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Synthesis of poly(lactic acid‐ co ‐menthol) via direct melt polycondensation and its characterization
Author(s) -
Mao ChaoXu,
Luo ShiHe,
Wang QunFang,
Xiong JinFeng,
Wang ZhaoYang
Publication year - 2012
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/app.36968
Subject(s) - copolymer , condensation polymer , lactic acid , thermal decomposition , materials science , polymer chemistry , fourier transform infrared spectroscopy , melting point , nuclear chemistry , chemical engineering , chemistry , organic chemistry , polymer , composite material , biology , bacteria , engineering , genetics
Directly starting from D,L ‐lactic acid (LA) and L ‐menthol, poly(lactic acid‐ co ‐menthol) (PLAM) as potential solid mint flavor was synthesized via melt polycondensation. The synthetic conditions, including type and dosage of catalyst, temperature and time of copolymerization, were discussed. The structure and properties of the copolymer were systematically characterized with FTIR, 1 H‐NMR, GPC, DSC, TG, and XRD. The influences of molar feed ratios on the properties of PLAM were also discussed. The copolymer PLAM with the biggest M w of 11,600 Da was obtained. The T g of PLAM is lower than the T g of homopolymer poly( D,L ‐lactic acid) (PDLLA), and all copolymers have higher thermal decomposition temperature. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012