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首页> 外文期刊>RSC Advances >The synthesis and characterization of a processable polyrotaxane-based triblock copolymer via a “two steps” strategy
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The synthesis and characterization of a processable polyrotaxane-based triblock copolymer via a “two steps” strategy

机译：通过“两个步骤”策略的可加工聚甲烷基三嵌段共聚物的合成与表征

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摘要

A polyrotaxane based triblock copolymer (PR copolymer) was synthesized successfully via a “two steps” strategy. In the first step, a PR macroinitiator was synthesized by end-capping of an adamantane stopper (AD stopper). In second step, the PR copolymer was prepared via atom transfer radical polymerization (ATRP) with a PR macroinitiator. Furthermore, it was found the cyclodextrin (CD) content in the PR macroinitiator was controllable in the first step, whereas the degree of polymerization (DP) of butylmethacrylate (BMA) also appeared tunable in the second step. Moreover, the PR copolymer was processed into a self-standing film via solution casting and a nonwoven mat with good morphology via electrospinning. The strain–stress test showed the film had a higher tensile strength than universal plastics, and pure PBMA and dynamic mechanical analyzer results inferred that the movement of the PR block may be also present in the PR copolymer and have some influence on the copolymer's mechanical properties. In conclusion, the controllability of CD content and polymer chain length provide enough room to modify its molecular structure so as to design and synthesize different PR copolymers with various properties and broaden their application field from solution and hydrogels to the solid state.
机译：通过“两个步骤”策略成功地合成了聚映三烷基三嵌段共聚物（PR共聚物）。在第一步中，通过封端封端（Ad STOPPER）来合成PR显微引入剂。在第二步中，通过原子转移自由基聚合（ATRP）用PR显微引发剂制备PR共聚物。此外，发现在第一步骤中可控制PR甲酸吡嗪中的环糊精（CD）含量，而丁基丙烯酸丁酯（BMA）的聚合度（DP）也可在第二步骤中可调谐。此外，通过溶液浇铸和通过静电纺丝通过溶液浇铸和非织造垫将PR共聚物加工成自站式膜。应变应力测试显示薄膜的拉伸强度高于通用塑料，并且纯PBMA和动态机械分析仪的结果推断出PR块的运动也可以在PR共聚物中存在，并且对共聚物的机械性能产生一些影响。总之，Cd含量和聚合物链长的可控性提供足够的空间来改变其分子结构，以便设计和合成具有各种性质的不同公关共聚物，并从溶液和水凝胶拓宽其溶液和水凝胶到固态。

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