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以超细橡胶粒子与有机磷酸盐成核剂复配的方法制备了一种新型复合成核剂,通过示差扫描量热法(DSC)比较了复合成核剂改性PP以及有机磷酸盐成核剂改性PP的结晶温度、等温结晶行为及等温结晶动力学;利用扫描电子显微镜(SEM)的能谱附件和透射电子显微镜(TEM)研究了复合成核剂的微观形态及其在PP中的分散情况.研究结果表明,复合成核剂中超细橡胶粒子作为载体使有机磷酸盐成核剂附着在其表面,提高了成核剂在聚丙烯中的分散性,因而提高了成核剂的成核效率,当成核剂用量较小时,即可明显提高PP的结晶速率和力学性能.
A new type of composite nucleating agent was prepared by compounding ultrafine rubber particles with organic phosphate nucleating agent. The properties of composite nucleating agent modified PP and organic phosphate nucleation were compared by differential scanning calorimetry (DSC) The crystallization temperature, isothermal crystallization behavior and isothermal crystallization kinetics of the modified PP were studied. The microscopic morphology of the composite nucleating agent and its effect in PP were studied by means of energy dispersive spectroscopy and transmission electron microscopy (TEM) with scanning electron microscopy (SEM) Dispersion.The results show that the composite nucleating agent ultrafine rubber particles as a carrier to the organophosphate nucleating agent attached to the surface and improve the nucleating agent in the polypropylene dispersion and thus improve the nucleating agent Nucleation efficiency, when the amount of nucleating agent is small, can significantly improve the crystallization rate and mechanical properties of PP.