Blends of polyaniline with nitrilic rubber

Abstract

Nitrilic rubbers containing 29 or 45% of acrylonitrile were blended with polyaniline doped with different acids (chloridric, dodecylbenzenesulfonic, tetrapropylbenzenesulfonic, and p-toluenesulfonic acids). The blends were prepared by mechanical mixing in a roll-mill and vulcanized in a hot press. The volumetric conductivities and mechanical properties were evaluated. The results show that the polyaniline concentration strongly affects the behavior of the blends. Increasing the polyaniline content from 50 to 100 phr induces an increase in the electric conductivity from 10 Ϫ10 to 10 Ϫ8 S cm Ϫ1 ; however, the blends become harder and more brittle than the crude rubber. Addition of polyaniline lowered the crosslinking degree, but produced a reinforcing effect in the elastomer.

Structure and design of polymers for durable, stretchable organic electronics

“…[116][117][118] Literature since the late 20th century is rich in examples of blends and composites containing conjugated polymers, 119 such as P3HT (2b)/polystyrene, [120][121][122] or PA (1)/PE 123,124 with the purpose of improving the mechanical stability of the conjugated polymer applications, namely field-effect transistors. The conducting polymer polyaniline (3), in particular, has been extensively studied in elastomer blends with rubbers including polyurethanes (PUs), 125 nitrile rubber, 119,126,127 polystyrene-b-poly(ethylene-co-butylene)-bpolystyrene 128,129 and others. To move forward in the improvement of both electrical and mechanical properties of stretchable electronics, it is necessary to understand how molecular interactions in blends and nanocomposites affect the material's performance.…”

Electromechanical responses of poly(3-thiopheneacetic acid)/acrylonitrile-butadiene rubbers

“…Crude acrylonitrile-butadiene rubber was purified by dissolving it in CHCl 3 (AR grade, BDH) and coagulating it in methanol, and was subsequently dried (Vallim et al, 1999) [6]. The purified rubber was dissolved in CHCl 3 to obtain a rubber solution prior to casting into films with a thickness of around 1 mm.…”

“…The presence of fillers, such as electrically conductive additives, in elastomers has been observed to change their electrical, dielectric, and mechanical properties, along with their morphology [3,5,6]. The incorporation of the conductive materials into dielectric elastomers has been widely studied as both magnetorheological (MR) and electrorheological (ER) fluids.…”

“…Keywords : smart polymers, electrorheological properties, dielectric properties, acrylonitrile-butadiene rubber, poly(3-thiopheneacetic acid) eXPRESS Polymer Letters Vol.2, No.12 (2008) [866][867][868][869][870][871][872][873][874][875][876][877] Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2008.101 The presence of fillers, such as electrically conductive additives, in elastomers has been observed to change their electrical, dielectric, and mechanical properties, along with their morphology [3,5,6]. The incorporation of the conductive materials into dielectric elastomers has been widely studied as both magnetorheological (MR) and electrorheological (ER) fluids.…”

Compósitos de borracha natural com polianilina

“…Encontra-se na literatura vários trabalhos onde se descreve a obtenção de compósitos de PANI com elastomeros, utilizando diferentes métodos de preparo como mistura termomecâ-nica [8,9] , "casting" [10][11][12][13] , eletroquímico e emulsão [14] . Neste trabalho, compósitos de borracha natural com polianilina foram obtidos através da polimerização da anilina por emulsão na presença de borracha natural, toluol e do ácido dodecilbenzeno sulfônico -DBSA.…”