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检索条件"机构=Polymer Science Program"
853 条 记 录,以下是841-850 订阅
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RAYLEIGH SCATTERING FROM POLYSTYRENE SOLUTIONS
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DISCUSSIONS OF THE FARADAY SOCIETY 1970年 第49期49卷 228-&页
作者: FORD, NC KARASZ, FE OWEN, JEM Department of Physics and Astronomy University of Massachusetts Amherst MA 01002 United States Polymer Science and Engineering Program University of Massachusetts Amherst MA 01002 United States
Rayleigh Scattering From Polystyrene SolutionsBY N. C. FORD, JR., * F. E. KARASZ t AND J. E. M. OWENDepartment of Physics and Astronomy and polymer science and Engineeringprogram, University of Massachusetts, Amherst,...
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Relaxation in Polyurethanes in the Glass Transition Region
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Journal of Rheology 1969年 第4期13卷 527-546页
作者: Kajiyama, T. Macknight, W.J. Department of Chemistry and Polymer Science and Engineering Program University of Massachusetts Amherst Massachusetts 01002 United States
A study has been made of the relaxation phenomena in three series of polyurethanes in the neighborhood of their glass transition temperatures and above. The technique of dynamic mechanical relaxation was used in the i...
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THERMAL PROPERTIES OF POLYURETHANES - ENTHALPIES AND ENTROPIES OF FUSION
POLYMER JOURNAL
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polymer JOURNAL 1970年 第5期1卷 548-&页
作者: KAJIYAMA, T MACKNIGH.WJ Department of Chemistry and Polymer Science and Engineering Program University of Massachusetts
Enthalpies and entropies of fusion have been determined for two series of semicrystalline polyurethanes. The H series is based on 1,6-hexamethylene diisocyanate and various α, ω-diols containin... 详细信息
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Dynamic mechanical behavior of partially hydrolyzed ethylene-vinyl acetate copolymers
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Journal of polymer science: polymer Symposia 1971年 第1期35卷
作者: William J. Macknight Roland J. Tetreault Chemistry Department and Polymer Science and Engineering Program University of Massachusetts Amherst Massachusetts 01002
A dynamic mechanical study has been made of two series of partially hydrolyzed ethylene-vinyl acetate copolymers. Series A contains 75 mole % ethylene and series B contains 59 mole % ethylene. The frequencies employed...
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Poly(ester-acetals) from geometric isomers of methyl azelaaldehydate glycerol acetal†
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Journal of polymer science 1970年 第2期8卷
作者: Robert W. Lenz R. A. Awl W. R. Miller E. H. Pryde Polymer Science and Engineering Program Chemical Engineering Department University of Massachusetts Amherst Massachusetts 01003 Northern Regional Research Laboratory Northern Utilization Research and Development Division Agricultural Research Service U.S. Department of Agriculture Peoria Illinois 61604
The glycerol acetal of methyl azelaaldehydate is an ω-hydroxy ester that exists as a mixture of dioxolanyl and dioxanyl isomers, each having two geometric isomers. Each of the four isomers was isolated by chromatogra...
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STRUCTURE PROPERTIES AND CROSS-LINKING REACTIONS OF POLY(ESTER ACETALS)
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MACROMOLECULES 1969年 第2期2卷 129-&页
作者: LENZ, RW Polymer Science and Engineering Program Chemical Engineering Department University of Massachusetts Amherst Massachusetts 01002 United States
Diester and hydroxy ester monomers containing internal five-, six-, and seven-member acetal rings were prepared and converted into linear polyesters, copolyesters, and copolyamides. The polymers so obtained were chara...
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The Polymorphism of Cholesteryl Esters: Differential Thermal and Microscopic Measurements on Cholesteryl Myristate
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Molecular Crystals 1967年 第1期3卷 103-115页
作者: Edward M. Barrall Roger S. Porter Julian F. Johnson [a] Chevron Research Company Richmond California [b]Polymer Science and Engineering Program University of Massachusetts Amherst Massachusetts
The techniques of differential thermal analysis and photomicroscopy have been combined to eludicate the complex phase relationships and crystallography of cholesteryl myristate. Also, the amount of polarized light rot...
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VISCOSITY OF POLYSTYRENE NEAR GLASS TRANSITION
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JOURNAL OF APPLIED polymer science 1969年 第11期13卷 2427-&页
作者: PENWELL, RC PORTER, RS Polymer Science and Engineering Program University of Massachusetts Amherst Massachusetts 01002
A quantitative explanation is given for the apparent viscosity increase with increasing capillary shear rate for polystyrene at temperatures approaching the glass transition, T g . Possible shifts in T g as a function...
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DIELECTRIC PROPERTIES OF POLY(2,6-DIMETHYL PHENYLENE OXIDE)
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JOURNAL OF APPLIED PHYSICS 1970年 第11期41卷 4357-+页
作者: KARASZ, FE MACKNIGHT, WJ STOELTING, J Polymer Science and Engineering Program and Department of Chemistry University of Massachusetts Amherst Massachusetts 01002
The dielectric relaxation of amorphous bulk poly(2, 6‐dimethyl phenylene oxide) (PPO) has been measured between ?160° and 260°C over a frequency range extending from 0.1 to 10 kHz. Two broad loss peaks of c... 详细信息
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LOW-TEMPERATURE RELAXATIONS IN POLYURETHANS
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MACROMOLECULES 1969年 第3期2卷 254-&页
作者: KAJIYAMA, T MACKNIGH.WJ Department of Chemistry Polymer Science and Engineering Program University of Massachusetts Amherst Massachusetts 01002 United States
A study has been made of the relaxation phenomena in three series of glassy polyurethans in the temperature range from -190 to -100° and at various frequencies up to 110 Hz using dynamic mechanical and dielectric...
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