纳米改性β-晶聚丙烯高性能材料的制备及性能研究  

Study on Preparation and Properties of Nano Modif icationβ-Crystalline Polypropylene High-performance Materials

作　　者：康少冉 马乐波 闫鹏 马维 KANG Shao-ran;MA Le-bo;YAN Peng;MA Wei(Ningxia Shenyao Technology Co.,Ltd.,Yinchuan 750004,China)

机构地区：[1]宁夏神耀科技有限责任公司,宁夏银川750004

出　　处：《化工管理》2023年第16期145-147,共3页Chemical Engineering Management

摘　　要：文章通过添加β成核剂母粒和纳米CaCO3对普通均聚聚丙烯PPH进行协同改性,通过双螺杆挤出机对混合料进行熔融分散剪切,在熔融状态下通过纳米粉体对高分子材料的晶型进行干涉重构,形成α晶和β晶共存的状态,提高材料的韧性和耐温强度,实现改性材料的高刚高韧性。改性后材料的拉伸强度达到32.6 MPa,简支梁缺口冲击强度达到76.7 kJ/m^(2),拉伸屈服应变为11.2%,负荷热变形温度为106℃,较常规的聚丙烯性能有明显提升。This article is written by addingβNucleating agent masterbatch and nano-CaCO3 are used to synergistically modify ordinary homopolymer polypropylene PPH.The mixture is melted,dispersed and sheared by a twin-screw extruder.In the melting state,the crystal form of the polymer material is reconstructed by interference of nano-sized powder to formαcrystal andβin the state of crystal coexistence,the toughness and temperature resistance of the material are improved,and the high rigidity and toughness of the modif ied material are realized.The tensile strength of the modif ied material reached 32.6 MPa,the notched impact strength of the simply supported beam reached 76.7 kJ/m^(2),the tensile yield strain was 11.2%,and the thermal deformation temperature under load was 106℃.Compared with the conventional polypropylene,the properties of the modif ied material were signif icantly improved.

关 键 词：纳米改性 Β晶型 高刚高韧 耐温 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]