Polyfuran, polythiophene and their blend as novel antioxidants for styrene- butadiene rubber vulcanizates

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

“…Actually at 190˚C its weight loss is nearly 5%, which means that there is probably some degradation of the polymer, at least a strong decrease of the chain lengths and/or opening of furan ring. It is know that furan ring is less stable than thiophene ring [43]. When furane ring is opened two ketones units are formed (dicarbonyl moieties).…”

New bridged oligofuran for optoelectronic applications

“…As it is known, the linear extrapolation method has been successfully employed to investigate several series of polymers [26], we determined the main electronic parameters of the parent polymers of the previous oligomers by the linear extrapolation method, as recapitulated in Table 1. It is noted also that the band gap of polyfuran (2.35 eV) [8] could be seriously reduced through bridging process using electron donating groups [X:>SiH 2 due to the effect of the conjugated form of acceptor groups. The vertical excited energies (nm) and their oscillator strengths in the ground states of octafuran bridged by electron accepting and donating groups calculated with TD//B3LYP/6-31G(d) and ZINDO, are depicted in Tables 2 and 3, respectively.…”

“…Therefore, intensive efforts have been undertaken to enhance their physicochemical properties by developing new synthesis ways [2,3] and doping processes [4]. Furthermore and recently, it was demonstrated that bridging procedure is considered as a new way to modulate optoelectronic properties of several pentacyclic polymers such as polythiophene (PTh) and polypyrrole (PPy) [5].…”

An excellent ozone-resistant polymethylvinylsiloxane coating on natural rubber by thiol-ene click chemistry

“…However, the ozone resistance of NR is not good because of its unsaturated chain structure [1]. Numerous works have been conducted to improve the ozone resistance of NR by adding paraffin or antioxidant in NR matrix or by blending NR with other rubbers with good ozone-resistance [2][3][4]. The disadvantages of these methods are the deterioration of processability and mechanical properties of NR.…”