Thermal analysis of a new thiophene derivative and its copolymer

A pyrolysis mass spectrometry study of polythiophene copolymers

“…This may point out that low molecular weight DATE oligomers or DATE terminal groups were absent, which may point out that low molecular weight DATE oligomers or DATE terminal groups were absent in the copolymer unlike the corresponding homopolymer PDATE. The thiophene trimer/monomer peak intensity ratio increased in the order PTh > P(DATEecoeTh) > PDATE (0.24 > 0.02 > 0.01) [15,18] confirming that the ratio is largest for the PTh homopolymer and smallest for PDATE as expected. Thus, it is obvious that polymerization of both monomers has taken place.…”

“…The most abundant product was BF 2 due to degradation of dopant for samples PDATE, PTh and their mechanical mixture [15,18]. For the mechanical mixture dopant/C 4 H 7 ratio was 4.8:1 whereas for the copolymer this ratio was decreased to 1:5.4, about 25-fold decrease (Fig.…”

“…Another point that should be noted is the decrease in the relative intensities of DATE based fragments around 275 C with respect to the value around 440 C for P(DATEecoeTh). Evolution of DATE based products shifted to high temperatures pointing out that polymerization of DATE in the presence of thiophene yielded more stable polymer chains compared to PDATE and the mechanical mixture [15]. This may point out that low molecular weight DATE oligomers or DATE terminal groups were absent, which may point out that low molecular weight DATE oligomers or DATE terminal groups were absent in the copolymer unlike the corresponding homopolymer PDATE.…”

“…The syntheses of terepthalic acid bis-(2-thiophen-3-yl-ethyl)-ester (TATE) and decanedioic acid bis-(2-thiophen-3-yl-ethyl) ester (DATE) have been described in detailed elsewhere [15,16].…”

“…We used direct pyrolysis mass spectrometry to investigate the structural and thermal characteristics of poly(decanedioic acid bis-(2-thiophen-3-yl-ethyl)ester) and poly(terephthalic acid bis-(2-thiophen-3-yl-ethyl)ester) which were electrochemically prepared in a recent study [15]. The monomers, decanedioic acid bis-(2-thiophen-3-yl-ethyl)ester (DATE) and terephthalic acid bis-(2-thiophen-3-yl-ethyl)ester (TATE) have an important feature that define their relevance to our studies; these molecules are substituted at b-position of thiophene ring which is expected to provide an improvement in mechanical features of the corresponding polymer.…”