2022年1月1日
BROMINATION OF NATURAL RUBBER WITH N-BROMOSUCCINIMIDE
Rubber Chemistry and Technology
- ,
- 巻
- 95
- 号
- 1
- 開始ページ
- 37
- 終了ページ
- 45
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.5254/rct.21.78980
- 出版者・発行元
- Rubber Division, ACS
ABSTRACT
The mechanism of bromination of natural rubber (NR) was studied by solution-state 1H-NMR spectroscopy. The bromination of NR was carried out at 20–50 °C with N-bromosuccinimide as the brominating agent, and the kinetic study of bromination was conducted under nitrogen atmosphere at 30–50 °C for various reaction times. The influence of bromine atom substituent on the bromination rate constant (k) also was investigated. Bromine atom content was found to be dependent upon the reaction time, indicating first-order kinetics. The activation energy of bromination of NR, calculated from the reaction rate constants, was 19.3, 5.5, and 5.8 kJ mol−1 for bromine atom linked to carbon atom with methylene proton and methylene protons, respectively.
The mechanism of bromination of natural rubber (NR) was studied by solution-state 1H-NMR spectroscopy. The bromination of NR was carried out at 20–50 °C with N-bromosuccinimide as the brominating agent, and the kinetic study of bromination was conducted under nitrogen atmosphere at 30–50 °C for various reaction times. The influence of bromine atom substituent on the bromination rate constant (k) also was investigated. Bromine atom content was found to be dependent upon the reaction time, indicating first-order kinetics. The activation energy of bromination of NR, calculated from the reaction rate constants, was 19.3, 5.5, and 5.8 kJ mol−1 for bromine atom linked to carbon atom with methylene proton and methylene protons, respectively.
- リンク情報
- ID情報
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- DOI : 10.5254/rct.21.78980
- ISSN : 0035-9475
- eISSN : 1943-4804