Title of Paper:星形氢化苯乙烯-二烯烃共聚物结构分析方法

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Date of Publication:2022-07-01

Journal:Polymer Bulletin

Issue:11

Page Number:44-51

ISSN No.:1003-3726

Key Words:"Living anionic polymerization; Hydrogenated star polymers of styrene and dienes; Analysis of structure"

CN No.:11-2051/O6

Abstract:Based on the living anionic polymerization, three star tri-polymers of styrene and dienes (S-IBS) were successfully synthesized with divinylbenzene (DVB) as coupling agent. Their average grafted number (AGN) was above 7.0 and the efficiency for coupling (CE) was about 93%. Then, the hydrogenated star polymers (HS-IBS) were also successfully prepared. The efficiency for hydrogenation was above 95 %,and the calculation for composition of copolymers was established. The copolymers of HS-IBS were regarded as tri-polymers of ethylene, propylene and styrene (E-P-St), thus the 13C and 1H NMR method were used for characterization and calculation. The results between calculated compositions after hydrogenation, feed ratios and before hydrogenation showed the minimal error below 1%. This also described the calculation method exhibited good precision in the analysis of hydrogenated tri-polymers.

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