【摘要】 <正> PVC的分子结构中存在不饱和键、支化点和引发剂残基等,在空气中100℃时,即开始轻微分解,150℃以上分解加剧,PVC树脂将脱去HCl,形成致色的共轭多烯结构,发生颜色变化:白色→粉红色→淡黄更多还原

【Abstract】 Organotin thermal stabilizers are known to be a type of the most important PVC thermal stabilizers. They have been applied in a variety of PVC products with good properties. Dialkyltin salts of carboxylic acid (particularly maleic acid and its half esters) and of mercaptans including alkyl thioglycollates, are among the most efficient thermal stablizers for PVC. In this paper, the stabilization mechanism of organotin thermal stabilizers on PVC was discussed. Their study history and present situation have been described, their future development has been forecasted. The major products and manufacturers of organotin thermal stabilizers in the world were also listed.更多还原