【摘 要】
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该文应用傅立叶变换红外光谱仪、紫外分光光度计对聚氯乙烯中存在的弱结构,过氧 结构以及碳-碳双键结构等进行了研究;用催化溴加成法测定了优化前的PVC树脂总双键的含量,并对
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该文应用傅立叶变换红外光谱仪、紫外分光光度计对聚氯乙烯中存在的弱结构,过氧 结构以及碳-碳双键结构等进行了研究;用催化溴加成法测定了优化前的PVC树脂总双键的含量,并对热氧老的PVC树脂中总双键含量的变化进行了研究;采用电位滴定法对聚氯乙烯中 的烯丙基氯进行了测定,并研究了烯丙基氯的含量与相对分子质量之间的关系;使用白度仪测定了聚氯乙烯的白度降,研究了聚氯乙烯的初期着色性能;通过热重分析仪研究了聚氯乙的况氯化氢的速度,进一步探讨了氯乙烯的热稳定性.该文用红外热跟踪法、紫外线辐照法对一厂家的优化前、优化中、优化后的聚氯乙烯树脂进行了热氧与光氧稳定性的研究并与不同厂家的对照样进行了对比,结果证明聚氯乙烯的热稳定性随着聚氯乙烯中弱结构含量的增加而变差,并由此比较出了优化前后PVC树脂热稳定性的差异.该文还应用白度测定了同一 厂家的优化前、优化中、优化后的氯乙烯树脂及不同厂家的对照样的白度降,结果表明全面优化后的样品,其白度降最小,初期着色性最佳,初期着色性与PVC链的立构有关.
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