Abstract
Electric conductive plastic composites have a wide potential for commercial applications, some examples are EMI shielding housings and components in automotive industry and in consumer electronics, equipments in health care sector and fuel cell components.
A phenomenon in conductive composites, especially in composites with carbon based fillers, is change of thermal induced change in conductivity as a result of morphological transitions. Usually the observed changes are practically irreversible. The phenomenon may cause increasing resistivity, usually called as “positive temperature coefficient” (PTC) or decreasing resistivity, called “negative temperature coefficient (NTC), where the new morphology created by heat treatment is more favorable for electric conductivity compared to the original state.
The existence of NTC is a sing of the lost potential in material design and processing. Therefore detailed information about the phenomenon gives us tools to develop high performance conductive materials. It this paper we discuss about NTC phenomenon observed in PP composites with CNT or in‐situ synthesized CNT‐PANi hybrid nanofiller with an amphiphilic dispersing agent.
The goal of the paper is not to present a comprehensive model of this phenomenon; we present some experimental results which may be related to polymer‐filler interactions.
These details are a part of this complicated phenomenon.
A phenomenon in conductive composites, especially in composites with carbon based fillers, is change of thermal induced change in conductivity as a result of morphological transitions. Usually the observed changes are practically irreversible. The phenomenon may cause increasing resistivity, usually called as “positive temperature coefficient” (PTC) or decreasing resistivity, called “negative temperature coefficient (NTC), where the new morphology created by heat treatment is more favorable for electric conductivity compared to the original state.
The existence of NTC is a sing of the lost potential in material design and processing. Therefore detailed information about the phenomenon gives us tools to develop high performance conductive materials. It this paper we discuss about NTC phenomenon observed in PP composites with CNT or in‐situ synthesized CNT‐PANi hybrid nanofiller with an amphiphilic dispersing agent.
The goal of the paper is not to present a comprehensive model of this phenomenon; we present some experimental results which may be related to polymer‐filler interactions.
These details are a part of this complicated phenomenon.
| Original language | English |
|---|---|
| Title of host publication | AIP Conference Proceedings |
| Subtitle of host publication | 5th International Conference on Times of Polymers (TOP) and Composites |
| Publisher | American Institute of Physics (AIP) |
| Pages | 85-88 |
| ISBN (Print) | 978-0-7354-0804-3 |
| DOIs | |
| Publication status | Published - 2010 |
| MoE publication type | A4 Article in a conference publication |
| Event | 5th International Conference on Times of Polymers (TOP) and Composites - Ischia, Italy Duration: 20 Jun 2010 → 23 Jun 2010 |
Publication series
| Series | AIP Conference Proceedings |
|---|---|
| Volume | 1255 |
| ISSN | 0094-243X |
Conference
| Conference | 5th International Conference on Times of Polymers (TOP) and Composites |
|---|---|
| Country/Territory | Italy |
| City | Ischia |
| Period | 20/06/10 → 23/06/10 |
Keywords
- Conducting polymers
- Electrical and magnetic properties related to treatment conditions
- Nanoparticles in polymers
- Nanotubes
- Organic-inorganic hybrid nanostructures
- Reinforced polymers and polymer-based composites
- Solids
