SYNTHESIS AND PROPERTIES OF POLYURETHANE POLYSTYRENE-GRAFTED INTERPENETRATING POLYMER NETWORKS USING A MICROGEL PROCESS

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题名:	SYNTHESIS AND PROPERTIES OF POLYURETHANE POLYSTYRENE-GRAFTED INTERPENETRATING POLYMER NETWORKS USING A MICROGEL PROCESS
作者:	CHEN,H;CHEN,JM
贡献者:	物理研究所
关键词:	HIGH-PRESSURE;LINEAR BLENDS;TG BEHAVIOR;IPNS;MORPHOLOGY;COPOLYMERIZATION;DENSITY
日期:	1993
上传时间:	2010-07-08 14:12:34 (UTC+8)
出版者:	中央大學
摘要:	Polyurethane-polystyrene-grafted interpenetrating polymer networks (IPNs) were prepared in the presence of a soluble microgel. The objective was to understand the effect of the microgel on the physical and mechanical properties of the IPN systems. Three types of microgels were prepared by the condensation reaction of various amounts of tolylene diisocyanate (TDI) with linear polystyrene containing hydroxyl groups. The structure of the microgel was determined by gel permeation chromatography and intrinsic viscosity measurement. Increasing the amount of TDI resulted in a microgel having a more compact structure. The dynamic mechanical behavior, mechanical properties, densities, and swelling ratios of the IPNs were determined. Only one broad T(g) was observed in each of the dynamic mechanical spectra of the IPNs, whether the IPNs were prepared from microgel or not. This is because of increased compatibility of the two networks by the grafting reaction. Using a microgel to prepare IPNs could further improve the degree of network interpenetration. In addition, higher tensile strength and elongation at break were obtained for the IPNs, when the proper structure of the microgel was used. (C) 1993 John Wiley & Sons, Inc.
關聯:	JOURNAL OF APPLIED POLYMER SCIENCE
显示于类别:	[物理研究所] 期刊論文

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