摘要
利用ＳＮ－１催化剂对苯乙烯－１－丁烯进行“原位”共聚合反应，分别采用同时加料和顺序加料两种共聚合反应方式制备了两大类苯乙烯－１－丁烯共聚物合金。结果表明，不论是哪种共聚合方式，ＳＮ－１催化剂对苯乙烯－１－丁烯共聚合均表现出较高的催化活性及单体转化率，所得共聚物合金具有高热软化温度和较好的物理力学性能。利用ＳＥＭ和ＴＥＭ对共聚物合金的微观形态观察结果表明，在共聚合反应过程中生成的共聚物对共聚物合金的良好的增容作用是导致其综合性能得以优化改善的关键。
In order to improve the impact strength of the isotactic polystyrene and the thermoresistance of isotactic poly(1butene), authors successfully applied a novel MgCl2supported Ticatalyst modified with a rate earth Ndcompound, to copolymerize styrene and 1butene and get two series of polymer alloys by different feeding methods. For the polymer alloys prepared by sequential feeding method, the unnotched Izod impact strength varies from 8.84 to 36.2 kg/m2 with the decrement of the molar ratio of styrene/1butene in feeds. For the polymer alloys prepared by simultaneous feeding method, the impact strength varies from 6.2 to 24.5 kg/m2. Besides, the soften temperature (varied from 105 ℃ to 136 ℃) of both series of polymer alloys are much higher than HIPS (82 ℃) and ABS (88 ℃). These novel polymer alloys were expected to be used as a series of engineering plastics of high performance.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第1期78-82,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
高分子合金
苯乙烯
丁烯
共聚物
结构
性能
polymer alloy, Ticatalyst, styrene 1butene, microstructure
