摘要
以过氧化二异丙苯为引发剂,甲基丙烯酸缩水甘油脂(GMA)和马来酸酐接枝聚乙烯(PE-g-MAH)组成协同增容体系,通过动态硫化法制备了废旧轮胎胶粉(GTR)/高密度聚乙烯(PE–HD)热塑性弹性体。研究了PE-g-MAH添加量一定时,GMA用量对GTR/PE–HD热塑性弹性体力学性能、结晶性能和微观形貌等方面的影响。结果显示,添加0.5份GMA,10份PE-g-MAH时,制备的GTR/PE–HD热塑性弹性体综合力学性能最佳,其中拉伸强度为12.82 MPa,断裂伸长率为341.61%,撕裂强度为78.08 kN/m。傅立叶变换红外光谱测试结果表明,GMA上的环氧基团与GTR表面的羧基能发生反应生成酯基。扫描电子显微镜微观形貌表征结果表明,改性后试样断面更加不规整,发生了明显的塑性变形,在两相界面处出现“拉丝”现象。差示扫描量热分析结果表明,随GMA用量增加,熔融温度和结晶温度基本不变,熔融焓和结晶度逐渐降低。
Ground tire rubber(GTR)/high density polyethylene(PE–HD)thermoplastic elastomer was prepared by dynamic vulcanization with DCP as initiator,glycidyl methacrylate(GMA)and PE-g-MAH as synergistic compatibilizing system.The effect of the content of GMA on the mechanical properties,crystallinity and micro morphology of GTR/PE–HD thermoplastic elastomer with a certain amount of PE-g-MAH was studied.The results showed that when 0.5 phr GMA and 10 phr PE-g-MAH were added,the comprehensive mechanical properties of GTR/PE–HD thermoplastic elastomer were the best,including tensile strength of 12.82 MPa,elongation at break of 341.61%,tear strength of 78.08 kN/m.FTIR test showed that the epoxy group on GMA could react with the carboxyl group on GTR surface to form ester group.The microscopic morphology of GTR/PE–HD thermoplastic elastomer was characterized by scanning electron microscopy.The cross-section of the modified sample was more irregular,and there was obvious plastic deformation and“drawing”phenomenon appeared at the interface of two phases.The crystallinity of GTR/PE–HD thermoplastic elastomer was studied by DSC.With the increase of GMA content,the melting temperature and crystallization temperature were remained unchanged,and the melting enthalpy and crystallinity decreased gradually.
作者
于新颖
王泽宇
李迎春
王文生
舒落生
Yu Xinying;Wang Zeyu;Li Yingchun;Wang Wensheng;Shu Luosheng(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;Taiyuan Technology Transfer Promotion Center,Taiyuan 030051,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第8期130-134,143,共6页
Engineering Plastics Application
