| 聚氯乙烯分子量与性能关系研究 |
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| 引用本文： | 周庆业,宋谋道,张邦华,何炳林,杨亚楠,唐德敏,蔡宝连.聚氯乙烯分子量与性能关系研究[J].南开大学学报,1996(4). |
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| 作者姓名： | 周庆业 宋谋道 张邦华 何炳林 杨亚楠 唐德敏 蔡宝连 |
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| 作者单位： | 南开大学高分子化学研究所，天津大学材料科学与工程系 |
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| 摘 要： | 测定了不同聚合度聚氯乙烯分子量和溶度参数，对其力学性能进行了研究，聚合物分子量对溶度参数不产生影响．随分子量增加，聚合物的冲击强度、断裂强度和断裂伸长率都随之增加，曲服强度下降，聚合物分子量为１．６×１０５时，力学性能变化出现转折点．在高分子量时，ＰＶＣ呈现出热塑弹性体特征，这是由于分子构象熵增加和分子链缠结造成的．
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| 关 键 词： | 聚氯乙烯 分子量 溶度参数 力学性能 熵增 |
THE RELATIONSHIP BETWEEN MOLECULAR WEIGHT AND PROPERTIES OF PVC |
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| Zhou Qingye,Song Moudao,Zhang Banghua, He Binglin.THE RELATIONSHIP BETWEEN MOLECULAR WEIGHT AND PROPERTIES OF PVC[J].Acta Scientiarum Naturalium University Nankaiensis,1996(4). |
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| Authors: | Zhou Qingye Song Moudao Zhang Banghua He Binglin |
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| Abstract: | The molecular weight,solubility parameter and mechanical properties of poly(vinyl chloride) were determined. The experimental results showed that all of tensile strength,impact strength and elongagion at break were increased with increasing the molecular weight of PVC,but yield strength was reduced.The molecular weight of PVC existed a critical point at which the mechanical showed a giant change. Increased the molecular weight, the entropy of PVC molecular chain was increased. which was why PVC could be used an elastomer. |
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| Keywords: | poly(vinyl chloride) molecular weight solubility parameter mechanical properties entropy increase |
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