Abstract:

Due to its structural drawback, halogenated organic compound, such as PVC and chloroparaffin is easily degraded under heat to form hydrogen chloride, leading to decomposition of such halogenated compound and damage to process equipment.Addition of thermal stabilizer in the halogenated compound can prevent those disadvantages.The usage of traditional thermal stabilizer come under limitation due to toxic heavy metal.Therefore novel thermal stabilizer, in particular organic thermal stabilizer, is the objective of research.Based on traditional thermal stabilization mechanism, polyols which have better stability or synergistic stabilization effect were chosen as lead compounds.These polyols were modified by esterification and etherification to introduce epoxide groups for enhancing stability and ester groups or ether groups for increasing dissolving and dispersing quality with PVC.The effect of such thermal stabilizers was investigated.Polyol derivatives with higher stability and excellent performance were obtained, such as triethylene glycol diglycidyl ether, glycerol epoxy resin and bisphenol A type epoxy resin.It will provide a reference for further research on organic stabilizer.

Key words:

聚氯乙烯, 有机热稳定剂, 刚果红试纸法, 多元醇

摘要：

聚氯乙烯及氯化石蜡等有机卤代物，由于其本身的结构缺陷，在受热使用过程中，会发生分解反应，产生卤化氢，导致卤代物的破坏和加工设备的损坏等严重后果，因此卤代物在受热使用过程中必须添加热稳定剂，以防止卤化氢及进一步的不利结果产生。传统的热稳定剂一般都含有有毒重金属，使用受到极大的限制，因此研究和开发新型无毒热稳定剂，特别是有机热稳定剂是稳定剂发展的重要方向。论文根据传统的热稳定机理，首先通过刚果红实验筛选本身具有较好热稳定性或具有协同热稳定作用的多元醇类化合物为先导物，再采用结构修饰的方法，对选取的多元醇进行酯化和醚化修饰，引入具有稳定活性的环氧基团和增加与PVC相溶性和分散性的酯基或醚键基团，并且对这些结构修饰物进行稳定性能的考察，得到了稳定性和应用性能更优的三甘醇二缩水甘油醚、甘油三缩水甘油醚和双酚A二缩水甘油醚等多元醇衍生物，为有机热稳定剂的深入研究提供了参考。

关键词:

聚氯乙烯, 有机热稳定剂, 刚果红试纸法, 多元醇