中国塑料 ›› 2019, Vol. 33 ›› Issue (10): 84-88.DOI: 10.19491/j.issn.1001-9278.2019.10.015

• 塑料与环境 • 上一篇    下一篇

小分子醇对废旧PU硬泡回收再利用的影响研究

顾晓华1,吕士伟1,张晓华2,罗鸿翔1   

  1. 1. 齐齐哈尔大学
    2. 大庆油田庆升实业公司
  • 收稿日期:2019-05-13 修回日期:2019-06-24 出版日期:2019-10-26 发布日期:2019-10-25
  • 基金资助:

    黑龙江省教育厅项目(135109214)、齐齐哈尔市科技局项目(GYGG-201902)

Effect of Small Molecule Alcohol on Recovery and Recycling of Waste PU Hard Foam

GU Xiaohua1,LYU Shiwei1,ZHANG Xiaohua2, LUO Hongxiang1   

  1. 1.Qiqihar University,Qiqihar 161006,China; 2.Daging Oilfield Construction Group Qingsheng Real Estate Company,Daqing163712,China
  • Received:2019-05-13 Revised:2019-06-24 Online:2019-10-26 Published:2019-10-25
  • Contact: LYU Shiwei E-mail:599848533@qq.com

摘要: 对废旧聚氨酯硬泡进行降解可得到多元醇,使其与催化剂、聚醚、稳泡剂混合制备成白料,再与黑料异氰酸酯均匀混合,可以得到再生硬质聚氨酯(PU)泡沫材料,实现回收再利用。研究了双组分小分子醇的添加量对降解料的影响规律,以及添加剂对硬质PU泡沫强度的影响。对制备的硬质PU泡沫进行黏度、强度、吸水率、热稳定性、偏光显微镜、红外光谱、热失重等性能的测试分析。结果表明,聚醚多元醇4110∶乙二醇=(50∶30)时为最佳的工艺条件,此时可以制备出抗压强度为133.3 kPa,吸水率为0.552 5 %,导热系数为0.015 19 W/(m·K),密度为37 kg/cm3的再生硬质PU泡沫,其性能指标都能达到国家标准。

关键词: 聚氨酯泡沫, 小分子醇, 醇解, 发泡

Abstract: Polyol could be obtained from degradation of waste polyurethane (PU) foam and then mixed with polyether, a catalyst and a foam stabilizer to form a series of oligomers. Subsequently, these oligomers could be mixed with isocyanate to prepare a type of recycled rigid polyurethane foam for reuse. In this paper, we investigated the effect of addition amounts of two-component small molecule alcohol on the degraded material and the effect of additives on the strength of the rigid PU foam. The morphology, viscosity, strength, water absorption and thermal stability of the PU foam were investigated by polarizing light microscopy, FTIR, TGA. The results indicated that the optimum process condition for preparation of the rigid PU foam was determined as the polyether polyol 4110/ethylene glycol weight ratio of 50/30, and the resultant PU form achieved the compressive strength of 133.3 kPa, a water absorption of 0.552 5 %, a thermal conductivity of 0.015 19 W/(m·K) and a density of 37 kg/cm3. The rigid PU foam developed by this work presented the comprehensive performance in accord with the national standards.

Key words: polyurethane foam, small molecule alcohol, alcoholysis, foaming

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