期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 29, 期 18, 页码 1554-1560出版社
WILEY-BLACKWELL
DOI: 10.1002/marc.200800383
关键词
catalysis; calix[4]arene; lactide; ring opening polymerization (ROP); titanium
资金
- University of the Ente Cassa di Risparmio
A novel chlorotitanium calix[4]arene complex was synthesized and tested, without activator, as catalyst for the polymerization of L- and rac-lactide under solvent-free conditions. The catalyst displayed high activity, which depended on the monomer-to-catalyst molar ratio, and led to highly isotactic PLLA. Despite concomitant transesterification during the polymerization, polylactide formation was well-controlled, the molar mass distribution indexes remaining in the restricted range of 1.2-1.4.
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