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以双卤代烷烃取代型双锂齐聚物为引发剂、环己烷为溶剂 ,异戊二烯 (Ⅰ )、苯乙烯 (S)单体采用一次加入的方法 ,合成了对称型双端过渡态异戊二烯 -苯乙烯嵌段共聚物S-(S-I) -I-(I-S) -S ,并对双锂体系异戊二烯、苯乙烯共聚合反应过程进行了研究 ,求得不同聚合温度 (4 0℃、5 0℃、60℃ )、不同单体 (S与I)质量比 (3∶7、4∶6、5∶5 )、不同引发剂浓度下假一级表观增长反应速度常数kp″,求得表观增长反应速度常数kp′为 0 .0 1 4 3L/(mol·min) ;求得单体 (S与I)质量比为 3∶7、4∶6、5∶5时的共聚合反应表观活化能分别为 81 .0kJ/mol、80 .9kJ/mol、79.1kJ/mol;求得不同聚合温度 (4 0℃、5 0℃、60℃ )、不同单体 (S与I)质量比 (3∶7、4∶6、5∶5 )下异戊二烯、苯乙烯共聚合反应的竞聚率
In this work, a double-ended double-ended oligomer with double-halogenated alkane as initiator and cyclohexane as solvent was used to synthesize isoprenoid (Ⅰ) and styrene (S) Isoprene-styrene block copolymer S- (SI) -I- (IS) -S. The copolymerization of isoprene and styrene in the dithiane system was studied. The effects of different polymerization temperature (40 ℃, 50 ℃, 60 ℃), the mass ratio of different monomers (S: I) (3: 7, 4: 6, 5: 5) Constant kp ", the apparent growth rate constant kp ’was found to be 0.0143L / (mol · min); the mass ratio of the monomers (S and I) was found to be 3: 7, 4: 6, 5: The apparent activation energy of the copolymerization was 81.0kJ / mol, 80.9kJ / mol and 79.1kJ / mol respectively at 5 and 5 minutes. Different polymerization temperature (40 ℃, 50 ℃, 60 ℃) (S and I) mass ratio (3: 7, 4: 6, 5: 5) isoprene, styrene copolymerization reactivity