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Synthesis of poly( L ‐lactide)‐ block ‐polyisobutylene‐ block ‐poly( L ‐lactide), a new biodegradable thermoplastic elastomer
Author(s) -
Sipos László,
Zsuga Miklós,
Deák György
Publication year - 1995
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.1995.030161209
Subject(s) - copolymer , thermoplastic elastomer , lactide , molar mass , materials science , polymer chemistry , isobutylene , elastomer , ring opening polymerization , polymer , polymerization , thermoplastic , telechelic polymer , composite material , end group
The anionic ring‐opening polymerization of L‐lactide was initiated by dipotassium‐poly‐isobutylene‐alcoholate telechelic polymer to yield poly( L ‐lactide)‐ block ‐polyisobutylene‐ block ‐poly( L ‐lactide) triblock copolymer, a partially biodegradable thermoplastic elastomer. The pure triblock copolymer was obtained by gradient column chromatography on silica gel. The molar mass and molar mass distribution of the block copolymer was ascertained by SEC and quantitative 1 H NMR spectroscopy. It showed two glass transitions and microphase separation.