title: Stereo-complex crystallization of poly(lactic acid)s in block-copolymer phase separation.
abstract: 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 °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.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Uehara
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Karaki
authors.forename: Shizuka
authors.initials: S
authors.lastname: Wada
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yamanobe
mesh_terms: D019344:Lactic Acid / Q000737:chemistry*; D044367:Phase Transition; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D013237:Stereoisomerism; D044366:Transition Temperature
chemical_list: D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide)