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High‐Molecular‐Weight Polycarbonates Synthesized by Enzymatic ROP of a Cyclic Carbonate as a Green Process
Author(s) -
Yamamoto Yoshio,
Kaihara Sachiko,
Toshima Kazunobu,
Matsumura Shuichi
Publication year - 2009
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200900039
Subject(s) - carbonate , chemistry , enzyme , polycarbonate , biochemistry , organic chemistry
High‐molecular‐weight PTeMC and PHMC were prepared by the lipase‐catalyzed polymerization of butane‐1,4‐diol or hexane‐1,6‐diol and diphenyl carbonate via the formation of a cyclic dimer by a green process. Cyclic carbonate dimers were prepared by the lipase‐catalyzed condensation of diphenyl carbonate with butane‐1,4‐diol or hexane‐1,6‐diol in dilute toluene solution using an immobilized lipase from Candida antarctica , and was followed by the ring‐opening polymerization of the cyclic dimer in bulk with the same lipase to produce PTeMC with $\overline M _{\rm w}$ = 119 000 g · mol −1 and PHMC with $\overline M _{\rm w}$ = 399 000 g · mol −1 , respectively. Additionally, enzymatic polymerization of cyclic carbonate dimer was analyzed with respect to the K m and V max for the lipase.