Polyurethane-Nitrile Rubber Blends

Desai, Sonal; Thakore, I. M.; Brennan, Anthony B.; Devi, Surekha

doi:10.1081/ma-100103875

Cited by 22 publications

(29 citation statements)

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“…Similar results were obtained by Desai et al who studied polyurethane and nitrile rubber blends [18]. They correlated this phenomenon to the existence of satisfactory rubber matrix adhesion in the composition of interest, which prevented interfacial decohesion.…”

Section: Vulcanized Blends Characterizationsupporting

confidence: 78%

Modification of NR/BR blend with unsaturated thermo plastic polyurethane; polyurethane synthesis, blend morphology, vulcanization, and vulcanizate properties

2006

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The unsaturated polyurethane (PU) was synthesized, characterized, and used in rubber compound. To study the effect of PU incorporation in the blend a systematic approach was used where PU was added to the natural rubber (NR), butadiene rubber (BR), and NR/BR blends. Different un-vulcanized and vulcanized compounds were characterized and the vulcanization process was investigated. It was observed that the synthesized PU was able to crosslink with the rubber compounds during the vulcanization process. The lowered temperature of melting indicated a better processability of the composites containing thermoplastic PU which melted at processing temperature, thereby allowing improvement in blend viscosity mold flow and to some extent in its homogeneity, although the mechanical properties such as hardness, tensile strength, modulus, and elongation at break did not differ significantly from the properties of elastomer blends without PU. The thermal stability of compounds with PU did not significantly worsen.

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Section: Vulcanized Blends Characterizationsupporting

confidence: 78%

Modification of NR/BR blend with unsaturated thermo plastic polyurethane; polyurethane synthesis, blend morphology, vulcanization, and vulcanizate properties

2006

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“…The activation energy (Table 2) for glass transition was calculated from following Eq. (2) (Desai, Thakore, Brennan, & Devi, 2001).…”

Section: Resultsmentioning

confidence: 98%

Organically modified nanosized starch derivatives as excellent reinforcing agents for bionanocomposites

Valodkar

Thakore

2011

Carbohydrate Polymers

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“…The mechanical and tribological properties of the blends were researched. PU/NBR blends were prepared by Desai et al [17] through a combination of solution blending and mastication process. However, the use of large quantity of organic solvents and complicated procedures limited the application of the method.…”

mentioning

confidence: 99%

Novel blends of acrylonitrile butadiene rubber and polyurethane-silica hybrid networks

Tan¹,

Wang²,

Tai³

et al. 2012

Express Polym. Lett.

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Abstract. Novel blends of acrylonitrile butadiene rubber (NBR) and polyurethane-silica (PU-SiO 2 ) hybrid networks have been prepared by melt blending. The PU-SiO 2 hybrid networks were formed via the reaction of NCO groups of NCO-terminated PU prepolymer and OH groups of SiO 2 in the absence of an external crosslinking agent (i.e. alcohols and amines) during the curing process of NBR. Both in the neat PU-SiO 2 system and the NBR/(PU-SiO 2 ) system, the NCO-terminated PU prepolymer could be crosslinked by SiO 2 to form PU-SiO 2 hybrid networks. The effects of PU-SiO 2 introduction into the NBR, on the properties of the resulting blends were studied. It was found that the vulcanization was activated by the incorporation of PU-SiO 2 . Transmission electronic microscopy (TEM) studies indicated that the interpenetration and entanglement structures between NBR and PU-SiO 2 increased with increasing PU-SiO 2 content and the quasi-interpenetrating polymer networks (quasi-IPN) structures were formed when the PU-SiO 2 was 50 wt% in the NBR/(PU-SiO 2 ) systems. The microstructures formed in the blends led to good compatibility between NBR and PU-SiO 2 and significantly improved the mechanical properties, abrasion resistance and flex-fatigue life of the blends.

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Polyurethane-Nitrile Rubber Blends

Cited by 22 publications

References 0 publications

Modification of NR/BR blend with unsaturated thermo plastic polyurethane; polyurethane synthesis, blend morphology, vulcanization, and vulcanizate properties

Modification of NR/BR blend with unsaturated thermo plastic polyurethane; polyurethane synthesis, blend morphology, vulcanization, and vulcanizate properties

Organically modified nanosized starch derivatives as excellent reinforcing agents for bionanocomposites

Novel blends of acrylonitrile butadiene rubber and polyurethane-silica hybrid networks

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