Search Results - "Valentin, J. L."

Uncertainties in the Determination of Cross-Link Density by Equilibrium Swelling Experiments in Natural Rubber by Valentín, J. L, Carretero-González, J, Mora-Barrantes, I, Chassé, W, Saalwächter, K

“…Equilibrium swelling is a feasible and simple experiment to determine the cross-link density of networks. It is the most popular and useful approach; however,…”
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Inhomogeneities and Chain Dynamics in Diene Rubbers Vulcanized with Different Cure Systems by Valentín, J. L, Posadas, P, Fernández-Torres, A, Malmierca, M. A, González, L, Chassé, W, Saalwächter, K

“…In this study, we focus on qualitative differences in the network structure and dynamics of natural as well as poly(butadiene) rubber in dependence of the cure…”
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Novel Experimental Approach To Evaluate Filler−Elastomer Interactions by Valentín, J. L, Mora-Barrantes, I, Carretero-González, J, López-Manchado, M. A, Sotta, P, Long, D. R, Saalwächter, K

“…Novel information on filler−elastomer interactions is obtained by combining solid-state 1H low-field NMR spectroscopy and equilibrium swelling experiments…”
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Structure of Poly(vinyl alcohol) Cryo-Hydrogels as Studied by Proton Low-Field NMR Spectroscopy by Valentín, J. L, López, D, Hernández, R, Mijangos, C, Saalwächter, K

“…The network structure of poly(vinyl alcohol) (PVA) hydrogels obtained by freezing−thawing cycles was investigated by solid-state 1H low-field NMR spectroscopy…”
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Characterization of Network Structure and Chain Dynamics of Elastomeric Ionomers by Means of 1H Low-Field NMR by Malmierca, M. A, González-Jiménez, A, Mora-Barrantes, I, Posadas, P, Rodríguez, A, Ibarra, L, Nogales, A, Saalwächter, K, Valentín, J. L

“…The network structure and chain dynamics of ionic elastomers based on carboxylated nitrile rubber (XNBR) cross-linked with different content of magnesium oxide…”
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Morphology/behaviour relationship of nanocomposites based on natural rubber/epoxidized natural rubber blends by Arroyo, M., López-Manchado, M.A., Valentín, J.L., Carretero, J.

“…In order to analyze the effect of an epoxidized natural rubber (ENR) and filler treatment on the morphology and behavior of natural rubber (NR) nanocomposites,…”
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Effect of entanglements in the microstructure of cured NR/SBR blends prepared by solution and mixing in a two-roll mill by Mansilla, M.A., Valentín, J.L., López-Manchado, M.A., González-Jiménez, A., Marzocca, A.J.

“…[Display omitted] •Preparation methodology influences the blend morphology and network structure.•Better compatibility between rubber phases has been obtained…”
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Swelling of polymer networks with topological constraints: Application of the Helmis-Heinrich-Straube model by Basterra-Beroiz, B., Rommel, R., Kayser, F., Westermann, S., Valentin, J. L., Heinrich, G.

“…For the first time since its formulation in 1986, the theoretical approach proposed by Helmis, Heinrich and Straube (HHS model), which considers the…”
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Synthesis and characterization of biodegradable non-toxic poly(ester-urethane-urea)s based on poly(ε-caprolactone) and amino acid derivatives by Marcos-Fernández, A., Abraham, G.A., Valentín, J.L., Román, J. San

“…Non-toxic biodegradable linear poly(ester-urethane-urea)s with different hydrophilic character were synthesized from poly(ε-caprolactone) as macrodiol,…”
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Effect of dose and temperature on the physical properties of an aliphatic thermoplastic polyurethane irradiated with an electron beam by Adem, E., Angulo-Cervera, E, González-Jiménez, A., Valentín, J.L., Marcos-Fernández, A.

“…The electron beam irradiation of a fully aliphatic thermoplastic polyetherurethane was carried out in air at doses ranging from 50 to 4000kGy at room…”
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Rubber network in elastomer nanocomposites by López-Manchado, M.A., Valentín, J.L., Carretero, J., Barroso, F., Arroyo, M.

“…The influence of inorganic nanoparticles on crosslinking mechanism of elastomers has been evaluated by applying the tube model on equilibrium statistical…”
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Gas transport properties of polypropylene/clay composite membranes by Villaluenga, J.P.G., Khayet, M., López-Manchado, M.A., Valentin, J.L., Seoane, B., Mengual, J.I.

“…Polypropylene membranes modified with natural and organically modified montmorillonite clays were prepared. The permeability, diffusivity and solubility of…”
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Filled poly(2,6-dimethyl-1,4-phenylene oxide) dense membranes by silica and silane modified silica nanoparticles: characterization and application in pervaporation by Khayet, M., Villaluenga, J.P.G., Valentin, J.L., López-Manchado, M.A., Mengual, J.I., Seoane, B.

“…The effects of silica and silane modified silica fillers on the pervaporation properties of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) dense membranes have…”
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Novel anhydrous unfolded structure by heating of acid pre-treated sepiolite by Valentín, J.L., López-Manchado, M.A., Rodríguez, A., Posadas, P., Ibarra, L.

“…Acid activation of sepiolite removed the brucitic magnesium octahedral layers, while the tetrahedral sheets formed fibrous and amorphous silica. The…”
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Natural rubber/clay nanocomposites: Influence of poly(ethylene glycol) on the silicate dispersion and local chain order of rubber network by Carretero-González, J., Valentín, J.L., Arroyo, M., Saalwächter, K., Lopez-Manchado, M.A.

“…A novel preparation of natural rubber (NR)/Na +–montmorillonite (MMT) nanocomposites in only one step by using poly(ethylene glycol) (PEG) has been…”
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Effect of the temperature on the kinetic of natural rubber vulcanization with the sulfur donor agent dipentamethylene thiuram tetrasulphide by Posadas, P, Fernández-Torres, A, Valentín, J.L, Rodríguez, A, González, L

“…The effect of the temperature on the kinetics of vulcanization of natural rubber with the sulfur donor agent dipentamethylene thiuram tetrasulphide (DPTT) was…”
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Measurements of freezing-point depression to evaluate rubber network structure. Crosslinking of natural rubber with dicumyl peroxide by Valentín, J. L., Fernández-Torres, A., Posadas, P., Marcos-Fernández, A., Rodríguez, A., González, L.

“…An experimental approach based on the freezing‐point depression of a solvent in a swollen gel has been developed to characterize the structure of rubber…”
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Effect of oleyl amine on SBR compounds filled with silane modified silica by Valentín, J. L., Mora-Barrantes, I., Rodríguez, A., Ibarra, L., Gonzalez, L.

“…The effect of oleyl amine on processing and physical properties of SBR compounds filled with silane–silica particles has been evaluated. Two different types of…”
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Effect of network heterogeneities on the physical properties of nitrile rubbers cured with dicumyl peroxide by GONZALEZ, L, RODRIGUEZ, A, MARCOS-FERNANDEZ, A, VALENTIN, J. L, FERNANDEZ-TORRES, A

“…The scope of this study is to continue our earlier studies on the peroxide curing of diene elastomers. The effect of peroxide content and temperature on the…”
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Vulcanization of polybutadiene rubber with dipentamethylene thiuram tetrasulfide by Posadas, P, Fernández, A, Brasero, J, Valentín, J.L, Marcos, A, Rodríguez, A, González, L

“…The cure of polybutadiene rubber (BR) with sulfur donor dipentamethylene thiuram tetrasulfide (DPTT) does not show reversion reaction, in contrast with similar…”
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