UV曝光對聚苯乙烯-聚苯胺核殼型態導電薄膜導電率熱穩定性之影響
The Effect of UV Irradiation on The Thermal Stability of Conductivity of Conductive Films Based on Polystyrene-Polyaniline Core-shell Latexes
Date Issued
2007
Date
2007
Author(s)
Chen, Wen-Jung
DOI
zh-TW
Abstract
The purpose of the study is to discuss the effect of UV irradiation on the conductivity of conductive films based on polystyrene(PS)-polyaniline (PANI) core-shell latexes. Furthermore, conduction mechanism and aging effect on conductivity of conductive films after UV irradiation were investigated.
The PS-PANI core-shell latexes were synthesized; conductive films were made by casting and heating the PS-PANI core-shell latex particles above the glass transition temperature of polystyrene. After exposure to UV irradiation, the conductivity of conductive films decreased slightly. In contrast, the conductivity decreased obviously after UV irradiation when photoinitiator was added to the PS-PANI film. The aging effect on conductivity of conductive films in different atmosphere was investigated. Among three types of conductive films (unexposed, exposed, and exposed with photoinitiator), the exposed conductive film with photoinitiator has the best thermal stability due to crosslinked structures formed during UV irradiation. Moreover, for all the conductive films, the temperature dependence of conductivity follows the law: σ/σ0＝exp[-(T0/T)0.5]. It indicated the conduction proceeds through hopping between small conducting grains separated by insulating barriers.
Subjects
核殼乳膠粒子
導電薄膜
聚苯胺
UV曝光
熱穩定性
core-shell latex
conductive film
polyaniline
thermal stability
UV exposure
Type
thesis
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