双组分解交联剂对废旧PU硬泡回收再利用的影响研究  

Effect of Two-component Decrosslinking Agent on Recycling and Reuse of Waste Polyurethane Rigid Foam

作　　者：顾晓华[1] 罗鸿翔 吕士伟 李燕 GU Xiaohua;LUO Hongxiang;LU Shiwei;LI Yan(School of Materials Science and Engineering, Qiqihar University,Qiqihar 161006, China)

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006

出　　处：《中国塑料》2019年第5期89-93,共5页China Plastics

基　　金：黑龙江省教育厅项目(135109214);齐齐哈尔市科技局项目(GYGG-201504)

摘　　要：利用醇胺法对废旧聚氨酯(PU)硬质泡沫进行降解,并利用得到的低聚物多元醇制备出合格的PU硬质泡沫。对再生低聚物多元醇进行黏度、羟值测定,对泡沫样品进行红外光谱、密度、吸水率、热失重、偏光显微镜等分析。结果表明,DEG∶ETA=1∶3(质量比,下同)时,降解产物的结构与PU原料聚醚4110极为相似,可将其替代,以此可制备出密度为35 kg/m^3、吸水率为0.016 g/cm^3、压缩强度为0.23 MPa、导热系数为0.021 6 W/m·K的PU泡沫样品,性能达到国家标准。The waste polyurethane (PU) rigid foam was degraded by an alcohol-amine method, and then the renewed PU rigid foam was prepared by using recycled oligomer polyol. The viscosity and hydroxyl value of the recycled oligomer polyols were evaluated, and the resulting foam samples were analyzed by means of Fourier-transform infrared spectroscopy, density, water absorption, thermogravimetric analysis and polarized light microscopy. The results indicated that the chemical structure of the degradation product was quite similar to that of polyether 4110, a raw material for PU, at a DEG/ETA mass ratio of 1/3. The renewed foam samples exhibited a density of 35 kg/m3, water absorption of 0.016 g/cm^3, compressive strength of 0.23 MPa and thermal conductivity of 0.021 6 W/m·K, which met the requirement for the national standards regarding PU foam.

关 键 词：聚氨酯 回收 解交联剂 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]