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High Performance/High Functional Film of Rigid Rodlike Polymers Prepared by Flow-Electrolyzing Method

流电解法制备高性能/高功能刚性棒状聚合物薄膜

基本信息

批准号：
62850154
负责人：
TAKAYANAGI Motowo
金额：
$ 5.31万
依托单位：
Kyushu Sangyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

Poly(p-phenylene terephthalamide) (PPTA) is converted into polyanion with negative charge on nitrogen atom by the reagent formed by the reaction of sodium hydride and dimethylsulfoxide (DMSO) and dissolves in DMSO to form a transparent dark red dolution. The electrolysis of PPTA polyanions formed a uniform PPTA gel swollen by DMSO on the rotating anode. This is characteristic of the ions of rigid rod-like molecules because the electrolysis of flexible aramid copolymer anion could not be electrodeposited. By increasing the shear rate and friction by use of coexistent polymer in the electrolytic solution, an anisotropic film of PPTA with the modulus more than 10 GPA is obtained after extracting the coexistent polymer.An electroconductive polymer composite is prepared by using the PPTA film as a polymer support and electrochemically polymerizing pyrrole with dopant. The solvated state and coarse texture of the PPTA film enable the composite formation. The mechanical properties of the composite film are close to those of the aramid film and the conductivity is 60 S・cm^<-1> for the composite containing 60% of polypyrrole. These properties of the composite are further improved by the treatment of aqueous HC1, with which tosylate anion, the dopant of polypyrrole, is partly exchanged with chlorine ion. Mor-phological studies proved that the structure of the composite is two-phase and the both components in-terpenetrate mutually. A polyaniline/PPTA composite film is prepared with a similar manner as above and applied to the cathode material for a secondary battery. The electrical properties of the electroconductive polymer is not reduced by the incorporation with the PPTA film. Further the mechanical properties of the conductive polymer are found largely improved by the composite formation.

聚对苯二甲酰对苯二胺（PPTA）通过氢化钠与二甲基亚砜（DMSO）反应生成的试剂转化为氮原子上带负电荷的聚阴离子，并溶解在DMSO中，形成透明的暗红色溶液。 PPTA聚阴离子的电解在旋转阳极上通过DMSO溶胀形成均匀的PPTA凝胶。这是刚性棒状分子离子的特征，因为柔性芳纶共聚物阴离子的电解不能电沉积。利用共存聚合物在电解液中增加剪切速率和摩擦力，提取共存聚合物后得到模量大于10GPA的PPTA各向异性薄膜。以PPTA薄膜为聚合物载体，通过电化学聚合吡咯和掺杂剂制备导电聚合物复合材料。 PPTA 薄膜的溶剂化状态和粗糙的结构有利于复合材料的形成。复合薄膜的机械性能与芳纶薄膜接近，含60%聚吡咯的复合材料的电导率为60 S·cm^<-1>。通过HCl水溶液的处理，进一步改善了复合材料的这些性能，其中甲苯磺酸根阴离子（聚吡咯的掺杂剂）部分地与氯离子交换。形态研究证明该复合材料的结构是两相的，并且两种组分相互渗透。以与上述类似的方式制备聚苯胺/PPTA复合膜，并将其应用于二次电池的正极材料。导电聚合物的电性能不会因与PPTA膜的结合而降低。此外，发现复合材料的形成大大改善了导电聚合物的机械性能。