中文摘要：

研究了由原位聚合法制备的聚甲基丙烯酸丁酯／炭黑（PBMA／CB）复合材料在有机溶剂蒸气中的电阻响应。结果表明，复合材料在有机溶剂蒸气中的电阻响应显著依赖于聚合物基体与有机溶剂的相容性，而且其电阻响应程度大小可以由聚合物摹体和有机溶剂之间的三维溶度参数差之和（△δ^2）来衡量；温度会显著影响复合材料在有机溶剂蒸气中的电阻响应时间，对电阻响应程度也有一定程度的影响，这一结果与聚合物基体的玻璃化转变温度有关；复合材料对有机蒸气的最大电阻响应程度随有机蒸气分压呈现指数级增长；自然老化会导致复合材料电阻响应程度的下降，但恢复性能显著提高，负蒸气系数效应（NVC）强度减弱。PBMA／CB复合材料可以作为气敏材料用于检测有机溶剂蒸气。

英文摘要：

Electrical responses of poly（buthyl methacrylate）/carbon black （PBMA/CB） composites prepared via in situ polymerization in organic solvent vapors are investigated. The solubility of polymer matrix in organic solvent has a great influence on the responsivity and can be measured in terms of the sum （△δ^2） of the differences between the polymer and the solvent in three dimensional solubility parameters. Temperature also affects the response time and responsivity of the composites in organic vapors, and it is related to Tg of polymer matrix. The maximum electrical responsivity, （Rmax- Ro）/Ro, increased exponentially with increasing partial pressure（ P /P^0） of the organic vapor. In addition, natural aging improves the recoverability and decreases the NVC effect of the composites. Such PBMA/CB composites can be used as potential gas sensing materials in detecting organic solvent vapors.