Polybutadiene, a widely used synthetic rubber containing unsaturated bonds, has traditionally undergone functionalization processes such as thiol–ene radical addition, hydrogenation, and epoxidation. In this study, we present a new approach for multi-functionalizing polybutadiene through the reversible addition–fragmentation chain transfer polymerization/macromolecular design by interchange of xanthates (RAFT/MADIX) technology. The addition of xanthates onto polybutadiene was accomplished by thermal initiation, photoinitiation, or oxygen-mediated processes. Leveraging the sustained reactivity of dithiocarbonate on functionalized polymer, we further realized dexanthylation and transformation of dithiocarbonate. Finally, xanthate crosslinkers were synthesized for the simultaneous functionalization and cross-linking of polybutadiene.

中文翻译：

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通过 RAFT/MADIX 技术实现聚丁二烯的多功能化


聚丁二烯是一种广泛使用的含有不饱和键的合成橡胶，传统上经历了巯基-烯自由基加成、加氢和环氧化等官能化过程。在这项研究中，我们提出了一种通过黄原酸酯互换 （RAFT/MADIX） 技术通过可逆加成-碎裂链转移聚合/大分子设计实现多功能化聚丁二烯的新方法。将黄药添加到聚丁二烯上是通过热引发、光引发或氧介导的过程完成的。利用二硫代碳酸酯在功能化聚合物上的持续反应性，我们进一步实现了二硫代碳酸酯的右旋杂酰化和转化。最后，合成了黄原酸酯交联剂，用于聚丁二烯的同时官能化和交联。