凹凸棒石／茂金属聚烯烃复合材料的结构与性能

研究了加工温度、偶联剂改性、增容剂KEOC－g－MAH等因素对凹凸棒石（AT）／聚烯烃热塑性弹性体（EOC）复合材料性能的影响。结果表明，加工温度越高，熔体粘度越低，AT的分散越不好；加入较高接枝率的增容剂EOC－g－MAH，用KH550处理的凹凸棒石对EOC的补强效果最好。当经KH550处理的凹凸棒石为10份，接枝率为0．89％的EOC－g－MAH为15份时，复合材料的100％拉伸模量、拉伸强度和撕裂分别比EOC弹性体提高104％、65％、25％。通过SEM、DSC、TEM分析表明，制备的AT／EOC复合材料是凹凸棒石微米尺寸分散的复合材料，AT未能分散形成纳米单晶，并且AT对EOC的结晶、熔融无明显影响。

Study on the Structure and Property of Attapulgite/Polyolefin Thermoplastic Elastomer Composties

Process temperature,coupling agent KH550-treated attapulgite and the use of compatibilizing agent maleic acid-grafted ethylene octane copolymer(EOC-g-MAH)on the properties of AT/EOC composites were studied.Experimental datum show that higher process temperature resulting in lower melting viscosity goes against the disperse of attapulgite,and that KH550-treated attapulgite can drastically enhance the properties of AT/EOC composites if EOC-g-MAH with the higher graft ratio is added at appropriate process temperature.When the contents of KH550-treated attapulgite and EOC-g-MAH is 10 % and 15 % respectively,compared with crude EOC,100 % tensile modulus,tensile strength and tear strength of AT/EOC composites increase by 104 %,65 %,25 % respectively.Analysis of SEM,TEM and DSC of AT/EOC composites showed that attapulgite still dispersed in a micrometer size in prepared AT/EOC composites,not at expected nanometer size,and it hardly affects on the crystallity and melting of EOC.