组成对聚（己内酰胺-己内酯）共聚物结晶、吸水性和生物降解性的影响。

Effect of Composition on the Crystallization, Water Absorption, and Biodegradation of Poly(-caprolactam-caprolactone) Copolymers.

作者信息

Dou Yuanyuan, Mu Xinyu, Chen Yuting, Ning Zhenbo, Gan Zhihua, Jiang Ni

机构信息

State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomaterials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.

出版信息

Polymers (Basel). 2020 Oct 27;12(11):2488. doi: 10.3390/polym12112488.

DOI:10.3390/polym12112488

PMID:33120906

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7692460/

Abstract

Poly(ester amide)s have aroused extensive research interest due to the combination of the degradability of polyester and the higher mechanical properties of polyamide. In this work, a series of poly(-caprolactam-caprolactone) (P(CLACLO)) copolymers with different compositions were synthesized by anionic copolymerization. The structure, crystallization behavior, water absorption, and biodegradation behavior of these copolymers were investigated by means of nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and polarized optical micrographs (POM). The results indicated that the composition of P(CLACLO) copolymers can be adjusted by the molar feed ratio. The PCL blocks decreased the crystallization rate of PA6 blocks but had little effect on the melting behavior of PA6, while the crystallized PA6 acted as a heterogeneous nucleating agent and greatly improved the crystallization rate of PCL. Moreover, the introduction of PCL blocks greatly reduced the water absorption of P(CLACLO) copolymers and endow them a certain degree of degradability.

摘要

聚（酯酰胺）由于兼具聚酯的可降解性和聚酰胺较高的机械性能，已引起广泛的研究兴趣。在本工作中，通过阴离子共聚合成了一系列不同组成的聚（ε-己内酰胺-己内酯）（P(CLACLO)）共聚物。借助核磁共振（NMR）、傅里叶变换红外光谱（FTIR）、差示扫描量热法（DSC）、广角X射线衍射（WAXD）和偏光显微镜照片（POM）对这些共聚物的结构、结晶行为、吸水性和生物降解行为进行了研究。结果表明，P(CLACLO)共聚物的组成可通过摩尔进料比进行调节。聚己内酯（PCL）链段降低了聚酰胺6（PA6）链段的结晶速率，但对PA6的熔融行为影响不大，而结晶的PA6作为异质成核剂，大大提高了PCL的结晶速率。此外，PCL链段的引入大大降低了P(CLACLO)共聚物的吸水性，并赋予它们一定程度的可降解性。