作者：Zhengxiang Zhou, Qiangqiang Yan, Yinzhong Guo, Tom Kalanta, Yingfeng Yu*
关键字：Polyurethane, Degradation, Bis(Cyclohexanone) Oxalyldihydrazone
论文来源：期刊
具体来源：ACS APPLIED POLYMER MATERIALS
发表时间：2024年
Detachable and degradable polymeric adhesives have demonstrated considerable value and significance, accompanying the increasing demands for waste recycling and the ongoing concern for green and sustainable development. Herein, a chain extender containing the bis(cyclohexanone) oxalyldihydrazone structure was introduced into polyurethanes, which achieved efficient degradation in an alkaline environment with the ??w decreasing from 41.9 to 4.9 kDa. The shear strength of the linear polyurethane between polycarbonate specimens reduced by 98.5%, and on a wide range of substrates, the shear strength of both linear and cross-linked polyurethanes reduced by more than 65.0% as a joint result of the base and cosolvent. These degradable polyurethanes with adhesion properties have exhibited great potential to be used in the separation of multilayer flexible packaging, electronics assembly, and battery pack recycling.