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Complex Formation between Polyisoprene and Cyclodextrins
Author(s) -
Michishita Takeshi,
Takashima Yoshinori,
Harada Akira
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400108
Subject(s) - monomer , cyclodextrin , polymer chemistry , chemistry , polymer , molecular model , organic chemistry
Summary: Polyisoprenes were found to form inclusion complexes with cyclodextrins with high selectivity to give crystalline compounds. β ‐Cyclodextrin formed complexes only with polyisoprene of low molecular weight, whereas γ ‐cyclodextrin formed complexes with polyisoprenes of high molecular weight. α ‐Cyclodextrin did not form complexes with polyisoprene of any molecular weight. The yields of γ ‐cyclodextrin complexes increased with increasing molecular weights of the polyisoprenes and reached a maximum of around several thousands, and then decreased.Theoretical depiction of the complex formed between polyisoprene and γ ‐CD, as determined by molecular modelling studies. The PIP chain is shown penetrating the γ ‐CD cavity, which, in turn, accommodates one to 1.5 monomer units of PIP.