Li Hui, Fan Xiaodong, Min Xin, Qian Yongchao, Tian Wei
The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710072, P. R. China.
Macromol Rapid Commun. 2017 Mar;38(5). doi: 10.1002/marc.201600631. Epub 2016 Dec 23.
Supramolecular copolymers can not only enrich the diversity of the polymer backbone but also exhibit certain special and improved properties compared with supramolecular homopolymers. However, the synthesis procedure of supramolecular copolymers is relatively complicated and time-consuming. Herein, a simple transformation from an AB -based supramolecular hyperbranched homopolymer to an AB +CD -based supramolecular hyperbranched alternating copolymer by the "competitive self-sorting" strategy is reported. After adding CD monomer, which bears a competitive neutral guest moiety (TAPN) and two receptive benzo-21-crown-7 host moieties (B21C7), to the as-prepared AB -type supramolecular hyperbranched homopolymer constructed by the self-assembly of dialkylammonium salt (DAAS, A group)-functionalized pillar[5]arene (MeP5, B groups) monomers, the initial homopolymer structure is disrupted and then reassemble into a new supramolecular hyperbranched alternating copolymer based on the competitive self-sorting interaction between MeP5-TAPN and B21C7-DAAS. This study supplies a convenient approach to directly transform supramolecular homopolymers into supramolecular copolymers.
超分子共聚物不仅可以丰富聚合物主链的多样性，而且与超分子均聚物相比还表现出某些特殊的和改进的性能。然而，超分子共聚物的合成过程相对复杂且耗时。在此，报道了一种通过“竞争性自分类”策略将基于AB的超分子超支化均聚物简单转化为基于AB + CD的超分子超支化交替共聚物的方法。在将带有竞争性中性客体部分（TAPN）和两个受体苯并-21-冠-7主体部分（B21C7）的CD单体添加到由二烷基铵盐（DAAS，A基团）功能化的柱[5]芳烃（MeP5，B基团）单体自组装构建的制备好的AB型超分子超支化均聚物后，初始均聚物结构被破坏，然后基于MeP5-TAPN和B21C7-DAAS之间的竞争性自分类相互作用重新组装成一种新的超分子超支化交替共聚物。这项研究提供了一种将超分子均聚物直接转化为超分子共聚物的简便方法。
