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Interactions between CO and Poly(p-phenylene vinylene) as Induced by Ion-Exchanged Zeolites
Conductive and Electroactive Polymers Research Unit, and Center of Petroleum Petrochemicals and Advanced Materials, The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
Department of Materials and Production Technology Engineering, King Mongkut’s University of Technology, Bangkok 10800, Thailand
* Author to whom correspondence should be addressed.
Received: 28 September 2009; in revised form: 29 November 2009 / Accepted: 3 December 2009 / Published: 8 December 2009
Abstract: The effects of zeolite type, ion-exchanged level, and ion type on the electrical conductivity responses of poly(p-phenylene vinylene) (PPV), doped poly(p-phenylene vinylene) (dPPV) and zeolite composites under CO exposures were investigated. The electrical sensitivity of dPPV/Cu+-ZSM5(Si/Al = 23) system shows a negative sensitivity value of −0.154, while the Na+ system gives a positive sensitivity of 1.48. Based on FTIR and TPD data, the positive response of PPV/Na+-ZSM5 stems from the CO molecules acting as a secondary dopant. On the other hand, the negative response of PPV/Cu+-ZSM5 originates from the fact that CO molecules are selectively adsorbed on Cu+ sites rather than C+ sites of doped PPV.
Keywords: conductive polymer; electrical conductivity; CO; ion-exchanged zeolites
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Thongchai, N.; Kunanuruksapong, R.; Niamlang, S.; Wannatong, L.; Sirivat, A.; Wongkasemjit, S. Interactions between CO and Poly(p-phenylene vinylene) as Induced by Ion-Exchanged Zeolites. Materials 2009, 2, 2259-2275.
Thongchai N, Kunanuruksapong R, Niamlang S, Wannatong L, Sirivat A, Wongkasemjit S. Interactions between CO and Poly(p-phenylene vinylene) as Induced by Ion-Exchanged Zeolites. Materials. 2009; 2(4):2259-2275.
Thongchai, Nareerat; Kunanuruksapong, Ruksapong; Niamlang, Sumonman; Wannatong, Ladawan; Sirivat, Anuvat; Wongkasemjit, Sujitra. 2009. "Interactions between CO and Poly(p-phenylene vinylene) as Induced by Ion-Exchanged Zeolites." Materials 2, no. 4: 2259-2275.