Document Type
Article
Publication Date
1-1-2008
Abstract
Polyurethane (PU) is one of the industrially important polymers which offers a combination of unique properties and meets a wide range of demanding application. Electrical conductivity and dielectric properties of polyurethane/graphite composites were investigated in this paper. Moisture Cured Polyurethane was prepared with varying NCO/OH ratio 2.0, 2.2 and 2.4 by polyoxytetramethylene glycol (PTMO) Mw 2000 and Toluene diisocyanate (TDI). Graphite powder of 0 to 12.5 vol% was dispersed in PU to form electro conductive composites. Percolation concentrations were determined to be as (9±1), (9±2) and (10±3) vol. % for the NCO/OH ratio of 2.0, 2.2 and 2.4 respectively. It shows that percolation concentration does not have significant change as the NCO/OH ratio increases. The dielectric properties of the composites were investigated in the frequency range of 1 KHz to 10MHz. It was found that PU composites became electro-conductive when filled with 9 to 10.0% of the filler and support well the dc conductivity results.
Publication Title
Jurnal Fizik Malaysia
Recommended Citation
Abd Majid, Wan Haliza, "Electrical Properties of Polyurethane Graphite Composites" (2008). Research Publications (2006 to 2010). 1431.
https://knova.um.edu.my/research_publications_2006_2010/1431
Divisions
PHYSICS