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生物来源的4-烯-1,2-二甲基为可回收的高性能聚硫化物

Tianyu Zhu¹, Ruishi Lei¹, Bowen Wang¹

¹Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, and College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.

Angewandte Chemie (International ed. in English)

|April 15, 2025

概括

研究人员从生物来源的材料中开发了新的可回收的基替代聚二硫化物. 这些聚合物提供了更好的热和机械性能,使可持续的材料应用具有高可回收性.

科学领域:

聚合物化学聚合物化学
材料科学材料科学材料科学
可持续化学可持续化学

背景情况:

对循环塑料经济的日益增长的需求需要开发可回收的聚合物.
聚二硫化物通过动态共价S−S键提供了内在的可降解性.
目前,从脂酸中衍生出的多硫化物往往缺乏足够的热和机械性能,无法广泛应用.

研究的目的:

为了合成一种新型类型的基替代1,2-二甲基乙醇单体.
为了研究这些单体的环开聚合,使其变成以基替代的聚二硫化物.
评估由此产生的聚合物的可回收性,热,光学和机械性能,以实现可持续的材料应用.

主要方法:

从生物来源的乙烯中可扩展合成以基替代的1,2-二甲基乙醇单体.
合成的单体的环开聚合,以产生以基替代的多化物.
聚合物属性的表征,包括可回收性,热稳定性,光学性能和交联网络的机械强度.

主要成果:

成功的可扩展合成了新型的1,2-二甲基乙醇单体,以基替代.
亚рил替代的多二硫化物具有很高的可回收性,但不影响稳定性.
随着阿里尔侧链的引入,观察到热性质的系统性改善.
在交联网络中实现了具有竞争力的光学性能和强大的机械性能.

结论:

开发的基替代聚化物在可回收聚合物技术方面是一个有前途的进步.
这些聚合物表现出可回收性,稳定性和增强物理性质的良好平衡.
这些发现突出了这些新材料在可持续材料领域的各种应用中的潜力.

关键词:

1,2-阿里尔的迁移情况动态共价聚合物动态共价聚合物聚二硫化物 (PDD) 是一种可回收的聚合物可以回收利用.环开放聚合的聚合方式

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相关概念视频

Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

Preparation and Reactions of Thiols

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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.

Structure and Nomenclature of Thiols and Sulfides

Structure and Nomenclature of Thiols and Sulfides

Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...