Physical Constants of Rubbery Polymers

Furuta, Isao; Kimura, Shin-ichi; Iwama, Masamichi

doi:10.1002/0471532053.bra023

Cited by 17 publications

(19 citation statements)

References 51 publications

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“…It is also observed from Fig. 3b that for the comparable crosslink density up to around 70-75 wt% of toluene in feed NR shows higher sorption than SBR but the opposite trend is observed at higher concentration range which may be ascribed to closeness of solubility parameter [19] of SBR with respect to toluene resulting in higher sorption at high feed concentration of toluene. However, at low concentration of toluene, methanol, which is present at high concentration is not absorbed to an appreciable extent due to presence of styrene moiety in SBR and thus causing less total sorption.…”

Section: Effect Of Feed Concentration On Sorption Isothermmentioning

confidence: 65%

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Separation of organic mixtures by pervaporation using crosslinked rubber membranes

Ray

2006

Journal of Membrane Science

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Section: Effect Of Feed Concentration On Sorption Isothermmentioning

confidence: 65%

“…The crosslink density of both NR and SBR were calculated from the above equation. The values of interaction parameter for the toluene-rubber systems were obtained from literature [19]. The values of crosslinked densities as calculated from the above equation are given in Table 1.…”

Section: Crosslink Density By Chemical Methodsmentioning

confidence: 99%

Separation of organic mixtures by pervaporation using crosslinked rubber membranes

Ray

2006

Journal of Membrane Science

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“…To unambiguously confirm the influence of fillers and ILs on the course and efficiency of vulcanization, additional studies were performed to complement the DSC results. The cross-link density of the vulcanizates (m e ) was determined by equilibrium swelling in toluene, based on the Flory-Rehner equation [20] using the Huggins parameter of the elastomer-solvent (toluene) interaction [21]…”

Section: Preparation and Characterization Of Rubber Compoundsmentioning

confidence: 99%

Thermal characterization of the effect of fillers and ionic liquids on the vulcanization and properties of acrylonitrile–butadiene elastomer

Maciejewska

Sowińska

2019

J Therm Anal Calorim

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Different thermal analysis techniques were used to study the effect of fillers and ionic liquids (ILs) on the vulcanization process, thermal and dynamic mechanical properties of acrylonitrile-butadiene elastomer (NBR). The products of the studies were composites of NBR filled with hydrotalcite, nanosized silica or carbon black. ILs such as 1-butyl-1-methylpyrrolidinium (BMpyrrolBF 4), 1-butyl-4-methylpyridinium (BMpyrBF 4) or 1-butyl-1-methylpiperidinium (BMpipBF 4) tetrafluoroborates were applied to improve the dispersion degree of the curatives and filler particles in the elastomer and to increase the efficiency of vulcanization. The differential scanning calorimetry results indicated that ILs reduced the vulcanization temperature of NBR compounds and increased the homogeneity of cross-link distribution in the elastomer network. NBRs filled with carbon black or silica exhibited similar thermal stabilities, whereas hydrotalcite reduced the temperature of thermal decomposition. The lowest mechanical loss factors were determined for vulcanizates filled with nanosized silica.

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“…The Huggins parameter of the SBR-solvent interaction (v) was calculated from the Eq. (1) [31], where V r is the volume fraction of elastomer in the swollen gel.…”

Section: Preparation and Characterization Of Rubber Compoundsmentioning

confidence: 99%

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

Maciejewska

Zaborski

2018

Polym. Bull.

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The aim of this work was to study the activity of several alkylimidazolium salts of bis(trifluoromethylsulfonyl)imides to obtain a very fast vulcanization of the butadiene-styrene (SBR) elastomer. Ionic liquids (ILs) such as alkylimidazolium salts with ethyl-, propyl-, butyl-, hexyl-, decyl-, dodecyl-, and hexadecyl chains in the cation together with nanosized zinc oxide are used to develop elastomer composites with very short vulcanization time and a reduced amount of vulcanization activator. In this article, we discuss the effect of the ILs with respect to the length of alkyl chain in their cation on the vulcanization kinetics of rubber compounds. The influence of ILs on the crosslink density as well as the mechanical properties of the vulcanizates and their resistance to thermo-oxidative and UV aging were also studied. ILs resulted in a shortened optimal vulcanization time and reduced the onset vulcanization temperature compared to zinc oxide containing rubber compound. This is very important from a technological point of view. A considerable increase in the crosslink density of vulcanizates was also observed.

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Physical Constants of Rubbery Polymers

Cited by 17 publications

References 51 publications

Separation of organic mixtures by pervaporation using crosslinked rubber membranes

Separation of organic mixtures by pervaporation using crosslinked rubber membranes

Thermal characterization of the effect of fillers and ionic liquids on the vulcanization and properties of acrylonitrile–butadiene elastomer

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

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