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首页> 外文期刊>Nanotechnology >Self-assembled structures of hydrogen-bonded poly(vinyl chloride-g-4-vinyl pyridine) graft copolymers
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Self-assembled structures of hydrogen-bonded poly(vinyl chloride-g-4-vinyl pyridine) graft copolymers

机译：氢键合聚氯乙烯-g-4-乙烯基吡啶接枝共聚物的自组装结构

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摘要

An amphiphilic graft copolymer of poly(vinyl chloride-gra/M-vinyl pyridine), i.e., PVC-g-P4VP was synthesized via atom transfer radical polymerization (ATRP) and modified by introducing 1,5-dihydroxynaphthalene (DHN) as a hydrogen bonding donor to form hydrogen-bonded macromolecules. The PVC-g-P4VP graft copolymer prepared from a selective solvent for PVC, i.e., tetrahydrofuran (THF) exhibited a well-organized micellar morphology consisting of a P4VP core and a PVC corona. However, the graft copolymer prepared from a good solvent for both domains, i.e., N, N-dimethylformamide (DMF) showed a less-organized, random microphase-separated morphology. Upon the introduction of DHN, a more spherical morphology and a more-organized 'bicontinuous-like' morphology was observed in THF and DMF, respectively. This results from strong segregation between the two domains due to the enhanced interfacial energy by DHN. When DHN was removed by methanol, nanoporous films with versatile pore sizes and shapes were generated.
机译：聚（氯乙烯-gra / M-乙烯基吡啶）的两亲接枝共聚物，即PVC-g-P4VP，是通过原子转移自由基聚合（ATRP）合成的，并通过引入1,5-二羟基萘（DHN）作为氢进行改性结合供体以形成氢键结合的大分子。由用于PVC的选择性溶剂即四氢呋喃（THF）制备的PVC-g-P4VP接枝共聚物显示出由P4VP芯和PVC电晕组成的组织良好的胶束形态。但是，由用于两个区域的良好溶剂即N，N-二甲基甲酰胺（DMF）制得的接枝共聚物显示出组织较少，随机微相分离的形态。引入DHN后，分别在THF和DMF中观察到更球形的形态和更组织的“双连续状”形态。这是由于DHN增强了界面能，导致两个结构域之间强烈分离。当用甲醇除去DHN时，会生成具有多种孔径和形状的纳米多孔膜。

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