芳纶纤维增强酚醛泡沫的性能  

Performance of Aramid Fiber Reinforced Phenolic Foam

作　　者：孙洁[1] 李华强[1] 冯古雨 钱坤[1] 曹海建[1] 

机构地区：[1]江南大学生态纺织教育部重点实验室,江苏无锡214122

出　　处：《塑料》2015年第4期83-86,100,共5页Plastics

基　　金：国家自然科学基金青年基金(51302110);中央高校基本科研业务费专项基金(JUSRP1044)

摘　　要：分别选用芳纶短切纤维和芳纶浆粕纤维作为填充材料增强酚醛泡沫,通过压缩力学性能测试、断面微观形貌观察以及热失重等表征手段,考察了芳纶纤维增强酚醛泡沫的效果,对比分析了两种纤维及其用量对酚醛泡沫改性效果的影响。结果表明:芳纶纤维可以有效地增强酚醛泡沫的压缩性能,从压缩应力-应变曲线看,芳纶短切纤维增强的样品其屈服区长度普遍略长于芳纶浆粕纤维增强的样品,表明前者具有略优的缓冲性能和吸能性能;纤维种类对泡沫截面形貌产生影响,芳纶浆粕纤维增强的泡沫胞体完整程度明显优于芳纶短切纤增强的样品;添加芳纶纤维还有利于提高泡沫复合材料的热稳定性,以芳纶短切纤维对材料在高温条件下(>400℃)热稳定性的增强效果更为明显。Chopped aramid fibers and aramid-pulp fibers were chosen as padding materials respectively to reinforce phenolic foams. The reinforcement effects and the differences between the two aramid short fibers and fiber loadings were investigated through compression mechanical property test, SEM micro-morphology images and thermo gravimetric analysis. It showed that the compression behavior of phenolic foams could be effectively improved by adding the two aramid short fibers. The relative longer stress plateau for chopped fiber reinforced phenolic foams with respect to the pulp fiber reinforced onesas seen in the compression stress-strain curves showed that the former foam composite might have better energy absorption performance and buffer performance. The fiber characteristic had an influence on the morphology of the foam＇ s failure section, more collapsed cells could be observed on the cross section SEM image of the chopped fiber reinforced sample compared with the pulp fiber reinforced one. In addition, adding aramid short fibers was also helpful for improving the thermal stability of phenolic foams, especially for the high temperature（ over 400 ℃ ） thermalstability by adding chopped fibers.

关 键 词：酚醛泡沫 芳纶浆粕纤维 芳纶短切纤维 增强 压缩性能 热稳定性 

分 类 号：TQ328.9[化学工程—合成树脂塑料工业]