PS/POE/功能化石墨烯纳米复合材料的制备和性能研究  

Preparation and performance of PS/POE/functionalized graphene nanocomposites

作　　者：李丝丝 周强[1] 谭禅 蔺海兰[1] 何飞雄[1] 卞军[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《弹性体》2014年第6期7-13,共7页China Elastomerics

基　　金：教育部春晖合作计划基金项目(Z2010097);汽车高性能材料及成形技术四川省高校重点实验室开放研究基金项目(szjj2014-054);西华大学"青年学者培养计划"基金(01201404);西华大学"西华杯"大学生创新基金(2014060;2014061)

摘　　要：利用马来酸酐接枝聚烯烃（POE-g-MAH）弹性体为增韧剂,乙二胺功能化石墨烯（G-EDA）为纳米填料,经熔融共混法制备了聚苯乙烯（PS）/POE-g-MAH/G-EDA纳米复合材料,并对填料和所得纳米复合材料的结构和性能进行了全面的表征。红外光谱（FTIR）、扫描电子显微镜（SEM）、力学性能、维卡软化温度和熔融指数测试表明：乙二胺（EDA）已成功接枝于石墨烯的表面上;共混过程中,POE-g-MAH的酐基与EDA的氨基发生反应改善了共混体系的界面相容性;G-EDA在熔融共混过程中均匀分散于PS基体中;随着G-EDA含量的增加,复合材料的拉伸强度先增大后降低,当G-EDA质量分数为0.5%时,复合材料的拉伸强度达到最大值,比PS/POE-g-MAH提高了12.3%,比纯PS提高了15.5%;而当G-EDA质量分数为0.75%时,复合材料的冲击强度达到最大值,比PS/POE-g-MAH提高了22%,比纯PS提高了22.4%。因此,当G-EDA的质量分数在0.5%-0.75%之间时,复合材料的综合力学性能最好。G-EDA的加入,纳米复合材料的邵氏A硬度、维卡软化温度等都逐渐增大,而熔融指数逐渐降低。Using maleic anhydride grafted polyolefin elastomer（POE-g-MAH）（as toughening agent）,ethylenediamine functionalized graphene（G-EDA）（as nano-filler）,the PS/POE-g-MAH/GEDA nanocomposites were prepared by melt blending method.The morphology and properties of nanofiller and the resultant nanocomposites have been characterized in detail by means of Fourier transform infrared spectroscopy（FTIR）,Scanning electron microscope（SEM）,mechanical properties,Vicat softening temperature and melt flow rate tests.The results indicated that EDA was successfully grafted onto GS.The reactions between the G-EDA and POE-g-MAH have been taken place during the blending process,which improved effectively the interfacial interactions of blending systems.G-EDA has been dispersed well in the matrix;The tensile strength of the nanocomposites increased firstly and then decreased with increasing G-EDA content,and reached a maximum value at the 0.5wt.% G-EDA content,which is improved 12.3% compared with PS/POE-g-MAH and 15.5% with pure PS;while the impact strength reached a maximum value at the 0.75 wt.% G-EDA content,which is improved 22%compared with PS/POE-g-MAH and 22.4% with pure PS.In summary,the comprehensive mechanical performance could be obtained when the G-EDA content was in the range of 0.5-0.75 wt.%in the PS/POE-g-MAH/G-EDA nanocomposites.Furthermore,with increasing of G-EDA content,the hardness and Vicat softening temperature of the nanocomposites increased,while the melt flow rate decreased gradually.

关 键 词：聚苯乙烯(PS) POE-G-MAH 石墨烯 纳米复合材料 界面 性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]