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检索条件"机构=Polymer Science Program"
846 条 记 录,以下是841-850 订阅
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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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DYNAMIC MECHANICAL PROPERTIES OF POLY(2,6-DIMETHYL-1,4-PHENYLENE ETHER)-POLYSTYRENE BLENDS
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polymer ENGINEERING AND science 1970年 第3期10卷 133-&页
作者: STOELTIN.J KARASZ, FE MACKNIGH.WJ Polymer Science and Engineering Program and Department of Chemistry University of Massachusetts Amherst Massachusetts
Blends of poly(2,6‐dimethyl‐1,4‐phenylene ether) (PPO) and atactic polystyrene (PS) have been prepared by mechanically mixing powders of the two polymers and subjecting the mixtures to three different thermal treat...
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The Viscosity of Mesophases Formed by Cholesteryl Myristate
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Molecular Crystals and Liquid Crystals 1969年 第1期8卷 443-455页
作者: Kunisuke Sakamoto Roger S. Porter Julian F. Johnson On leave from Mitsubishi Chemical Industries Limited Tokyo Japan Polymer Science and Engineering Program University of Massachusetts Amherst Massachusetts Department of Chemistry the Institute of Materials Science University of Connecticut Storrs Connecticut
This investigation provides the first reported viscosity measurements on cholesteryl myristate. Viscosities were measured as a function of both temperature and shear over temperatures corresponding to the isotropic li...
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Liquid Crystals and Ordered Fluids  1
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1000年
作者: Julian F. Johnson Roger S. Porter
This volume contains papers presented at the Second Symposium on Ordered Fluids and Liquid Crystals held at the 158th National Meeting of the American Chemical Society, New York, Sep­ tember, 1969. The Symposium ... 详细信息
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