of the crack, which is controlled by the yield behavior
of the resin.  A crit. stress of the order of 5 times sy must be achieved at
a crit. distance ahead of the crack tip.  Fracture surfaces were analyzed
using SEM and optical microscopy.  No indication of crazing was
detected.

Keywords

diethylene glycol bisallyl carbonate resin
mech allyl diglycol carbonate resin
fracture allyl diglycol carbonate resin

Index Entries

Viscoelasticity
dynamic, of diethylene glycol bis(allyl carbonate) resins
Polymer morphology
fracture-surface, of diethylene glycol bis(allyl carbonate) resins,
mech. behavior in relation to
25656-90-0
mech. and fracture properties of

120:144979
Surface damage caused by single, low-energy, high-charge-state ions.
Schmieder, Robert W.; Bastasz, Robert (Sandia Natl. Lab., Livermore,
CA 94551-0969, USA).  AIP Conf. Proc., 274(VIth International
Conference on the Physics of Highly Charged Ions, 1992), 690-4
(English) 1993.  CODEN: APCPCS.  ISSN: 0094-243X.  DOCUMENT
TYPE: Journal CA Section: 66 (Surface Chemistry and Colloids)
Section cross-reference(s): 36
Individual damage sites on the surface of a solid polymer (CR-39),
produced by the impact of Xe44+ ions at low kinetic energy, were obsd.
with SEM.  The sites were enlarged to about 0.2 mm diam. by etching,
and were identical for fixed ion charge state and kinetic energy.  Model
calcn. indicate that the ion/solid interaction is strongly affected by the
potential energy carried by the ions.  These observations lead the
authors to suggest that low-energy, high-charge-state ions could
provide a new tool for fabrication of nanometer-sized structures.

Keywords

etch pit surface structure polymer
xenon ion impact surface damage polymer

Index Entries

Surface structure
damaged, of allyl diglycol carbonate polymer, by impact of xenon
(44+) ions
70478-74-9, properties
surface damage to allyl diglycol carbonate polymer by impact of
25656-90-0
surface damage to, by impact of xenon (44+) ions

117:59003
Holographic material imageable by long wavelength laser beam.
Ichihashi, Taichi; Tanigawa, Hideo; Nagata, Akira (Agency of Industrial
Sciences and Technology, Japan).  Jpn. Kokai Tokkyo Koho JP
03249685 A2 7 Nov 1991 Heisei, 3 pp. (Japan).  CODEN: JKXXAF.
CLASS: ICM: G03H001-02.  ICS: G03F007-027.  APPLICATION: JP
90-48622 27 Feb 1990.  DOCUMENT TYPE: Patent CA Section: 74
(Radiation Chemistry, Photochemistry, and Photographic and Other
Reprographic Processes)
In the title material comprising allyl diglycol carbonate, 2, 2-bis[3,
5-dibromo-4-(2-methacryloyloxyethoxy)phenyl]propane, and a
photopolymn. initiators, methylene blue and triethanolamine are used
together as the photopolymn. initiators.

Keywords

hologram material photopolymn initiator
methylene blue photopolymn initiator hologram
triethanolamine photopolymn initiator hologram

Index Entries

Holography
hologram-forming materials for, contg. photopolymn. catalysts
Polymerization catalysts
photochem., methylene blue-triethanolamine, for allyl diglycol
carbonate and
bisdibromomethacryloyloxyethoxyphenylpropane
61-73-4
102-71-6, uses
catalyst, for photopolymn. of allyl diglycol carbonate with
bisdibromomethacryloyloxyethoxyphenylpropane
142571-62-8
142571-63-9
prepn. and use of, as photopolymn. initiator for holog. materials

120:186163
The effectiveness of poly(allyl diglycol carbonate) (CR-39) for
low-dose solar ultraviolet dosimetry.
Sydenham, M. M.; Collins, M. J.; Hirst, L. W. (Cent. Eye Res.,
Queensland Univ. Technol., Brisbane 4001, Australia).  Photochem.
Photobiol., 59(1), 58-65 (English) 1994.  CODEN: PHCBAP.  ISSN:
0031-8655.  DOCUMENT TYPE: Journal CA Section: 8 (Radiation
Biochemistry)
The suitability of CR-39 (poly[allyl diglycol carbonate]) for low-dose
solar UV ocular dosimetry was investigated and compared with
polysulfone film.  The CR-39 was sourced from two suppliers and cut
into individual dosimeters and contact lenses.  All CR-39 and
polysulfone dosimeters were exposed to sunlight (0-9 minimal
erythemal dose).  After exposure, CR-39 dosimeters were etched in 6
and 8M KOH (potassium hydroxide) at 80=B0C to reveal UV-induced front
surface opacities that were quantified by spectrophotometric
transmittance measurements at 400 nm and 720 nm.  Post-exposed
polysulfone dosimeters were analyzed for change in absorbance by
spectrophotometry at 330 nm.  The CR-39, in the form of individual
dosimeters and as contact lenses, was not capable of accurate dose
assessment for the dose range considered.  On the other hand,
polysulfone was found to be a reliable dosimeter over the same dose
range.

Keywords

polysulfone dosimeter solar UV radiation
CR39 contact lens solar UV dosimetry

Index Entries

Polysulfones, uses
films, for solar UV radiation dosimetry, CR-39 comparison with
Dosimeters
UV, solar, CR-39 and polysulfone, comparison of
Lenses
contact, for solar UV radiation dosimetry, CR-39, polysulfone film
comparison with
25656-90-0
contact lens, for solar UV radiation dosimetry, polysulfone film
comparison with

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