کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296688 | 1498349 | 2010 | 6 صفحه PDF | دانلود رایگان |

The synthesis, thermal, electrochemical and proton-conducting properties of copolymers based on 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and 1-vinyl-1,2,4-triazole (VTri) were investigated. The copolymers were synthesized by free-radical copolymerization of the corresponding monomers at several monomer feed ratios to obtain poly(VTri-co-AMPS) copolymer electrolytes. The final structures of the copolymers were confirmed by FT-IR and 1H NMR methods. The composition of the copolymers was determined by elemental analysis. TGA indicates that the copolymers are thermally stable up to approximately 250 °C. The copolymer samples have higher glass transition temperatures as shown by DSC. Cyclic voltammetry results illustrated that the electrochemical stability domain extends over 3 V. Charge transport relaxation times were derived from complex electrical modulus formalism (M*). The temperature dependence of conductivity relaxation times showed that the proton conductivity occurs by hopping mechanism via structure diffusion. In the absence of humidity, the copolymer electrolyte, poly(VTri-co-AMPS) (S2) showed proton conductivity of 2 × 10− 3 S/cm at 130 °C, which is far higher than in imidazole based copolymers.
Journal: Solid State Ionics - Volume 181, Issues 11–12, 29 April 2010, Pages 525–530