Isomorphic Crystallization of Poly(hexamethylene adipate-co-butylene adipate): Regulating Crystal Modification of Polymorphic Polyester from Internal Crystalline Lattice
Isomorphic Crystallization of Poly(hexamethylene adipate-co-butylene adipate): Regulating Crystal Modification of Polymorphic Polyester from Internal Crystalline Lattice
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DOI：
10.1021/ma1008989
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发表时间：
2010-08-10
期刊：
影响因子：
5.5
通讯作者：
Inoue, Yoshio
中科院分区：
文献类型：
--
作者：
Liang, Zhichao;Pan, Pengju;Inoue, Yoshio
研究了无规共聚酯P(HA-co-BA)聚己二酸六亚甲酯-己二酸丁二醇酯(P(HA-co-BA))结晶结构的影响因素。P(HA-co-BA)呈等晶态结晶。通过P(HA-co-BA)中HA和BA单元的类质同象结晶行为来调节PBA均聚型晶体的结晶改性。随着本体共聚物中HA单元含量的增加，由于HA均聚物的链构象选择性地与PBAβ晶格的晶格相容，因此PBAβ晶型是首选的。随着HA单元含量的增加，PBAα晶相完全或部分形成的温度显著升高。特别是，在P(HA-co-BA)(34/66)中，在35℃下形成了整齐的PBAβ晶型。这项研究表明，通过同晶结晶，可以实现从内部晶格精确调节多晶型聚酯的结晶改性。
The factors influencing the crystalline structure of polymorphic polymer have been investigated for random copolyester, poly(hexamethylene adipate-co-butylene adipate) (P(HA-co-BA)). P(HA-co-BA) exhibits isodimorphic crystallization. The crystalline modification of the PBA homopolymer type crystal was regulated via the isomorphic crystallization behavior of the HA and the BA units in P(HA-co-BA). The PBA beta-form was preferred with increasing the HA unit content in the bulk copolymer due to the chain conformation of the HA homopolymer is selectively compatible with the crystalline lattice of the PBA beta-form crystal. The temperature for complete or partial formation of the PBA a-form crystal significantly increased with increasing the HA unit content. Particularly, the neat PBA beta-form crystal was formed at 35 C in P(HA-co-BA)(34/66). This study indicates that it is possible to achieve a precise regulation of crystalline modification of polymorphic polyester from the internal crystalline lattice via isomorphic crystallization.