Enhancement of electro-conductivity of polyethylene/polyacetylene mixture by interfacial electro-polymerization

界面电聚合增强聚乙烯/聚乙炔混合物的导电性

基本信息

批准号：
09650750
负责人：
KAWAGUCHI Akiyoshi
金额：
$ 2.11万
依托单位：
Ritsumeikan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

Ultra-high molecular weight polyethylene (UHMWPE) was crystallized from the solution in decaline in the state of gel. Polyacetylene (PA) was polymerized in the gel. The thus prepared mixture of UHMWPE and PA was processed in the form of sheet by pressing into a mold. The electro-conductivity of the as-prepared sheet reached 10ィイD1-1ィエD1 S/cm by doping Iodine. The electro-conductivity of drawn sheet in the direction parallel to the drawn direction(αμ) is 10ィイD1-6ィエD1 S/cm and that in the transverse direction(σィイD2γィエD2) 10ィイD1-10ィエD1 S/cm. The ratio of μ/σィイD2γィエD2 is 10ィイD14ィエD1. Although the electro-conductivity is expected to enhance by increase of molecular orientation by drawing, the value of drawn film is smaller than that of undrawn film, and to the contrary, it molecular orientation by drawing, the value of drawn film is smaller than that of undrawn film, and to the contrary, it decreases with further drawing. Two reasons are considered : 1)The PA is oxidized in the process of drawing since it was drawn in the air and 2)the connectivity of PA in the UHMWPE matrix is broken by drawing. The same experiment was done by preparing the mixture of isotactic polypropylene(iPP) and PA. Theαμand αィイD2γィエD2 of the drawn iPP/PA sheet were 10ィイD1-5ィエD1 S/cm and 10ィイD1-10ィエD1 S/cm, respectively. The ratio of σμ/σィイD2γィエD2 is as high as 10ィイD15ィエD1. Although the absolute values of electro-conductivity of these sheets were not always high, their high anisotropy of the drawn samples is significant result of the present work, because so far there are no such materials as this.Our final object is to prepare a thin, electro-conductive film by electro-polymerization of other electro-conductive polymer on the UHMWPE/PA mixture, by using it as an electrode. The electro-conductivity of the present mixture is not high enough for the purpose. It will be tried to improve the electro-conductivity of the mixture.

超高分子量聚乙烯(UHMWPE)从凝胶状态的十氢化萘溶液中结晶出来，在凝胶中聚合由此制备的UHMWPE和PA的混合物，通过压制成片材的形式。通过掺杂碘，所制备的片材的电导率达到10D1-1D1S/cm。与拉伸方向平行的方向(αμ)为10D1-6D1S/cm，横向(σD2D2)为10D1-10D1S/cm。μ/σD2γD2的比率为10D14D1。通过拉伸增加分子取向，拉伸薄膜的值为比未拉伸薄膜小，相反，通过拉伸，其分子取向，拉伸薄膜的值比未拉伸薄膜小，相反，随着进一步拉伸，它减小： 1) 。由于PA是在空气中拉伸，因此在拉伸过程中会被氧化，2）拉伸破坏了UHMWPE基体中PA的连通性通过制备等规聚丙烯（iPP）和PA的混合物进行了相同的实验。。拉伸的iPP/PA片材的αμ和αD2γD2分别为10D1-5D1S/cm和10D1-10D1S/cm，但σμ/σD2γD2的比值高达10D15D1。这些片材的厚度并不总是很高，它们的各向异性很高所抽取样品的结果是目前工作的重要成果，因为到目前为止还没有这样的材料。我们的最终目标是通过在 UHMWPE/ 上电聚合其他导电聚合物来制备薄的导电薄膜。 PA混合物，通过将其用作电极，目前的混合物的电导率对于该目的而言不够高，将尝试改善该混合物的电导率。