玻璃纤维增强PP性能、界面及基体晶态研究

本文通过扫描电镜、红外光谱、偏光显微、DSC分析和材料力学性能试验等方法考察了PP/玻纤的界面粘结性与其材料性能及基体结晶的关系.结果表明:在材料复合过程中加入的界面反应性试剂及其与PP接枝而形成的接枝物可与玻纤表面及其硅烷发生化学作用,促使玻纤表面树脂包覆层的形成,从而显着提高复合材料的界面粘结强度及其力学性能;复合材料试样成型过程中,因树脂冷却收缩而产生的界面应力可应变诱导玻纤周围基体树脂的结晶,促使其结晶形态和结晶度产生显着变化;而复合材料的界面粘结强度则是产生应变诱导作用和控制异相结晶的关键.

STUDIES ON THE PROPERTIES,THE INTERFACIAL SURFACE AND THE CRYSTALLINE MORPHOLOGY OF MATRIX OF CLASS FIBER-REINFORCED POLYPROPYLENE

The mechanical properties the crystallization of matrix of glass fiber-reinforeed PP aml their dependence on the interfacial, dhesion have been studied by using seamning electron microscope,infrarel spectrometer,material universal testing machine,polarizing microscope and DSC. etc.The results show that in the compounding process of glass fiber and PP,the added interfacal, reactive agents and the formed product from their grafting with PP cai react with the multilayer silicane coupling agent on the surface of glass fiber, and obviously increase the interfacial phase module,the interfacial bond strength and mechanical properties of the compocite.PP,Meanwhile,it was found that the produced interfacial stress from the contraction of the matix in injection molding can strain-induce the crystallization of matrix and leads to obvious change about the morphology and the crystallinity of matrix,and that the interfacial band strength is an im portant factor of producing the straininduced crystallization and controlling the strain-induced crystallization as well as controlling the multiphase crystallization.