PP复合材料的性能研究  

Study on Toughening and Strengthening Properties of Polypropylene Composites

作　　者：丁将敏 王芳 田敬晓 刘艳丽 DING Jiang-min;WANG Fang;TIAN Jing-xiao;LIU Yan-li(Institute of Coal Chemical and Industry Technology,Ningxia Coal Co.Ltd,China Energy,Yinchuan 750411,Ningxia,China)

机构地区：[1]国家能源集团宁夏煤业公司煤炭化学工业技术研究院,宁夏银川750411

出　　处：《合成材料老化与应用》2024年第2期10-13,共4页Synthetic Materials Aging and Application

摘　　要：通过添加改性碳酸钙、POE、玻璃纤维、碳纤维研究其对PP复合材料性能的影响。研究表明:随着改性CaCO3含量的逐渐增加,PP复合材料的拉伸强度和冲击强度呈先增后减的趋势,改性CaCO3添加量为2%(wt.)时,拉伸强度为23.7MPa,冲击强度为17kJ·m^(-2);随着POE添加量的增加,复合材料的拉伸强度和弯曲模量降低,冲击强度增大,当POE添加量超过17%(wt.)时,冲击强度增幅减缓,综合力学性能及经济性,确定POE的添加量为17%~20%(wt.);添加玻璃纤维后,复合材料的拉伸强度、弯曲模量是增加的,冲击强度明显下降,但当玻璃纤维添加量为10%(wt.)以上,复合材料的拉伸强度和弯曲模量是逐渐增大的,冲击强度明显下降。通过复合材料冲击断面SEM表征发现:断面粗糙,有较多的片状结构,部分可见明显的“拉丝”形态,是典型的韧性断裂特征;玻璃纤维和碳纤维集束在树脂基体中随机取向分布,形成了足够的骨架网络,起到增强增韧作用。In this paper,the effects of modified calcium carbonate,POE,glass fiber and carbon fiber on the properties of PP composites were studied.The results show that with the gradual increase of modified CaCO3 content,the tensile strength and impact strength of PP composites increase first and then decrease.When the modified CaCO3 content is 2wt%,the tensile strength is 23.7 MPa and the impact strength is 17 kJ·m^(-2).With the increase of POE addition,the tensile strength and bending modulus of the composite decrease,while the impact strength increases.When the addition of POE exceeds 17wt%,the increase of impact strength slows down.Considering the mechanical properties and economy,the addition of POE is determined to be 17wt%·20wt%.After the addition of glass fiber,the tensile strength and bending modulus of the composite are increased,and the impact strength is significantly decreased.However,when the addition of glass fiber is more than 10wt%,the tensile strength and bending modulus of the composite are gradually increased,and the impact strength is significantly decreased.It is found by SEM that the impact section of composite material is rough,there are more sheet structures,and some of them can be seen obvious"wire drawing"shape,which is a typical ductile fracture feature.The glass fiber and carbon fiber are distributed randomly in the resin matrix,forming enough skeleton network to strengthen and toughen.

关 键 词：聚丙烯 玻璃纤维 碳纤维 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]