Crystallization of Supramolecular Pseudoblock Copolymers
Crystallization of Supramolecular Pseudoblock Copolymers
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DOI：
10.1021/ma400622w
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发表时间：
2013-05
期刊：
影响因子：
5.5
通讯作者：
Elena Ostas;Tingzi Yan;T. Thurn‐Albrecht;W. Binder
中科院分区：
文献类型：
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作者：
Elena Ostas;Tingzi Yan;T. Thurn‐Albrecht;W. Binder
由于超分子键的存在，超分子拟嵌段共聚物(SPBCP)的结晶过程比传统的共价键合嵌段共聚物(BCP)更为复杂。因此，包括在聚合物链端上的超分子结合动机显示出额外的动态效应以及可能的结晶核。在本文中，我们系统地研究了SPBCP的非等温结晶过程，该SPBCP由一个可结晶的聚(e-己内酯)(PCL)通过三重氢键连接到一个短烷基改性的2，4-二氨基三氮杂环己烷或与一大块无定形聚异丁烯(PIB)连接而成。研究了PCL的结晶过程，无论是在成核过程中还是在晶体生长过程中，这两个基团都充当了结晶过程的超分子屏障。与没有烷基修饰的对照样品相比，烷基修饰的2，4-二氨基三嗪的短势垒对PCL的结晶温度有很大的影响。
Because of the presence of supramolecular bonds, the crystallization process of supramolecular pseudoblock copolymers (SPBCP) is more complex in comparison to conventional covalently bonded block copolymers (BCP). Thus, supramolecular binding motives included on the polymer chain-ends display additional dynamic effects as well as possible nuclei for the crystallization. In this article we systematically study nonisothermal crystallization processes in SPBCP’s consisting of a crystallizable poly(e-caprolactone) (PCL) connected via triple hydrogen bonds to either a short alkyl-modified 2,4-diaminotriazine, or bound to a large block of amorphous poly(isobutylene) (PIB). The crystallization of the PCL is studied with both groups acting as supramolecular barriers for the crystallization process, either during nucleation or during crystal growth. A strong influence of the short alkyl-modified 2,4-diaminotriazine barrier on the crystallization temperature of the PCL compared to the control sample devoid of this ...