Preparation of PP/POE/PS Ternary Alloys via Diffusion and Polymerization of Styrene in PP/POE Alloys
Preparation of PP/POE/PS Ternary Alloys via Diffusion and Polymerization of Styrene in PP/POE Alloys
复制标题
苯乙烯在PP/POE合金中扩散聚合制备PP/POE/PS三元合金
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Yu Jian
中科院分区：
文献类型：
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作者：
Yao Xue-Rong;Guo Zhao-Xia;Yu Jian
聚丙烯/乙烯辛烯共聚物/聚苯乙烯通过苯乙烯（St）在PP/POE合金颗粒中的扩散聚合反应，制备了PP/POE/PS三元合金，St可以扩散到PP/POE合金颗粒的中心区域，在PP/POE合金颗粒中，St可以扩散到PP/POE/PS合金颗粒的中心区域，而在PP/POE合金颗粒中，St可以扩散到PP/POE/PS合金颗粒的中心区域。POE相主要包括POE合金颗粒和PS相，粒径在几十纳米到几百纳米之间，PS颗粒的大小受苯乙烯吸附量和粒径的影响PP/POE共混体系中，苯乙烯在POE相中的扩散聚合过程为：苯乙烯在（质量比，PP/POE/PS体系中苯乙烯的扩散速率和最大吸附量均大于纯PP体系，这是由于POE非晶相的存在有利于单体的扩散，PS含量随POE含量的增加而增加。通过改变单体的用量可以制备PS合金，PS的加入使POE微区变大，降低了PP的熔融温度和结晶温度，高含量的PS分散在PP/POE/PS中起到了成核剂的作用。
Polypropylene/ethylene octene copolymer/polystyrene(PP/POE/PS) ternary alloys were prepared via diffusion and subsequent polymerization of styrene(St) in PP/POE alloy granules.St could diffuse into the center of the PP/POE alloy granules and PS phases mostly included in POE phases with a particle size from several tens of nanometers to several hundred nanometers.The size of PS particles was influenced by the amount of styrene adsorbed and the size of the POE phases.The PS particles in POE phases formed in the center of the granules were the smallest.The diffusion and polymerization process of St in PP/POE(mass ratio,80∶20) was studied.The diffusion rate and the maximum adsorption of styrene in PP/POE were larger than those in pure PP as existence of amorphous POE phase was beneficial for diffusion of monomer.The content of PS in PP/POE/PS alloys can be tailored by changing the amount of monomer.Incorporation of PS into POE domains made the POE domains bigger and then resulted in lower melting temperatures and crystalline temperatures of PP,and PS dispersed in PP/POE/PS with a high PS content acted as a nucleation agent of PP.