高分子光稳定剂的研究——溶解度参数与光稳定效率的关系

STUDY ON POLYMERIC LIGHT STABILIZER RELATIONSHIP BETWEEN SOLUBILITY PARAMETER AND LIGHT STABLE EFFICIENCY

添加光稳定剂是阻止聚合物因光照氧化降解,延长聚合物制品的使用寿命的有效方法。显然只有当光稳定剂能最大程度地均匀分散在聚合物中才能充分地发挥它的光稳定效率,这对高分子光稳定剂来说尤为重要。 光稳定剂与被稳定的聚合物的相容性对光稳定效率的影响已有过研究。如Ambrovic等曾经报道:随着2-羟基4-烷氧基二苯甲酮中烷基的碳原子数增加,它对聚丙烯的光稳定效率提高。高分子光稳定剂本身是一个有一定分子量的聚合物,使用时它与被稳定聚合物形成了共混体系。我们研究了高分子光稳定剂的溶解度参数和它对聚丙烯的光稳定效率的关系。

Two kinds of polymeric stabilizer containing benzophenone and hindred amine group have been synthesized. The effect of compatibility of polymeric stabilizer in polypropylene on the light stable efficiency has been studied. We found that the light stable efficiency depends on the difference of solubility parameter betweeh polymeric stabilizer and polypropylene. The smaller the difference of solubility parameter it has, the higher the light stable efficiency it becomes.