基于供受体作用力的聚合物共混行为研究
首发时间:2016-06-01
摘要:聚苯乙烯(PS)和聚甲基丙烯酸酯(PBMA)是典型的一对互不相容的高分子,我们通过RAFT聚合成功合成了侧链分别含芘苄胺基元的PS和含二硝基苯基元的PBMA,并通过核磁与凝胶渗透色谱(GPC)对聚合物分子量和官能度进行了表征。基于侧链芘卞胺与二硝基苯分子间的电子供受体相互作用,通过核磁、紫外和荧光表征了两种聚合物的相互作用,这种聚合物层面上的多价相互作用被证明是两者能够从互不相容到交联共混的基础。从扫描电镜(SEM)中两种聚合物的相分离的消失和差式量热扫描(DSC)中二者Tg的融合的现象均有力的证明了上述结论。
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Polymer Blending through Electron Donor-Acceptor Interactions
Abstract:A supramolecular network polymer consisting of a pair of immiscible polymers, poly(butyl)-methacrylate (PBMA) and polystyrene (PS), is described. A type of 3,5-dinitrobenzoic acid and pyrenemethylamine, which form a weak donor-acceptor interactions, are displayed at 9.1 and 14.2 mol % functional units along the main backbone of PBMA and PS, respectively. 1H-NMR, UV-Vis and Fluorescent measurements studies show donor-acceptor interactions between 3,5-dinitrobenzoic acid and pyrenemethylamine exclusively. This good fidelity, good affinity supramolecular connection of two different polymer coils at the molecular level produces a polymer blend. Blends containing mole percent of the recognition units were characterized by SEM and DSC experiments with no isolated domains observed and a single glass-transition temperature (Tg).
Keywords: supramolecular chemistry donor-acceptor interactions polymer blending
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