Electronic Conductive Microporous Polymer-Based Structures

✍ Scribed by Dinçer Yakisir; Frej Mighri; Mosto Bousmina

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 352 KB
• Volume: 27
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200600380

✦ Synopsis

Abstract

Summary: This study aims at developing a highly electronic conductive microporous structure from thermoplastic polymers filled with carbon black (CB) and graphite (GR). The matrix was a low viscosity poly(propylene) (PP) and the conductive additives were composed of high specific surface area CB and synthetic flake GR. Conductive blends were first developed using a corotating twin‐screw extruder. Rheological properties and conductivities of these blends were then characterized as a function of blend composition. Blends that show the best compromise between electronic conductivity and processability were subsequently extruded through a sheet die to obtain films of around 500 µm in thickness. These films were then stretched in two successive steps under controlled temperature and stretching rate to generate a film of controlled microporous structure.

TEM of film made from a 50 wt.‐% PP/25 wt.‐% CB/25 wt.‐% GR blend after stretching.

magnified imageTEM of film made from a 50 wt.‐% PP/25 wt.‐% CB/25 wt.‐% GR blend after stretching.