国外典型特种PVC树脂的性能、用途和制备方法(续1)

Properties,applications and preparation methods of foreign typical special PVC resins(continuation Ⅰ)

通过查阅大量国外的专利和论文,总结了以下4类特种PVC树脂的性能、用途和制备方法:①只以氯乙烯为原料,通过不同的成粒过程或不同的聚合条件制备的特种PVC树脂;②由多种单体共聚而成的PVC共聚树脂;③通过接枝改性制备的PVC接枝树脂;④对PVC树脂的侧基或端基进行化学改性制备的特种PVC树脂。

According to consult a number of foreign patents and papcrs, the properties, applica- tions and preparation methods of special PVC resins are summarized. Therc are four types of special PVC resins as follows： 0 the special PVC resins, which are prepared only from vinyl chloride through the differcnt granulating courses or polymerization conditions; the PVC copolymer res- ins, which are prcpared from sevcral monomcrs; the PVC graft resins, which are prepared by graft modifications; the special PVC resins, which are prepared by the chemical modifications on PVC rcsins＇ side groups or cnd groups.