SBS及SBS-MAH改性PS/纳米CaCO_3复合材料的研究  

STUDIES ON THE SBS AND SBS-MAH MODIFIED PS/NANO-CaCO_3 COMPOSITES

作　　者：李谷[1] 麦堪成[1] 王玉海[1] 冯开才[1] 

机构地区：[1]教育部聚合物复合材料及功能材料重点实验室中山大学化学与化学工程学院,广东广州510275

出　　处：《高分子材料科学与工程》2006年第2期227-230,共4页Polymer Materials Science & Engineering

基　　金：广东省自然科学基金重点资助项目(021731)

摘　　要：将嵌段热塑性弹性体SBS与PS及纳米C aCO3熔融复合以增韧PS及PS/纳米C aCO3复合材料。结果显示:在含5 phr纳米C aCO3的PS/纳米C aCO3复合材料中加入不同比例的SBS后,随SBS含量增加,复合材料的缺口冲击强度及无缺口冲击强度均增加,复合材料的缺口敏感性及拉伸强度下降,断裂伸长率则成倍增加,材料在达到挠度3.2 mm时不发生弯曲断裂现象,显示出SBS对PS良好的增韧效果。M AH对SBS的接枝改性有助于进一步提高PS/SBS/纳米C aCO3复合材料的拉伸强度及弯曲强度。电镜照片显示纳米C aCO3在PS基体中主要呈微米分散状态,SBS的加入有助C aCO3纳米分散程度的提高。Styrene-butadiene-styrene triblock copolymer （SBS） and its maleic anhydride （MAH） grafted polymer were blended with polystyrene （PS） and nanometer calcium carbonate to toughen the brittle PS. The results show that the notched and non-notched impact strength of PS/SBS/nano-CaCO3 composites increase with the SBS content, but the tensile strength and the notched sensitivity for the composites decrease at meantime. The elongation at break doubles compared with PS, and the composites do not ruptured at 3. 2 mm deflction for the SBS toughened composites. The SBS-MAH did some help to improved the tensile strength and the flexural strength of PS/SBS /nano-CaCO3 composites due to the stable interaction between the polar MAH and the nano-CaCO3. The scanning electron microscope （SEM） photograph indicates that the nano-CaCO3 disperses in PS matrix mainly in micrometer degree, and the SBS can enhance the nanometer dispersive degree of nano-CaCO3 to some extent.

关 键 词：聚苯乙烯 SBS 纳米CACO3 冲击强度 增韧 

分 类 号：TB383[一般工业技术—材料科学与工程]