高级检索

    袁荞龙, 漆刚, 刘峰, 刘青. 溴氯化丁基橡胶的制备与性能[J]. 华东理工大学学报（自然科学版）, 2014, (2): 153-160.
    引用本文: 袁荞龙, 漆刚, 刘峰, 刘青. 溴氯化丁基橡胶的制备与性能[J]. 华东理工大学学报（自然科学版）, 2014, (2): 153-160.
    shu
    YUAN Qiao-long, QI Gang, LIU Feng, LIU Qing. Preparation and Properties of Bromochlorinated Butyl Rubber[J]. Journal of East China University of Science and Technology, 2014, (2): 153-160.
    Citation: YUAN Qiao-long, QI Gang, LIU Feng, LIU Qing. Preparation and Properties of Bromochlorinated Butyl Rubber[J]. Journal of East China University of Science and Technology, 2014, (2): 153-160.
    shu

    溴氯化丁基橡胶的制备与性能

    Preparation and Properties of Bromochlorinated Butyl Rubber

      摘要
    • 摘要: 以丁基橡胶（IIR）为原料，在非啮合反向双螺杆挤出机中制备了氯化丁基橡胶(CIIR)，在80 ℃下用液溴溴化CIIR正己烷溶液获得溴氯化丁基橡胶(BCIIR)。用1H NMR、热重分析仪和无转子硫化仪对卤化丁基橡胶的结构、热稳定性和硫化性能进行了研究。结果表明，氯化挤出制备了w(Cl)=1.1%的CIIR，当氯化挤出温度为100～110 ℃时，有利于生成仲位氯代烯丙基结构，CIIR中尚余少量异戊二烯结构。BCIIR中w(Br)为0.2%~0.8%，并随液溴加入量的增加而提高。CIIR的溴化会导致橡胶的重均分子量和不饱和度下降，但不饱和度仍可保持在1.2%左右。CIIR溴化后热稳定性提高，BCIIR的热分解温度高于CIIR，并随溴质量分数的增加而进一步升高；BCIIR的硫化速度明显加快，比CIIR提高了5％，比IIR提高了14%。

       

      Abstract: Butyl rubber was chlorinated to form chlorinated butyl rubber(CIIR) in non intermeshing counter rotating twin screw extruder, and further brominated in hexane solution by liquid bromine at 80 ℃. Bromochlorinated butyl rubber(BCIIR) was obtained and characterized by proton nuclear magnetic resonance, thermal gravimetry and rotorless curemeter. Results show that CIIR with the mass fraction of chlorine 1.1% is prepared by chlorination extrusion process. Secondary chloro allylic structure in CIIR is facile to achieve when the temperature of chlorination extrusion is in the range of 100—110 ℃. Furthermore, a small amount of isoprene structure is still in CIIR. The mass fraction of bromine in BCIIR is in the range of 0.2%—0.8%, and increases upon the increasing of the amount of liquid bromine. The bromination of CIIR results in decrease of weight average molecular weight and unsaturation degree of the rubber. However, the unsaturation degree of CIIR retains about 1.2%. The thermal stability of CIIR is improved with bromination. The thermal decomposition temperature of BCIIR is higher than that of CIIR, and enhances with the increase of mass fraction of bromine. The rate of vulcanization of BCIIR expedites markedly, which is 5% higher than that of CIIR, and 14% higher than that of butyl rubber.

       

      • HTML全文
      • 参考文献(0)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回