在橡胶加工设备中制备溴化丁基橡胶

Preparation of BIIR in Rubber Processing Equipment

选用无溶剂的本体法,以N-溴代琥珀酰亚胺与少量丁基橡胶（IIR）和稳定剂的预混物为溴化剂,在橡胶加工设备中对IIR进行化学改性,制备溴化丁基橡胶（BIIR）。通过红外光谱、核磁共振氢谱对产物BIIR的结构进行分析,并考察反应时间、温度和溴化剂用量等对BIIR硫化特性和物理性能的影响。结果表明：采用该方法可以制得BIIR,没有观察到腐蚀设备的情况,产物BIIR的硫化速率相比原料IIR有明显提高,硫化特性和物理性能达到了商品BIIR的水平;溴化反应温度应在60~100℃范围内,在所考察的范围内,溴化剂用量和反应时间对BIIR的硫化特性和物理性能影响不大。

In this work, the brominated isobutylene isoprene rubber（BIIR） was prepared through solvent free bromination process using regular rubber processing equipment in which IIR was modified using predispersed compound containing N-bromosuccinimide, small amount of IIR and stabilizer. The structure of product was characterized by FTIR and 1H-NMR spectra,and the effect of reaction conditions（time,temperature and bromination agent level）on the curing characteristics and mechanical properties of BIIR was investigated. It was found that there was no equipment corrosion using this process. Compared with IIR,the curing rate of prepared BIIR increased significantly,and the curing characteristics and mechanical properties of the product reached the level of the commercial BIIR. The brominating reaction temperature should be at 60~100 ℃,and the addition level of brominating agent and the brominating time had little effect on the curing characteristics and mechanical properties of BIIR.