Modification of graphite to increase reaction rate in styrene/graphite in situ polymerization system

IF 2.6 4区化学 Q3 POLYMER SCIENCE

Journal of Polymer Research Pub Date : 2024-09-09 DOI:10.1007/s10965-024-04135-9

Hossein Abedini, Seyed Saeid Tayebi, Mohammad Daneshgar

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Abstract

In this work, with the aim of increasing the monomer conversion rate in the styrene-graphite in situ polymerization system, graphite modification methods have been investigated. Modification of the graphite in the presence of nitric acid, sodium hydroxide or sodium dodecyl benzene sulfate (SDBS) was investigated with five different methods in order to reduce its adverse effects on the polymerization rate of styrene. The most effective modification approach was determined using quantitative data such as polymerization conversion and graphite dispersion in organic phase. Compared to other modified samples and unmodified graphite, graphite modified in sodium hydroxide solution with SDBS showed the most compatibility with the polymerization system and caused a significant increase in the monomer conversion rate. Monomer conversion increases by 22% and 29% respectively in the presence of 0.5% and 2% of the best modified graphite compared to non-modified graphite. Also, the results showed that this modification method stabilizes the suspension of graphite particles in styrene for a longer period of time than other methods.

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改性石墨以提高苯乙烯/石墨原位聚合体系的反应速率

在这项研究中，为了提高苯乙烯-石墨原位聚合体系中的单体转化率，对石墨改性方法进行了研究。研究了在硝酸、氢氧化钠或十二烷基苯硫酸钠（SDBS）存在下对石墨进行改性的五种不同方法，以减少其对苯乙烯聚合速率的不利影响。通过聚合转化率和石墨在有机相中的分散度等定量数据，确定了最有效的改性方法。与其他改性样品和未改性石墨相比，在氢氧化钠溶液中用 SDBS 进行改性的石墨与聚合体系的兼容性最好，可显著提高单体转化率。与未改性石墨相比，在含有 0.5% 和 2% 的最佳改性石墨时，单体转化率分别提高了 22% 和 29%。此外，研究结果表明，与其他方法相比，这种改性方法能在更长的时间内稳定石墨颗粒在苯乙烯中的悬浮状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.

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