文章摘要
溴化工艺对溴化丁基橡胶溴含量及凝胶含量的影响
Effects of Bromination Technology on Bromine Content and Gel Content of Brominated Butyl Rubber
  
DOI:10.16865/j.cnki.1000-7555.2018.07.006
中文关键词: 胶乳法  溴化丁基橡胶  溴含量  凝胶含量  溶解性能
英文关键词: latex method  brominated butyl rubber  bromine content  gel content  solubility
基金项目:国家自然科学基金资助项目(21264006)
作者单位
陈 奕,薛行华,朱文靖,李 光 海南大学 材料与化工学院,海南 海口 570228 
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中文摘要:
      以胶乳法制备溴化丁基橡胶(BIIR),研究了溴化工艺(溴化剂用量、溴化温度和体系pH 值)对BIIR产物溴含量及凝胶含量的影响,并考察了产物的溶解性能。结果表明,丁基胶乳中丁基橡胶(IIR)分子链在少量溴化剂存在时就可以发生交联,溴化产物溴含量均在3%以下。溴化剂用量2.5mL、溴化温度50℃、pH 值为7时BIIR溴含量和凝胶含量分别为2.66%和54.6%。BIIR在有机溶剂中的溶解能力从大到小为:氯仿>环己酮>四氢呋喃>苯酚>丙酮>甲苯;在同一溶剂中BIIR溶解性能则随着溴含量的增加而增大。
英文摘要:
      The brominated butyl rubbers (BIIR) were prepared from latex. The effects of bromination technology such as amount of brominating agent, bromination temperature and pH value on bromine content and gel content of BIIR products, as well as the solubilities of BIIRs were investigated. The results show that the crosslinking among the molecular chains of butyl rubber (IIR) in butyl rubber latex can take place in the presence of small amount of brominating agent, and the bromine content of brominated products is below 3%. The bromine content and the gel content of BIIR are 2.66% and 54.6%, respectively, when the amount of brominating agent is 2.5 mL, bromination temperature 50 ℃ and pH value 7. The solubility sequence of BIIR products in different organic solvents is as follows: chloroform>cyclohexanone>tetrahydrofuran>phenol>acetone>toluene, and the solubility of BIIR in the same solvent increases with the increment of bromine content.
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