玻璃纤维增强PP性能、界面及基体晶态研究

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

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，从而显著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著变化；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。

The mechanical properties、the crystallization of matrix ofglass fiber-reinforced PP and their dependence on the interfacial adhesion have been studied by using,ssanning electron microscope,infrared spectrome-ter,material universal testing machine, polarizing microscope and DSC. etc.The results show that in the compounding process of glass fiber andPP,the added interfacial reactive agents and the formed product from theirgrdmfting xith PP can react with the multilayer silicane coupling agent onthe sttrface of gl ass fiber,and obviously increase the interfacial phasemodule,thfe interfacial bond;trength and mechanical properties of the com-pooite .Meanwhile it was found that the produced interfacial stress fromthe contraction of the matix in injectio、molding can strain-induce the crys-tallization of matrix and leads to obvious change about the morphology and the crystallinity of matrix,and that the,interfacial bond strength is an imp-ortant fanctor of producing the straininduced crystallization and controlling the strain-induced crystallization as well as controlling the multiphase crystallization .