煤矸石/SBS复合材料的制备与性能研究
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摘要
煤矸石是采煤和选煤过程中所产生的工业废料,大量排放的煤矸石对环境和人体健康都有一定的危害。本论文采用廉价废弃物煤矸石作原料,通过粉碎筛分,偶联剂表面改性制成了一种高分子聚合物的补强填料,用它对热塑性弹性体-热塑性丁苯橡胶(SBS)进行补强,能够提高SBS的力学性能、耐热性等性能,既可以利用废物,又能降低橡胶制品的价格,具有明显的经济效益和社会效益。
     本课题采用硅烷偶联剂、钛酸酯偶联剂和铝酸酯偶联剂对不同粒径的煤矸石进行了表面改性,通过红外光谱、扫描电子显微镜显示在改性后的煤矸石表面覆盖了偶联剂分子,并对偶联机理进行了讨论。
     本论文对不同偶联剂改性不同粒径煤矸石/SBS复合材料的性能进行了对比,结果表明,200克SBS添加4mL钛酸酯偶联剂改性20克250目煤矸石复合材料的性能最佳,其中拉伸强度达到11.35Mpa,较纯SBS(6.6Mpa)提高了近2倍,而抗老化性能、耐摩擦性能都有明显提高。热分析表明,煤矸石/SBS复合材料的软化点和初始分解温度均较纯SBS有所提高,其中以钛酸酯偶联剂改性250目煤矸石复合材料最佳。
Coal gangue is an industrial solid waste produced during the processing of coal mining and mineral processing. The coal gangue not only takes up the land of large quantity, but pollutes the circumstance and endanger the health of human body.Using coal gangue as raw material, a kind of new type polymer reinforcing filler for thermoplastic elastomer–polystyrene-butadiene rubber(SBS) has been made by ultra-fine grinding and surface treatment and the properties of mechanics and resisting heat could be improved. Which not only make use of waste material bu also reduce the price of rubber product, and which have economic and social benefits.
     The coal gangue were modified with silance coupling agent、titanate alkoxide coupling agent and aluminate coupling agent in this paper. The result showed the surface of coal gangue is covered with organic coupling agent molecular by IR、SEM and the mechanism of coupling is discussed.
     The properties of composites different coupling agent modificative coal gangue/SBS were compared in my paper,which indicated the composites of 4mL titanate alkoxide coupling agent modificative 20g 250 eyes coal gangue accessing 200g SBS is the best, the tensile strength achieved 11.35Mpa and it enhanced double than pure SBS. Moreover properties of resisting aging and resisting fuection were enhanced. The thermic analysis showed the intenerated point and decompound temperature of coal gangue/SBS composites enhanced than pure SBS and the composites of titanate alkoxide coupling agent modificative coal gangue is the best.
引文
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