Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 2, Issue 10, Pages 2707-2710Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am1005755
Keywords
poly(lactic acid) (PLA); stereocomplex; block-copolymer; crystallization; melting
Funding
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
- Ministry of Education, Culture, Sports, Science and Technology, Japan
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Block-copolymer containing a poly(L-lactic acid) (PLLA) segment was blended with pure poly(D-lactic acid) (PDLA) chain in chloroform solution and casted into the dried film. This method could form the stereocomplex (Sc) crystal of PLLA/PDLA within the nanometer-sized phase separation self-assembled by block-copolymer. Differential scanning calorimetry measurements of the prepared and annealed films gave the maximum achievable melting temperature of 245 degrees C, which was highest among those previously reported for PLA Sc-crystals. Surprisingly, all of added PDLA chains were Sc-crystallized, depending on the blend composition with block-copolymer containing PLLA.
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