乙烯-乙酸乙烯酯共聚物/纳米碳酸钙复合发泡材料的制备与研究

Research on Preparation Technology and Performance of EVA/Nano-CaCO_3 Foam Composites

采用模压发泡法制备了乙烯-乙酸乙烯酯共聚物（EVA）/纳米碳酸钙（nano-CaCO3）复合发泡材料.研究了添加不同质量分数的nano-CaCO3、发泡剂偶氮二甲酰胺（AC）、交联剂过氧化二异丙苯（DCP）等对EVA/nano-CaCO3复合发泡材料发泡性能的影响；重点研究了不同质量分数的nano-CaCO3对复合发泡材料的力学性能和发泡形态的影响.结果表明：AC添加质量分数为9％、DCP添加质量分数为1.0％、nano-CaCO3添加质量分数为15％左右时,所得EVA/nano-CaCO3复合发泡材料的综合性能最佳.扫描电镜研究结果表明：nano-CaCO3添加质量分数为0～15％时,可以明显地提高复合发泡材料泡孔尺寸的均匀性,泡孔变小,气泡个数增加；当其添加质量分数大于15％后,泡孔容易出现坍陷,泡孔变大.

EVAJnano-CaCO3 foam composites were prepared through molded foam method. The influence of diffe- rent contents of blowing agent AC, cross linking agent DCP arid nano-CaCO3 on the foaming effect of EVA/nano--CaCO3 foam composites were studied. At the same time, the effect of different contents of nano-CaCO3 on the mechanical properties and foaming form were discussed. The results show that： when the contents of AC, DCP and nano-CaCO3 are 9%, 1%, 15% respectively, the comprehensive performances of the foam composites are optimal. The SEM indicates that： when the contents of nano--CaCO3 at 0- 15%, Can significantly improve the bubble hole size uniformity, reduce bubble hole size and increase bubble numbers; when filling quantity is higher than 15%, bubble hole is easy to appear slump and bubble hole becomes bigger.