论文部分内容阅读
采用模压发泡法制备了低密度聚乙烯/纳米碳酸钙(LDPE/nano-CaCO3)复合发泡材料。研究不同含量的nano-CaCO3、发泡剂AC、交联剂DCP等对LDPE/nano-CaCO3力学性能及发泡效果的影响,确定了最佳工艺路线。结果表明:随着nano-CaCO3用量的增加,LDPE/nano-CaCO3复合发泡材料拉伸强度和表观密度逐渐增大,发泡倍率逐渐减小。当nano-CaCO3用量为30%,AC用量为9%～11%,DCP用量为0.08%时,发泡材料的综合性能最佳。热重分析表明:加入nano-CaCO3后,LDPE发泡材料的热稳定性得到提高。
Low density polyethylene / nano calcium carbonate (LDPE / nano-CaCO3) composite foams were prepared by compression molding. The effects of different content of nano-CaCO3, foaming agent AC, cross-linking agent DCP on the mechanical properties and foaming effect of LDPE / nano-CaCO3 were studied and the optimum technological route was determined. The results showed that the tensile strength and apparent density of LDPE / nano-CaCO3 composite foam gradually increase with the increase of the amount of nano-CaCO3, and the foaming ratio decreases gradually. When the amount of nano-CaCO3 is 30%, the amount of AC is 9% ~ 11%, the dosage of DCP is 0.08%, the best performance of the foam material. Thermogravimetric analysis showed that the thermal stability of LDPE foamed material increased with the addition of nano-CaCO3.