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以γ-氨丙基三乙氧基硅烷(KH550)和正硅酸乙酯(TEOS)为SiO_2前躯体,利用KH550和TEOS的原位溶胶-凝胶反应,制备SiO_2杂化改性氯化聚氯乙烯(CPVC)树脂。采用傅里叶变换红外光谱仪(FTIR)、X射线能谱仪(EDS)以及扫描电子显微镜(SEM)表征了改性CPVC的化学结构和微观形貌;并采用热失重分析仪(TGA)和差示扫描量热仪(DSC)对改性前后树脂的热性能进行了分析。结果表明:SiO_2与CPVC发生了杂化,且杂化后树脂的粒径减小;改性后CPVC树脂的耐热性能得到显著提高,分子链运动受到杂化网络限制,玻璃化转变温度和熔点均有所提高。
In situ sol-gel reaction of KH550 and TEOS with γ-aminopropyltriethoxysilane (KH550) and tetraethoxysilane (TEOS) as precursors, SiO 2 hybrid modified chlorinated polychlorinated Ethylene (CPVC) resin. The chemical structure and morphology of modified CPVC were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (EDS) and scanning electron microscopy (SEM). The thermal degradation weight analyzer (TGA) Scanning calorimetry (DSC) was used to analyze the thermal properties of the resin before and after modification. The results show that the hybrid of SiO 2 and CPVC is hybridized, and the particle size of the resin decreases after the hybridization. The heat resistance of the CPVC resin increases remarkably after the modification. The molecular chain movement is limited by the hybrid network. The glass transition temperature and the melting point Have improved.