A novel catalytic system—NdCl 3  · HMPA/AI(i‐6u) 3  for copolymerization of isoprene and styrene | Zendy

Xu XiaoMing | Zendy; Ni XuFeng | Zendy; Shen ZhiQuan | Zendy

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A novel catalytic system—NdCl 3 · HMPA/AI(i‐6u) 3 for copolymerization of isoprene and styrene

Author(s) -

Xu XiaoMing,

Ni XuFeng,

Shen ZhiQuan

Publication year - 2004

Publication title -

chinese journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.28

H-Index - 41

eISSN - 1614-7065

pISSN - 1001-604X

DOI - 10.1002/cjoc.20040220730

Subject(s) - copolymer , chemistry , styrene , isoprene , polymerization , catalysis , monomer , polymer chemistry , molar ratio , amide , gel permeation chromatography , lanthanide , nuclear chemistry , anhydrous , organic chemistry , polymer , ion

Co polymerization of styrene (St) and isoprene (IP) was carried out with a catalyst system composed of anhydrous lanthanide chloride hexamethyl phosphor amide complex (LnC1 3 ‐HMPA) and aluminum organic compound (AOC). Among the catalysts examined, catalyst NdC1 3 *HMPA/Al(i‐Bu) 3 showed a high activity in the copolymerization under certain conditions giving copolymers (5%‐158 St content) with high cis ‐1, 4 microstructure in IP Units (>95%). The effects of HMPA/Nd molar ratio, Al/Nd molar ratio, monomer/Nd molar ratio, St feed ratio, and the reaction time on copolymerization were examined with this catalytic system. The obtained copolymers were characterized by 1 H and 13 C NMR spectroscopies and gel‐permeation chromatography (GPC).

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