Kaur Anureet, Gautrot Julien E, Akutagawa Keizo, Watson Douglas, Bickley Alan, Busfield James J C
Queen Mary University of London London UK
Weir Advanced Research Centre Glasgow UK
RSC Adv. 2023 Aug 10;13(34):23967-23975. doi: 10.1039/d3ra04157c. eCollection 2023 Aug 4.
This report presents an evaluation of thiyl radical-induced / isomerism in double bond-containing elastomers, such as natural, polychloroprene, and polybutadiene rubbers. The study aims to extensively investigate structural changes in polymers after functionalisation using thiol-ene chemistry, a useful click reaction for modifying polymers and developing materials with new functionalities. The paper reports on the use of different thiols, and / isomerism was detected through H NMR analysis, even at very low alkene/thiol mole ratios. The study finds that the configurational arrangements between non-functionalised elastomer units and thiolated units followed a -functionalised- units arrangement up to an alkene/thiol mole feed ratio of 0.3, while from 0.4 onward, a combination of -functionalised- and -functionalised- configurations are found. Additionally, it is observed that by increasing the level of functionalisation, the glass transition temperature of the resulting modified elastomer also increases. Overall, this study provides valuable insights into the effects of thiol-ene chemistry on the structure and properties of elastomers and could have important implications for the development of new materials with enhanced functionality.
本报告介绍了对含双键弹性体（如天然橡胶、氯丁橡胶和聚丁二烯橡胶）中硫自由基引发的异构化的评估。该研究旨在广泛研究使用硫醇-烯化学对聚合物进行功能化后聚合物的结构变化，硫醇-烯化学是一种用于修饰聚合物和开发具有新功能材料的有用点击反应。本文报道了使用不同硫醇的情况，并且通过核磁共振氢谱（¹H NMR）分析检测到了异构化，即使在非常低的烯烃/硫醇摩尔比下也是如此。研究发现，在烯烃/硫醇摩尔进料比达到0.3之前，未功能化弹性体单元和硫醇化单元之间的构型排列遵循一种功能化单元排列，而从0.4开始，则发现了功能化和功能化构型的组合。此外，观察到通过提高功能化水平，所得改性弹性体的玻璃化转变温度也会升高。总体而言，本研究为硫醇-烯化学对弹性体结构和性能的影响提供了有价值的见解，并且可能对开发具有增强功能的新材料具有重要意义。
