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Cationic polymerization of β‐pinene with the AlCl 3 /SbCl 3 binary catalyst: Comparison with α‐pinene polymerization
Author(s) -
Lu Jiang,
Kamigaito Masami,
Sawamoto Mitsuo,
Higashimura Toshinobu,
Deng YunXiang
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960808)61:6<1011::aid-app15>3.0.co;2-z
Subject(s) - cationic polymerization , pinene , polymerization , catalysis , polymer chemistry , chemistry , chemical engineering , materials science , organic chemistry , polymer , engineering
The polymerization of β‐pinene with the AlCl 3 /SbCl 3 binary catalyst was investigated in toluene at −40°C and was compared with that of α‐pinene. The polymerization of β‐pinene with AlCl 3 alone was very rapid and retarded on addition of SbCl 3 , in sharp contrast to that of α‐pinene where added SbCl 3 remarkably accelerated it to give relatively high molecular weight oligomers. Attempted copolymerization of the two isomers with the binary catalyst, in turn, induced their parallel homopolymerizations, indicating that the copolymerization was difficult due to the large difference in reactivity. The homopolymerizations with AlCl 3 /SbCl 3 were not seriously affected by a sterically hindered base, 2,6‐di‐ tert ‐butyl‐4‐methylpyridine (DTBMP); the initiating species, therefore, would be different in nature from a proton. © 1996 John Wiley & Sons, Inc.