HDPE/钛酸钾晶须复合材料的制备与性能研究

Research and Application of HDPE/K_(2)O_(3)Ti Composites

利用双螺杆挤出制备了高密度聚乙烯(HDPE)/钛酸钾晶须(PTW)复合材料,研究了PTW不同填充量对HDPE复合材料性能的影响。结果表明:HDPE/PTW复合材料的弯曲模量和弯曲强度随PTW含量的增加而明显增加,拉伸强度略有增加,抗冲击强度有所降低,说明钛酸钾晶须对HDPE具有较好的增刚增韧作用。同时,PTW提高了材料的耐热性能,在PTW质量含量为25%,复合材料的负荷热变形温度提高了近20℃。另外,DSC分析表明,PTW对HDPE有结晶成核作用,结晶峰温度随PTW的增加而增加,在PTW质量含量为20%时,结晶峰温度提高了3.7℃。

High-density polyethylene(HDPE)/potassium titanate whisker(PTW)composites were prepared using twin screw extrusion,and the effect of different filling amounts of PTW on the properties of HDPE composites was studied.The results show that the flexural modulus and flexural strength of HDPE/PTW composites significantly increase with the increase of PTW content,while the tensile strength slightly increases and the impact strength decreases.This indicates that potassium titanate whiskers have a good effect on increasing stiffness and toughness of HDPE.At the same time,PTW has also improved the heat resistance of the material.At a PTW content of 25%,the load thermal deformation temperature of the composite material has increased by nearly 20℃.In addition,DSC analysis shows that PTW has a crystallization nucleation effect on HDPE,and the crystallization peak temperature increases with the increase of PTW.When the PTW content is 20%,the crystallization peak temperature increases by 3.7℃.