Regulating the Thermodynamics and Thermal Properties of Depolymerizable Polycyclooctenes through Substituent Effects
Regulating the Thermodynamics and Thermal Properties of Depolymerizable Polycyclooctenes through Substituent Effects
复制标题
DOI：
10.1002/marc.202200304
复制
发表时间：
2022-06-21
影响因子：
4.6
通讯作者：
Wang, Junpeng
中科院分区：
文献类型：
--
作者：
Sathe, Devavrat;Chen, Hanlin;Wang, Junpeng
化学回收单体（CRM）是向循环聚合物经济转型的一条有前途的途径。为了开发具有有用特性的新型 CRM 系统，了解单体结构对聚合/解聚行为的影响非常重要。在早期的工作中，该小组展示了通过反式环丁烷稠合环辛烯（tCBCO）的开环复分解聚合制备的化学可回收聚合物。在此，研究了环丁烷上的不同取代基如何影响 tCBCO 聚合物的热力学和热性能。研究发现，在顺式二酯官能化的 tCBCO 中引入额外的取代基有利于聚合反应的转化；当顺式二酯异构化为其反式对应物时，还观察到聚合转化率增加。还研究了这些结构特征对热性能的影响。这些发现可以为设计下一代 CRM 聚合物提供重要见解。
Chemical recycling to monomer (CRM) is a promising route for transitioning to a circular polymer economy. To develop new CRM systems with useful properties, it is important to understand the effects of monomer structure on polymerization/depolymerization behavior. In earlier work, this group demonstrated chemically recyclable polymers prepared by ring-opening metathesis polymerization of trans-cyclobutane fused cyclooctenes (tCBCO). Here, it is investigated how different substituents on cyclobutane impact the thermodynamics and thermal properties of tCBCO polymers. Introducing additional substituents to a cis-diester functionalized tCBCO is found to favor the conversion of polymerization; increased polymerization conversion is also observed when the cis-diester is isomerized into its trans counterpart. The effects of these structural features on the thermal properties are also studied. These findings can provide important insights into designing next-generation CRM polymers.