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采用熔融共混将煤矸石添加到线型低密度聚乙烯(LLDPE)中,利用同步热分析仪对复合材料的熔融、结晶、热降解行为进行研究。结果表明,升温速率为10K/min,煤矸石用量为30%时,LLDPE的熔融峰温和熔融峰宽均最低,较纯LLDPE分别降低了1.06%和11.76%。煤矸石的加入起到成核剂的作用,但阻碍了LLDPE晶粒的长大,结晶速率下降;升温速率为10K/min,煤矸石含量为30%时,最大失重速率较纯LLDPE提高了3.4%。
Coal gangue was added to linear low density polyethylene (LLDPE) by melt blending, and the melting, crystallization and thermal degradation behaviors of the composites were studied by synchronous thermal analyzer. The results showed that the melting peak temperature and melting peak width of LLDPE were the lowest when the heating rate was 10K / min and the amount of coal gangue was 30%, which was 1.06% and 11.76% lower than the pure LLDPE respectively. The addition of coal gangue played the role of nucleating agent, which hindered the growth of LLDPE grains and decreased the crystallization rate. When the heating rate was 10K / min and the gangue content was 30%, the maximum weight loss rate increased by 3.4 %.