Hetero-stereocomplex crystallization between star-shaped 4-arm poly( L -2-hydroxybutanoic acid) and poly( D -lactic acid) from the melt
Hetero-stereocomplex crystallization between star-shaped 4-arm poly( L -2-hydroxybutanoic acid) and poly( D -lactic acid) from the melt
复制标题
星形4臂聚(L -2-羟基丁酸)和聚(D-乳酸)之间的杂立体络合物从熔体中结晶
DOI：
10.1002/macp.201400282
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发表时间：
2014
影响因子：
2.5
通讯作者：
Miho Suzuki
中科院分区：
文献类型：
--
作者：
Hideto Tsuji;Miho Suzuki
四臂聚(L-2-羟基丁酸)[P(L-2HB)]/聚(d-乳酸)(PDLA)共混物发生相分离，形成富含P(L-2HB)和富含PDLA的结构域。异质立体络合物（HTSC）结晶应该发生在两种类型结构域的界面处。 HTSC微晶、P(L-2HB)和PDLA同晶在星形4臂P(L-2HB)/PDLA共混物中可结晶的结晶温度范围比线性1臂P(L-2HB)/PDLA共混物报道的结晶温度范围窄得多，表明星形结构干扰了共混物的等温结晶。在等温结晶过程中，星形 4 臂共混物没有观察到独特的 HTSC 结晶，这与线性 1 臂共混物报道的结果形成鲜明对比。
Four‐arm poly(l‐2‐hydroxybutanoic acid) [P(L‐2HB)]/poly(d‐lactic acid) (PDLA) blends are phase‐separated to form P(L‐2HB)‐rich and PDLA‐rich domains. Hetero‐stereocomplex (HTSC) crystallization should occur at the interface of two types of domains. The crystallization temperature ranges, wherein HTSC crystallites, P(L‐2HB), and PDLA homocrystallites are crystallizable in the star‐shaped 4‐arm P(L‐2HB)/PDLA blends, are much narrower than those reported for linear 1‐arm P(L‐2HB)/PDLA blends, indicating that the star‐shaped architecture disturbs the isothermal crystallization of the blends. Exclusive HTSC crystallization is not observed for the star‐shaped 4‐arm blends during isothermal crystallization in marked contrast with the result reported for the linear 1‐arm blends.