反硫化聚合物的拉曼分析,Polymer Chemistry

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反硫化聚合物的拉曼分析
Polymer Chemistry ( IF 4.1 ) Pub Date : 2023-02-24 , DOI: 10.1039/d2py01408d
Liam J. Dodd ₁ , Cássio Lima ₂ , David Costa-Milan ₃ , Alex R. Neale ₃ , Benedict Saunders ₄ , Bowen Zhang ₁ , Andrei Sarua ₅ , Royston Goodacre ₂ , Laurence J. Hardwick ₃ , Martin Kuball ₅ , Tom Hasell ₁

Affiliation

反硫化聚合物因其简单、可修改和低成本的合成而受到广泛的研究关注。这些聚合物由工业副产品元素硫合成，导致硫含量高，这对聚合物的行为有很多影响，并赋予它们各种有价值的特性。正因为如此，反硫化聚合物在工业上有许多有吸引力的应用，但直接导致这种情况的高硫含量也使聚合物难以分析。因此，人们对反硫化聚合物的结构知之甚少，尽管存在合理的理论，但缺乏从对聚合物键合水平结构的完整理解中得出的直接证据。这里介绍的是使用拉曼光谱更好地检查反硫化聚合物的性质。对几种拉曼光谱技术进行了比较和对比，揭示了可以从拉曼光谱中获得与这些否则难以分析的聚合物有关的信息。方法优化与计算研究和模型化合物一起提出，所有这些都有助于理解从拉曼光谱获得的光谱信息。结果发现，拉曼光谱能够以快速且无损的方式提供有关反硫化聚合物的几个关键信息。其中包括计算无定形元素硫含量、评估均匀性、跟踪正在进行的反应，最重要的是，

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Raman analysis of inverse vulcanised polymers

Inverse vulcanised polymers have received significant research attention on account of their easy, modifiable, and low-cost synthesis. These polymers are synthesized from the industrial by-product, elemental sulfur, resulting in a high sulfur content, which has many influences on the polymers’ behavior, and gives them their wide variety of valuable properties. Because of this, inverse vulcanised polymers have many industrially attractive applications, however the high sulfur content that is directly responsible for this, also makes the polymers challenging to analyse. As such, the structure of inverse vulcanised polymers is poorly understood, and although sensible theories exist, there is a lack of direct evidence derived from a complete understanding of the polymers’ bonding level structure. Presented here is the use of Raman spectroscopy to scrutinise better the nature of inverse vulcanised polymers. Several Raman spectroscopic techniques have been compared and contrasted, revealing what information can be obtained from Raman spectroscopy in regard to these otherwise difficult to analyse polymers. Method optimisations are presented alongside computational studies and model compounds, all of which benefit the understanding of spectral information obtained from Raman spectroscopy. It was found that Raman spectroscopy is capable of providing several key pieces of information about inverse vulcanised polymers in a rapid and non-destructive way. These include, calculating the amorphous elemental sulfur content, assessing the homogeneity, tracking reactions in progress, and most crucially, identifying the proportions of different sulfur ranks of the polymer, which has thus far eluded all other analytical techniques.

更新日期：2023-03-01

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