Reduction Performance and Mechanism of Liquid Terminated-Carboxyl Fluoroelastomers Using Unitary or Binary Metal Hydride Reduction Systems

IF 1 4区化学 Q4 POLYMER SCIENCE

Polymer Science, Series B Pub Date : 2023-09-20 DOI:10.1134/S1560090423701142

Yunfei Chang, Mingyi Liao, Jiaming Wen, Ziwen Gan, Gaofei Yuan

{"title":"Reduction Performance and Mechanism of Liquid Terminated-Carboxyl Fluoroelastomers Using Unitary or Binary Metal Hydride Reduction Systems","authors":"Yunfei Chang, Mingyi Liao, Jiaming Wen, Ziwen Gan, Gaofei Yuan","doi":"10.1134/S1560090423701142","DOIUrl":null,"url":null,"abstract":"Unitary metal hydride reduction systems (diisobutyl aluminum hydride and lithium aluminum hydride) and binary metal hydride reduction systems (sodium borohydride/diisobutyl aluminum hydride and lithium aluminum hydride/diisobutyl aluminum hydride) were used to reduce liquid terminated-carboxyl fluoroelastomers (LTCFs). LTCFs were efficiently converted to the corresponding liquid terminated-hydroxyl fluoroelastomers (LTHFs) via a simple one-pot method. The reductive rate of LTHFs was analyzed by chemical titration. The structure of LTCFs and LTHFs was analyzed by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H NMR) spectroscopy and 19F nuclear magnetic resonance (19F NMR) spectrocopy. The results show that –C=C– and carboxyl groups of LTCFs are reduced efficiently. The effect of unitary metal hydride reduction systems and binary metal hydride reduction systems on the performances of the LTCFs reduction was compared. The results show binary metal hydride reduction systems are more efficient for reduction of LTCFs at ambient temperature. In addition, sodium borohydride/diisobutyl aluminum hydride binary metal hydride reduction system achieves the highest reductive rate (93%) and its reductive mechanism was investigated.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"475 - 486"},"PeriodicalIF":1.0000,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Science, Series B","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.1134/S1560090423701142","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

Unitary metal hydride reduction systems (diisobutyl aluminum hydride and lithium aluminum hydride) and binary metal hydride reduction systems (sodium borohydride/diisobutyl aluminum hydride and lithium aluminum hydride/diisobutyl aluminum hydride) were used to reduce liquid terminated-carboxyl fluoroelastomers (LTCFs). LTCFs were efficiently converted to the corresponding liquid terminated-hydroxyl fluoroelastomers (LTHFs) via a simple one-pot method. The reductive rate of LTHFs was analyzed by chemical titration. The structure of LTCFs and LTHFs was analyzed by Fourier transform infrared spectroscopy (FTIR), ¹H nuclear magnetic resonance (¹H NMR) spectroscopy and ¹⁹F nuclear magnetic resonance (¹⁹F NMR) spectrocopy. The results show that –C=C– and carboxyl groups of LTCFs are reduced efficiently. The effect of unitary metal hydride reduction systems and binary metal hydride reduction systems on the performances of the LTCFs reduction was compared. The results show binary metal hydride reduction systems are more efficient for reduction of LTCFs at ambient temperature. In addition, sodium borohydride/diisobutyl aluminum hydride binary metal hydride reduction system achieves the highest reductive rate (93%) and its reductive mechanism was investigated.

Abstract Image

查看原文本刊更多论文

使用单一或二元金属氢化物还原体系还原液态端基羧基氟橡胶的性能和机理

使用单元金属氢化物还原体系（二异丁基氢化铝和氢化铝锂）和二元金属氢化物还原体系（硼氢化钠/二异丁基氢化铝和氢化铝锂/二异丁基氢化铝）还原液态端基羧基氟橡胶（LTCFs）。通过简单的一锅法，LTCFs 被高效地转化为相应的液态端羟基氟橡胶（LTHFs）。通过化学滴定法分析了 LTHFs 的还原率。傅立叶变换红外光谱（FTIR）、1H 核磁共振（1H NMR）光谱和 19F 核磁共振（19F NMR）光谱分析了 LTCFs 和 LTHFs 的结构。结果表明，LTCF 的 -C=C- 和羧基被有效还原。比较了单元金属氢化物还原体系和二元金属氢化物还原体系对 LTCFs 还原性能的影响。结果表明，二元金属氢化物还原体系在常温下还原 LTCFs 的效率更高。此外，硼氢化钠/二异丁基铝氢化物二元金属氢化物还原体系的还原率最高（93%），并对其还原机理进行了研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Polymer Science, Series B 化学-高分子科学

CiteScore

1.80

自引率

8.30%

发文量

审稿时长

>0 weeks

期刊介绍： Polymer Science, Series B is a journal published in collaboration with the Russian Academy of Sciences. Series B experimental and theoretical papers and reviews dealing with the synthesis, kinetics, catalysis, and chemical transformations of macromolecules, supramolecular structures, and polymer matrix-based composites (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed