摘要
在马来酸酐-苯乙烯本体聚合反应过程中，于70℃和低引发剂浓度（0．59～1．8×10(-3)mol／L条件下，共聚物组成与单体的配比无关，生成无规共聚物；在高引发剂浓度（2×10(-2)mol／L），随马来酸酐单体含量的增加，趋向生成1：1交替共聚物．温度的提高（≤140℃）可以使生成的共聚物结构向1：1组成移动，当温度超过140℃时将生成无现共聚物．在本体聚合反应体系中，存在共聚反应和苯乙烯的均聚反应，而且随着温度的提高，均聚反应的程度增加．
The comPosition of copolymer depended on the concentration of initiator in thebulk free radical polymerization of styrene (St) and maleic anhydride (MA) at 7O ℃. In Iowconcentration of initiator the cornposition of copolymer had nothing to do with the content ofmonomer in the feed. However, in high concentration of initiator the product of polymeriza-tion contained polystyrene and random copolymer. Homopolymerization of styrene took placewhen copolymerization stopped at lower conversion. At the sarne time, copolymer tended to1: 1 alternation with the increasing of content of MA in the feed in the range of 70~160℃.The experimental results indicated that the two sorts of polymerization simultaneously exist-ed if temperature was over 12O℃. The conversion of copolymerization had less dependenceon the temperature and were less than 50%. The composition of copolymers tended to 1: 1alternation as the temperature approached 140℃. The random copolymers of St and MAwere yielded above 140 ℃.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第9期1537-1540,共4页
Chemical Journal of Chinese Universities
基金
北京理工大学引进人才启动基金
关键词
苯乙烯
马来酸酐
自由基共聚合
本体聚合
Styrene, Maleic anhydride, Bulk free radical copolymerization
