From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating

IF 4.6 2区化学 Q2 POLYMER SCIENCE

Chinese Journal of Polymer Science Pub Date : 2026-07-01 DOI:10.1007/s10118-026-3720-8

Devesh Sane, Neel Godbole, Debarati Maity, Anagha Sabnis

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引用次数: 0

Abstract

This study explored the chemical recycling of polyurethane (PU) elastomers via acidolysis using itaconic acid and dimethylformamide (DMF) as the solvent without the use of glycol. The depolymerization process was optimized by varying the reaction parameters, and the resulting oligomers were analyzed using end-group analysis. PU coatings were formulated using recovered oligomers and isocyanates derived from isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), and toluene diisocyanate (TDI). Analytical techniques including differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS), and gel permeation chromatography (GPC) were used for characterization. TDI based coatings exhibited superior optical, mechanical, chemical, thermal, and anticorrosive performance over the HDI and IPDIbased coatings. This study successfully showcased a facile method for recycling of PU waste along with PU coating formulations from 100% recycled oligomers, showcasing the use of recycled polyols in high performance applications.

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从废料到涂料：衣康酸酸解聚氨酯弹性体用于聚氨酯涂料

研究了在不使用乙二醇的情况下，以衣康酸和二甲基甲酰胺（DMF）为溶剂，通过酸解法回收聚氨酯（PU）弹性体。通过改变反应参数对解聚工艺进行了优化，并利用端基分析对解聚产物进行了分析。用回收的低聚物和异氰酸酯（IPDI）、六亚甲基二异氰酸酯（HDI）和甲苯二异氰酸酯（TDI）衍生的异氰酸酯配制PU涂料。采用差示扫描量热法（DSC）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）、电化学阻抗谱（EIS）和凝胶渗透色谱（GPC）等分析技术进行表征。TDI基涂料在光学、机械、化学、热学和防腐性能上都优于HDI和ipdi基涂料。这项研究成功地展示了一种简单的回收PU废料的方法，以及100%回收低聚物的PU涂层配方，展示了回收多元醇在高性能应用中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chinese Journal of Polymer Science 化学-高分子科学

CiteScore

7.10

自引率

11.60%

发文量

218

审稿时长

6.0 months

期刊介绍： Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.