聚乙烯醇增强氯化聚乙烯-受阻酚阻尼复合材料的制备及其性能

Polyvinyl alcohol as reinforcement in damping composites consisting of chlorinated polyethylene and hindered phenol

为拓宽聚乙烯醇(PVA)的应用领域,以聚乙烯醇为增强体,氯化聚乙烯(CPE)和4,4′-甲撑双(2,6-二叔丁基苯酚)(AO 4426)的混合物为基体制备了一系列阻尼复合材料。借助动态热机械分析仪、差示扫描量热仪、傅里叶红外光谱仪、扫描电子显微镜和力学试验机对复合材料的性能和微观形态进行测试与表征。结果表明:添加PVA后复合材料仍保持CPE-AO 4426的双阻尼峰特性,且储能模量和阻尼温域内损耗模量曲线下的面积随PVA质量分数的增大而增大,表明复合材料的阻尼性能获得了较大的改善;PVA的羟基与AO 4426的羟基间形成了氢键,且随着PVA的添加使复合材料的断裂应力和应变均呈先上升后下降趋势。

A series of damping composites consisting of polyvinyl alcohol(PVA)acted as reinforcement and the mixture of chlorinated polyethylene(CPE)and 4,4′-methylene-bis-(2,6-dis-tert-butylph-enol)(AO 4426)acting as the matrix were prepared in order to broaden the application field of PVA.The properties and microstructure of the composites were measured and characterized by means of dynamic thermomechanical analyzer,differential thermal analyzer,Fourier infrared spectrometer,scanning electron microscope and mechanical test equipment.The results show that the composites still maintains characteristics of two damping peaks of CPE-AO 4426 composite after adding PVA,and the storage modulus and area under loss modulus curve at the damping temperature range of composites increased with the increase of PVA mass fraction,indicating that the damping performance of composites obtained greater improvement.The hydrogen bonds were formed between hydroxyl group of PVA and hydroxyl group of AO 4426.The fracture stress and the strain of the composite both demonstrate an increase and then a decrease with increase of PVA.