Stereocomplex Crystallization between l- and d-Configured Staggered Asymmetric Random Copolymers Based on 2-Hydroxyalkanoic Acids
Stereocomplex Crystallization between l- and d-Configured Staggered Asymmetric Random Copolymers Based on 2-Hydroxyalkanoic Acids
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DOI：
10.1021/acs.cgd.8b00863
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发表时间：
2018-08
影响因子：
3.8
通讯作者：
H. Tsuji;Katsuya Osanai;Y. Arakawa
中科院分区：
文献类型：
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作者：
H. Tsuji;Katsuya Osanai;Y. Arakawa
L-构型聚(1-2-羟基丁酸-共-L-乳酸)[P(L-2HB-共-LLA)](50/50)和d-构型聚(d-2-羟基丁酸-共-d-2-羟基-3-丁酸)的交错不对称2-羟基丁酸基无规共聚物共混物中的立体络合物(SC)结晶首次报道了由三种不同化学结构的单体组成的[P(D-2HB-co-D-2H3MB)](50/50)。交错不对称无规共聚物共混物的SC微晶的广角X射线衍射图和晶面距离值与聚(1-2-羟基丁酸)/聚(d-2-羟基丁酸)SC微晶的相似。共聚物共混物样品的 SC 熔融温度值远高于非共混 P(L-2HB-co-LLA) 和 P(D-2HB-co-D-2H3MB) 样品的 P(L-2HB-co-LLA) 和 P(D-2HB-co-D-2H3MB) 单个微晶的熔融温度值（分别为 90.5 和 96.2–126.0 °C）。此外，本文首次报道了基于2-羟基链烷酸的无规共聚物...
Stereocomplex (SC) crystallization in staggered asymmetric 2-hydroxyalkanoic acid-based random copolymer blends of l-configured poly(l-2-hydroxybutanoic acid-co-l-lactic acid) [P(L-2HB-co-LLA)] (50/50) and d-configured poly(d-2-hydroxybutanoic acid-co-d-2-hydroxy-3-butanoic acid) [P(D-2HB-co-D-2H3MB)] (50/50) composed of monomers with three different chemical structures was reported for the first time. The wide-angle X-ray diffractometry profiles and interplanar distance values of SC crystallites of the staggered asymmetric random copolymer blends were similar to those of poly(l-2-hydroxybutanoic acid)/poly(d-2-hydroxybutanoic acid) SC crystallites. The melting temperature values of SC of copolymer blend samples were much higher than those of P(L-2HB-co-LLA) and P(D-2HB-co-D-2H3MB) individual crystallites of the nonblended P(L-2HB-co-LLA) and P(D-2HB-co-D-2H3MB) samples (90.5 and 96.2–126.0 °C, respectively). Moreover, this article reports for the first time that the 2-hydroxyalkanoic acid-based random co...