Polypropylene films are widely used in industry, especially for packaging purposes.
However, these films become statically charged when they are subject to friction.
The accumulation of charges in some applications can be harmful, especially for the
electronic devices and can cause undesirable appearance due to the attraction of
dusts. Furthermore, minimum susceptibility to mechanically induced surface
damage is a desired property since scratches reduce the mechanical strength and the
bright texture of the film in packaging of commercial items and limit the
applications of the material.
This study aims to provide antistatic character to polypropylene films by the
utilization of conductive fillers which function independent of humidity and enhance
their scratch resistance by means of aromatic based additives.
Polypyrrole-polypropylene composites including 2%, 5%, 7% and 9% pyrrole were
synthesized by chemical modification. 2% of pyrrole was adequate to provide
antistatic character to the films. Moreover, they attained conductive property when
the pyrrole content exceeds 7%.
Polypropylene based materials containing four different compositions of
1,7-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, pphenylene
diamine and hydroquinone were prepared by mechanical mixing. Scratch
resistance of polypropylene films increased significantly with the insertion of
additives. The material containing 2% 1,7-dihydroxynaphthalene introduced the
highest enhancement by more than 60%. Moreover, mechanical analysis results
showed that insertion of the additives except hydroquinone increased Young& / #8217 / s
modulus of the polypropylene films. In addition, tensile strength and elongation at
break of polypropylene films were enhanced significantly with insertion of the
additives regardless of the additive type.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12609067/index.pdf |
| Date | 01 December 2007 |
| Creators | Kurkcu, Pinar |
| Contributors | Bayramli, Erdal |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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