原位乳液聚合制备导电性聚苯胺/氯磺化聚乙烯复合材料及其性能

以十二烷基苯磺酸为乳化剂及掺杂剂，由二甲苯及水组成乳液，在氯磺化聚乙烯存在下，采用一步原位乳液聚合法制备了聚苯胺／氯磺化聚乙烯(PAn／CSPE)导电复合材料。研究了用熔融法(MP)或溶液法(SP)加工复合物材料的导电性及力学性能，并进行了表征。结果表明，MP法制得的复合材料在导电性及力学性能方面优于SP法制得的复合材料；当PAn质量分数为12％～18％时，MP法复合材料呈现热塑性弹性体行为，拉伸强度为6～8MPa，扯断伸长率大于400％，永久变形小于30％。当PAn质量分数小于18％时，SP法复合材料用闻甲酚二次渗杂后的导电率比原复合材料高出6个数量级，且其导电渗滤阈值由PAn质量分数22％降至3％。

Conductive polyaniline/chlorosulfonated polyethylene composites prepared by in situ emulsion polymerization and their properties

The conductive composites of polyaniline/chlorosulfonated polyethylene (PAn/CSPE) were prepared by a direct,one-step in situ emulsion polymerization method. The polymerization of aniline was performed in an emulsion comprising water and xylene containing CSPE in the presence of dodecylbenzene sulfonic acid which acted both as a surfactant and a dopant for PAn. The conductivity and mechanical properties of the composites processed by melt method(MP) or solution method(SP) were studied. At the same mass fraction of PAn,the conductivity and tensile strength of MP composites was higher than that of SP composites. When mass fraction of the PAn of MP sample was 12%~18%, the composites behavior was same as a thermoplastic elastomer that tensile strength was 6~8 MPa,elongation at break was more than 400% and permanent set was less than 30%.The conductivity of composites obtained by SP method after secondary doping with m-cresol was about 6 order of magnitude higher than the original at about 18% mass fraction of PAn.The percolation threshold for conductivity of the composite was lowered to 3% mass fraction of PAn.