丙烯腈在聚丙烯上接枝共聚

Graft Copolymerization of Acrylonitrile with Polypropylene

丙烯腈在聚丙烯上非均相接枝共聚，得杨梅形氰基树脂。研究了接枝共聚条件对单体转化率和接枝率的影响。表观聚合速度可表示为，碰撞频率因子和聚合活化能分别是1．36×1011s-1和99．2kJ．mol-1。从光学显微镜观察到改性树脂在水中接枝连束的分布状态。丙烯腈和二乙烯基苯在聚丙烯上接校共聚，再经二甲苯率取，得笼形氰基树脂。二乙烯基苯在单体中的相对含量对树脂的溶胀性能和笼孔尺寸有很大的影响，制取功能材料时应予适当调节。扫描电镜照片展示了笼形树脂的笼腔和网络结构形态。

Arbutus cyano resin was prepared by heterogeneous graft copllymerizaion of acrylonitrile with polypropylene. The effects of the conditions of graft copolymerization on the monomer conversions and the grafting yields were investigated.The apparent polymerization rate may be expressed as , the collision frequency factor and the apparent polymerization activation energg were found to be 1. 36 × 1011s-1 and 99. 2kl. mol - 1, respectively. In water, the distributed state of the bundle grafting chains of modified resin was observed by microscope. Acrylonitrile copolymerized with divinylbenzene on polypropylene and then extracted with xylene, the cage cyano resin was obtained.The relative content of divinylbenzene in resin affects the swelling eapacity and the cage structure to a great extent, therefore, the molar ratio of DVB/AN must be regulated in a suitable proportion for the use as a functional material . The structure shapes of the cage cavity and the network of cage resin were showed by the photographs of SEM.