中国塑料 ›› 2025, Vol. 39 ›› Issue (1): 92-96.DOI: 10.19491/j.issn.1001-9278.2025.01.015

• 塑料与环境 • 上一篇    下一篇

废弃聚异氰脲酸酯泡沫塑料的降解回收及再生利用

周天宇(), 李玖重, 张婧帆   

  1. 中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南 洛阳 471003
  • 收稿日期:2024-03-27 出版日期:2025-01-26 发布日期:2025-02-14
  • 作者简介:周天宇(1991—),男,高级工程师,主要从事节能与传热技术研发工作, zhoutianyu.segr@sinopec.com
  • 基金资助:
    中国石化科技开发项目,废弃保冷材料PIR的循环再生及资源化利用技术开发(CHG22149)

Degradation and recycling of waste polyisocyanurate foams

ZHOU Tianyu(), LI Jiuchong, ZHANG Jingfan   

  1. SINOPEC Engineering (Group) Co,Ltd,Luoyang R&D Center of Technology,Luoyang 471003,China
  • Received:2024-03-27 Online:2025-01-26 Published:2025-02-14

摘要:

采用双组份醇解剂乙二醇(EG)和二乙二醇(DEG)对废弃聚异氰脲酸酯泡沫塑料(PIR)进行降解,得到降解产物多元醇,利用降解产物发泡得到再生PIR泡沫塑料。对降解产物进行红外光谱和黏度测试分析,对再生PIR泡沫进行表观密度、压缩强度、导热系数及热稳定性分析表征。结果表明,当双组份醇解剂质量配比为mEGmDEG=1∶2;NaOH催化剂加入量为1.0 g;降解反应条件为“180 ℃下1 h+190 ℃下1 h”时,降解废弃PIR和再生发泡PIR效果最佳。此时,降解产物黏度为2 246 mPa·s;再生PIR泡沫表观密度为0.044 8 g/cm³、压缩强度为0.398 MPa、导热系数为0.025 W/m•K,均能达到国家标准要求。

关键词: 聚异氰脲酸酯泡沫, 降解, 回收, 再利用, 醇解剂

Abstract:

Two component alcoholysis agents, ethylene glycol (EG) and diethylene glycol (DEG), were used to degrade the waste polyisocyanurate foams (PIR) to obtain polyol as the degradation product. The regenerated PIR foams were obtained through foaming the degradation product. The infrared spectrum and viscosity of the degradation product were and analyzed. The apparent density, compression strength, thermal conductivity and thermal stability of the regenerated PIR were investigated. The results indicated that the degradation of waste PIR and regeneration of PIR obtained an optimal effect at a mass ratio of mEG to mDEG of 1/2 and a NaOH catalyst amount of 1.0 g under the degradation reaction condition at 180 ºC for 1 h and then at 190 ºC for 1 h. In this case, the viscosity of the degradation product was 2 246 mPa∙s. The apparent density of regenerated PIR was 0.044 8 g/cm³, its compressive strength was 0.398 MPa, and its thermal conductivity was 0.025 W/m∙K. All performance parameters can meet a requirement of national standards.

Key words: polyisocyanurate foam, degradation, recovery, reuse, alcoholysis agent

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