PP/PET/MFIAA/HET原位成纤复合材料的力学性能与熔体流动性  

Mechanical Properties and Melt-flow Ability of PP/PET/MFIAA/HET In Situ Fiberized Composites

作　　者：刘俊[1] 谷琳[1] 赵典[1] 王经武[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450052

出　　处：《中国塑料》2008年第11期28-32,共5页China Plastics

摘　　要：研究了聚对苯二甲酸乙二醇酯(PET)含量、基体性质、成型加工温度对橡纤混杂型 PP/PET/多功能界面活化剂(MFIAA)/高效增韧剂(HET)原位成纤复合材料力学性能和熔体流动性的影响。结果表明,MFIAA、HET 用量不变,PET 含量增大,微纤的数量增加,长径比增大,复合材料的刚性提高,韧性有所降低;基体 PP 的熔体流动速率增大,有利于 PET 微纤在制品中的保持,基体熔体流动速率为16.2 g/10 mm时 ,复合材料的缺口冲击强度、拉伸强度和弯曲模量分别达到原料 PP 的3.49倍、99%和1.73倍,韧性显著提高的同时刚性保持率也很高;受熔体流动性和分散相形态的双重控制,PP/PET/MFIAA/HET 较为适宜的成型加工温度为(200±10)℃。PET 微纤是造成 PP/PET/MFIAA/HET 流动阻抗增加的主要原因,随着 PET 含量的增大,复合材料的熔体流动性急剧降低。Influence of the content of PET, properties of matrix, and processing temperature on the mechanical and rheological behavior of PP/PET/MFIAA/HET composites was studied. With PET content increased, the number and fine degree of PET microfibril increased, which resulted in higher rigidity of the composite but lower toughness. Using PP having a high melt flow rate as the matrix was very beneficial to maintain the microfibril morphology of in situ fiberized composite sample. When using a PP matrix with melt flow rate of 16.2 g/10 min, the notched Izod impact strength, tensile yield strength, and flexural modulus of PP/PET/MFIAA/HET with the matrix were 3.49,0.99, and 1.73 times, respectively, those of neat PP. Affected by both melt-flowability and morphology of the disperse phase, the optimum processing temperature for PP/PET/MFIAA/HET should be （200± 10） ℃. PET microfibril constituted the main reason of the composite melt flow resistance, increasing the content of PET microfibril, the melt-flow ability of PP/PET/MFIAA/HET falls rapidly.

关 键 词：原位成纤 聚丙烯 聚对苯二甲酸乙二醇酯 力学性能 熔体流动速率 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]