木质素改性LDPE复合泡沫材料性能与微观结构研究  

Study on Properties and Microstructure of LDPE/Lignin Foam Composites

作　　者：冯钠[1] 李季[1] 徐静[1] 颜东玺 麻馨予 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《塑料科技》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)

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.

关 键 词：木质素 低密度聚乙烯 泡沫材料 比强度 热稳定性 泡孔结构 

分 类 号：TQ328[化学工程—合成树脂塑料工业]