聚合物/磺酸掺杂煤基聚苯胺复合物的制备研究

Study on Preparation of Polymer/Sulfonic Acid Doping Coal-based Polyaniline Composite

选择十二烷基苯磺酸(DBSA)原位掺杂煤基聚苯胺(CBP-DBSA)为导电填料,采用熔融共混技术成功制备了乙烯-醋酸乙烯酯共聚物/CBP-DBSA(EVA/CBP-DBSA)复合物及低密度聚乙烯/CBP-DBSA(LDPE/CBP-DB-SA)复合物。探讨了CBP-DBSA含量、聚合物化学结构对电导率、力学性能的影响,并借助SEM、FTIR、TG测试手段,研究了复合物的结构与性能。结果表明:随着CBP-DBSA含量增加,复合物电导率呈上升趋势,并渐趋平缓;而其力学性能逐渐下降。与LDPE/CBP-DBSA相比而言,EVA/CBP-DBSA的导电逾渗阈值较低,为7%,且电导率较高、力学性能受损较小。CBP-DBSA质量分数为15%时,EVA/CBP-DBSA复合物的拉伸强度为21.08MPa,断裂伸长率为278.38%,电导率达到7.56×10-9S/cm。EVA与CBP-DBSA的氢键作用可改善两相的界面亲和力,EVA是与CBP-DBSA共混制备抗静电材料较好的匹配基体。

Selecting coal-based polyaniline in-situ doped with dodecylbenzene sulfonic acid（DBSA）as conductive filler,EVA/CBP-DBSA and LDPE/CBP-DBSA composite were prepared successfully by melt blending.The effect of CBP-DBSA content and polymer configuration on conductivity and mechanical performance was discussed,and by means of SEM,FTIR,TG,configuration and performance of composite were researched.The results showed that with the increase of CBP-DBSA content,conductivity of composite present rose and gradually kept stable,but mechanical property gradually declined.Be compared to LDPE/CBP-DBSA,EVA/CBP-DBSA had lower conductive threshold which was 7% and the higher conductivity and mechanical performance decreased less.When the mass fraction of CBP-DBSA was 15 wt%,the tensile strength of EVA/CBP-DBSA was 21.08 MPa,the elongation at break was 278.38%,the conductivity was 7.56×10-9 S/cm.The hydrogen bond action between EVA and CBP-DBSA can improve the interface affinity of two phases,EVA was a better matching matrix,which can be blended with CBP-DBSA to prepare anti-static composite.