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采用聚丙烯酸正丁酯(PBA)改性的丁苯(SBR)胶乳为种子乳液(SBA),通过乳液接枝共聚氯乙烯制备了SBA/PVC复合树脂.通过粒径分析仪、动态力学分析仪(DMA)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)等测试手段,表征了复合胶乳粒的粒径与形态,以及材料的形态结构.粒径分析表明PVC确实包覆在SBA上;TEM研究结果显示SBA/PVC胶乳粒子呈现明显的核壳结构,PBA加入可提高SBR在复合材料中的分散性;DMA分析表明SBA/PVC复合树脂在低温区呈现了一个宽而弱的转变峰,揭示了接枝过渡层的微观结构特征;研究了交联剂和PBA用量对材料性能的影响,结果表明在PBA含量较低时,SBA/PVC复合树脂就显示了优良的冲击性能,且SEM照片显示材料断面形貌为特征性韧性断裂.
The SBA / PVC composite resin was prepared by emulsion copolymerization of vinyl chloride with poly (n-butyl acrylate) (SBR) latex as seed emulsion (SBA) (DMA), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to characterize the particle size and morphology of the composite latex particles as well as the morphological structure of the materials.The particle size analysis showed that PVC was indeed coated on the SBA ; TEM results show that the SBA / PVC latex particles showed a clear core-shell structure, PBA can increase SBR dispersion in the composite material; DMA analysis showed that SBA / PVC composite resin in the low temperature region showed a wide and weak transition peak , Revealing the microstructure of grafted transition layer; studied the crosslinking agent and the amount of PBA on the material properties of the results showed that the PBA content is low, the SBA / PVC composite resin showed excellent impact properties, and SEM The photograph shows the cross-section of the material as a characteristic ductile fracture.