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首页> 外文期刊>Journal of Applied Polymer Science >GELATION OF POLY(VINYL ALCOHOL) ETHYLENE GLYCOL SOLUTIONS AND PROPERTIES OF GELS
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GELATION OF POLY(VINYL ALCOHOL) ETHYLENE GLYCOL SOLUTIONS AND PROPERTIES OF GELS

机译：聚乙烯醇乙烯乙二醇溶液的凝胶化及凝胶的性质

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The melting temperature of the gels of the poly(vinyl alcohol) (PVA)/ethylene glycol(EG) system was measured. It was found that the temperature was independent of the thermal hysteresis. The apparent enthalpy of the fusion of the junction, Delta H, was 206 kJ/mol for a high molecular weight atactic PVA (HDP a-PVA), 172 kJ/ mol for a low molecular weight syndiotacticity-rich PVA (LDP s-PVA), and 238 kJ/mol for an HDP s-PVA. The gels obtained by chilling at temperatures over 80 degrees C or by gradual cooling are considered to have larger microcrystals. The Young's modulus of the HDP a-PVA drawn films were highest among the samples tested. The maximum and mean Young's moduli of the HDP a-PVA films drawn 15 times the original length were 37 and 26 GPa, respectively. (C) 1997 John Wiley & Sons, Inc. [References: 25]
机译：测量了聚乙烯醇（PVA）/乙二醇（EG）体系的凝胶的熔融温度。发现温度与热滞后无关。对于高分子量无规立构PVA（HDP a-PVA），结的融合的表观焓ΔH为206 kJ / mol，对于低分子量富同规立构的PVA（LDP s-PVA）为172 kJ / mol ）和238 kJ / mol的HDP s-PVA。通过在超过80℃的温度下冷却或通过逐渐冷却而获得的凝胶被认为具有较大的微晶。 HDP a-PVA拉伸薄膜的杨氏模量在测试的样品中最高。拉伸15倍于原始长度的HDP a-PVA薄膜的最大和平均杨氏模量分别为37 GPa和26 GPa。 （C）1997 John Wiley＆Sons，Inc. [参考：25]

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