期刊
POLYMER JOURNAL
卷 34, 期 3, 页码 203-208出版社
SOC POLYMER SCIENCE JAPAN
DOI: 10.1295/polymj.34.203
关键词
poly(L-lactide) (PLLA); poly(trimethylene carbonate) (PTMC); block copolymer; biodegradable; thermoplastic elastomer
Biodegradable ABA triblock copolymers of L-lactide and trimethylene carbonate with given compositions were prepared and chain-extended to produce high molecular weight polymer. The polymers were semicrystalline, and exhibited well microphase-segregated morphology with one crystalline poly(L-lactide) (PLLA) and the other soft and amorphous poly(trimethylene carbonate) (PTMC) block segments. The polymers could be cast into flexible and tough film, reversibly stretchable with elongation up to about 300%. This material may provide a novel thermoplastic elastomer possessing desirable properties including biodegradability, biocompatibility and good mechanical properties including two-phase morphology. Also a preliminary result on the hydrolytic degradation behavior was discussed.
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