Stereoblock Polylactides as High-Performance Bio-Based Polymers

被引:187
作者
Kakuta, Matsuko [1 ]
Hirata, Masayuki [1 ]
Kimura, Yoshiharu [1 ]
机构
[1] Kyoto Inst Technol, Dept Biomol Engn, Sakyo Ku, Kyoto 6068585, Japan
关键词
Bio-based polymer; poly(lactic acid); stereocomplex; stereoblock; sb-PLA; Neo-PLA; ENANTIOMERIC POLY(LACTIC ACID)S; RING-OPENING POLYMERIZATION; SOLID-STATE POLYCONDENSATION; HOT DRAWING PREPARATION; L-LACTIC ACID; STEREOCOMPLEX FORMATION; POLY(L-LACTIC ACID); STEREOSELECTIVE POLYMERIZATION; MECHANICAL-PROPERTIES; RACEMIC LACTIDE;
D O I
10.1080/15583720902834825
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Mixing of poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA) affords stereocomplex-type PLA (sc-PLA) having a high melting temperature of 230C, and its use provides higher thermal properties for PLA materials. The stereocomplex formation, however, is always accompanied by homochiral crystallization of PLLA and PDLA, causing deterioration of properties, when their molecular weight is higher than 100 kDa. Therefore, stereoblock-type PLAs (sb-PLA) consisting of PLLA and PDLA stereosequences are developed by utilizing new synthetic methodologies. The sb-PLAs exclusively generate the stereocomplex because of the better mixing state of their enantiomeric sequences and can be utilized as high-performance bio-based materials.
引用
收藏
页码:107 / 140
页数:34
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