Synthesis, Characterization and Properties of Conductive Elastomeric Composites Based on Polypyrrole and Short Nylon-6 Fiber
Year: 2012
Type: dissertation
Abstract: The search for new materials especially those possessing special\nproperties continues at a great pace because of ever growing demands of the\nmodern life. The focus on the use of intrinsically conductive polymers in\norganic electronic devices has led to the development of a totally new class of\nsmart materials. Polypyrrole (PPy) is one of the most stable known conducting\npolymers and also one of the easiest to synthesize. In addition, its high\nconductivity, good redox reversibility and excellent microwave absorbing\ncharacteristics have led to the existence of wide and diversified applications for\nPPy. However, as any conjugated conducting polymer, PPy lacks processability,\nflexibility and strength which are essential for industrial requirements. Among\nvarious approaches to making tractable materials based on PPy, incorporating\nPPy within an electrically insulating polymer appears to be a promising method,\nand this has triggered the development of blends or composites. Conductive\nelastomeric composites of polypyrrole are important in that they are composite\nmaterials suitable for devices where flexibility is an important parameter.\nMoreover these composites can be moulded into complex shapes.\nIn this work an attempt has been made to prepare conducting elastomeric\ncomposites by the incorporation of PPy and PPy coated short Nylon-6 fiber\nwith insulating elastomer matrices- natural rubber and acrylonitrile butadiene\nrubber. It is well established that mechanical properties of rubber composites\ncan be greatly improved by adding short fibers. Generally short fiber\nreinforced rubber composites are popular in industrial fields because of their\nprocessing advantages, low cost, and their greatly improved technical\nproperties such as strength, stiffness, modulus and damping. In the present\nwork, PPy coated fiber is expected to improve the mechanical properties of the\nelastomer-PPy composites, at the same time increasing the conductivity. In\naddition to determination of DC conductivity and evaluation of mechanical\nproperties, the work aims to study the thermal stability, dielectric properties\nand electromagnetic interference shielding effectiveness of the composites.\nThe thesis consists of ten chapters.
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1504076750