Polyurethane Detachable Lamination Adhesives Containing Alkaline Degradable Aromatic Chain Extender
作者：Juanjuan Wang, Qiangqiang Yan, Yinzhong Guo, Yingfeng Yu*, et al.
关键字：polyurethane, degradation, adhesive
论文来源：期刊
具体来源：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
发表时间：2024年
With increasingly strict requirements for environmental protection, degradable adhesives are urgently required to enable recycling challenge. In this paper, an aromatic chain extender, Fmoc-BHA, which can undergo 1,4-elimination under alkaline conditions, and polyurethane adhesives, which readily decompose after deprotection, are synthesized. The molecular weight of the degradable polyurethane decreased from 6.5 × 104 to 1.1 × 104 g/mol after alkaline treatment. The process and mechanism of degradation was studied by nuclear magnetic resonance, Fourier transform infrared, and gel permeation chromatography. The evolution of bond shear strength under different alkaline conditions was tested; the results showed the practicality of using a degradable polyurethane laminating adhesive to enable film detachment.