PP-g-MAZn离聚物的固相法合成与表征

Solid-phase Synthesis and Characterization of PP-g-MAZn Ionomer

以ＤＣＰＯ为引发剂，将ＰＰ粉末通过固相法与马来酸锌发生接枝反应，合成不同接枝率的ＰＰ－ｇ－ＭＡＺｎ离聚物。考察反应温度、引发剂浓度、单体的用量对接枝率的影响。研究表明∶①ＰＰ－ｇ－ＭＡＺｎ离聚物的ＦＴＩＲ图中，１５４０ｃｍ－１～１６４３ｃｍ－１之间出现宽的峰，说明ＭＡＺｎ与ＰＰ发生了接枝反应；②ＰＰ－ｇ－ＭＡＺｎ的ＷＡＸＤ谱中在２θ＝１０．６°、３１．２°、３３．２°处有衍射峰，表明有新的有序区；此外，离聚物的结晶度较纯的ＰＰ没有明显的减小；③ＤＳＣ曲线说明ＰＰ－ｇ－ＭＡＺｎ离聚物的结晶温度随接枝率的提高而升高；离聚物不仅玻璃化转变温度大大升高，而且出现了明显的双重玻璃化转变，对于离子含量较高的离聚物还出现由离子簇所产生的玻璃化转变。

Maleic zinc was successfully grafted onto PP powder by solid-phase grafting technology, which was proved by the infrared spectra, the effects of several factors, such as the reaction temperature ,the content of initiator DCPO and monomer on grafting degree were investigated. The WAXD ana lysis show that there is: new crystallizing field in the PP grafted maleic zinc. The analysis of DSC show: there are double glass-transition temperatures in the ionomers because of the cluster formed by the ionic multiplets. The interpenetrating cluster in the ionomer of high grafting degree results in a higher glass-transition temperature, some separate phases were observed