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合成了YB超分散剂并制备talc/PP复合材料。采用红外光谱(FT-IR)、差示扫描(DSC)、X衍射(XRD)和扫描电镜(SEM)等方法研究了复合材料的结晶行为和微观结构。结果表明:改性后的talc表面连接了新的有机基团;talc的加入具有异相成核作用,提高了PP结晶温度,但无晶型转变,当talc用量超过30%,异相成核作用减弱;超分散剂与talc存在异相成核协同作用,进一步提高结晶温度,并且对β晶型具有诱导效应,YB超分散剂加入,使部分α晶型向β晶型转变;同时使复合材料的冲击断面从脆性断裂转变为强韧性断裂。
YB hyperdispersant was synthesized and talc / PP composites were prepared. The crystallization behavior and microstructure of the composites were investigated by FT-IR, DSC, XRD and SEM. The results showed that the modified talc surface was connected with new organic groups. The addition of talc had the effect of heterogeneous nucleation and increased the crystallization temperature of PP, but no crystal transition. When the amount of talc was more than 30%, heterogeneous nucleation The role of weakened; hyperdispersant and talc heterogeneous nucleation synergies to further increase the crystallization temperature, and the induction of β-crystal effect, YB hyperdispersant added, so that part of α crystal β crystal transition; the same time make the composite The impact cross section of the material changes from brittle fracture to ductile fracture.