摘要
采用模压发泡法制备了木质素改性低密度聚乙烯(LDPE)复合泡沫材料,研究了木质素对泡沫材料物理力学性能、热稳定性和泡孔微观结构的影响。力学性能分析表明:随着木质素用量的增加,泡沫材料的表观密度逐渐降低;比强度则先升高后降低,当木质素用量为5 phr时,比强度达到最大值9.96 MPa cm3/g,提高了约92.6%。TG分析表明,当木质素用量大于10 phr时,可以有效改善并提高LDPE复合泡沫材料的热稳定性和残炭量。SEM及Nano-measure分析表明,木质素使得LDPE复合泡沫材料泡孔分布均匀且细密,平均尺寸均为40μm左右,复合材料的发泡性能有所提高。
Low-density polyethylene （LDPE）/lignin foam composites were prepared through molding foaming technology. Physical and mechanical properties, thermal stability and microstructure of LDPE/lignin foam composites were studied. The analysis of mechanical properties shows that the apparent density gradually reduces and the specific strength increases first and then decreases with the increase of lignin content. While the amount of lignin is 5 phr, the highest specific strength is 9.96 MPa-cm3/g, which increased by 92.6%. TG analysis shows that lignin can effectively improve the thermal stability and increase carbon residue of LDPE/lignin foam composites when the amount is greater than 10 phr. SEM and Nano-measure analysis show that the foam cell of LDPE/lignin foam composites is uniform and fine distribution, the average size is about 40 Lure, that means the foaming performance improves.
出处
《塑料科技》
CAS
北大核心
2015年第5期61-64,共4页
Plastics Science and Technology
基金
国家自然科学基金资助项目(21276034)
作者简介
冯钠（1964-），女，吉林长春人，教授．主要从事高分子材料成型加工研究。fengna12@163．com
