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Control of the damping properties of magnetorheological elastomers by using polycaprolactone as a temperature - controlling component / Xinglong Gong in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6395-6403 Titre : Control of the damping properties of magnetorheological elastomers by using polycaprolactone as a temperature - controlling component Type de document : texte imprimé Auteurs : Xinglong Gong, Auteur ; Yanceng Fan, Auteur ; Shouhu Xuan, Auteur Année de publication : 2012 Article en page(s) : pp. 6395-6403 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Magnetorheological  Elastomers Résumé : A novel kind of magnetorheological elastomers (MREs) with controllable damping properties was developed in this study. Polycaprolactone (PCL) was selected as the temperature-controllable component in the cis-polybutadiene rubber (BR) based MREs. Several samples with different BR/PCL mass ratio matrixes were prepared. The dynamic performances of the samples, including loss factor, shear storage modulus, and loss modulus, were measured with a rheometer. Differential scanning calorimetry (DSC) analysis indicated that PCL is a phase change material and it can transform from a semicrystalline solid to a liquated soft material by increasing the surrounding temperature above the PCL melting point. Experimental results showed that the damping properties of the MREs can be controlled by varying the PCL weight ratio, the temperature, and the magnetic field. The controlling mechanism was proposed and the influence factors were analyzed. Last, it was also observed that the magneto-induced modulus and the MR effect of the MREs were changed remarkably by the added PCL under different temperatures. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300317b [article] Control of the damping properties of magnetorheological elastomers by using polycaprolactone as a temperature - controlling component [texte imprimé] / Xinglong Gong, Auteur ; Yanceng Fan, Auteur ; Shouhu Xuan, Auteur . - 2012 . - pp. 6395-6403. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6395-6403 Mots-clés : Magnetorheological  Elastomers Résumé : A novel kind of magnetorheological elastomers (MREs) with controllable damping properties was developed in this study. Polycaprolactone (PCL) was selected as the temperature-controllable component in the cis-polybutadiene rubber (BR) based MREs. Several samples with different BR/PCL mass ratio matrixes were prepared. The dynamic performances of the samples, including loss factor, shear storage modulus, and loss modulus, were measured with a rheometer. Differential scanning calorimetry (DSC) analysis indicated that PCL is a phase change material and it can transform from a semicrystalline solid to a liquated soft material by increasing the surrounding temperature above the PCL melting point. Experimental results showed that the damping properties of the MREs can be controlled by varying the PCL weight ratio, the temperature, and the magnetic field. The controlling mechanism was proposed and the influence factors were analyzed. Last, it was also observed that the magneto-induced modulus and the MR effect of the MREs were changed remarkably by the added PCL under different temperatures. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300317b

Temperature-dependent mechanical properties and model of magnetorheological elastomers / Wei Zhang in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6704–6712 Titre : Temperature-dependent mechanical properties and model of magnetorheological elastomers Type de document : texte imprimé Auteurs : Wei Zhang, Auteur ; Xinglong Gong, Auteur ; Shouhu Xuan, Auteur Année de publication : 2011 Article en page(s) : pp 6704–6712 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Magnetorheological  elastomers  Mechanical  properties Résumé : Magnetorheological elastomers (MREs) are composed of magnetizable particles (iron particles) and a soft rubberlike matrix. Their mechanical properties, including modulus and damping capability, depend on both an external magnetic field and an environmental temperature. To systematically investigate thetemperature-dependent mechanical properties, six different kinds of MREs samples based on a mixed rubber matrices (cis-polybutadiene rubber and natural rubber) and their mass ratios of BR and NR were 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100, were fabricated in this study. The steady-state and dynamic mechanical properties of the samples were measured under different conditions by using a rheometer. The results revealed that storage modulus (G′) and loss modulus (G′′) of samples, which contained only cis-polybutadiene rubber (BR), decreased linearly with the temperature increment. However, the modulus of sample which contained much natural rubber (NR) showed different characteristic, and the relationships between stress and strain also exhibited different characteristics with different rubber matrix. An improved constitutive equation was developed to model these properties under different magnetic fields and temperatures. The comparison between modeling predicting results with experimental data demonstrated that the model can well-predict the modulus of MRE in different conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200386x [article] Temperature-dependent mechanical properties and model of magnetorheological elastomers [texte imprimé] / Wei Zhang, Auteur ; Xinglong Gong, Auteur ; Shouhu Xuan, Auteur . - 2011 . - pp 6704–6712. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6704–6712 Mots-clés : Magnetorheological  elastomers  Mechanical  properties Résumé : Magnetorheological elastomers (MREs) are composed of magnetizable particles (iron particles) and a soft rubberlike matrix. Their mechanical properties, including modulus and damping capability, depend on both an external magnetic field and an environmental temperature. To systematically investigate thetemperature-dependent mechanical properties, six different kinds of MREs samples based on a mixed rubber matrices (cis-polybutadiene rubber and natural rubber) and their mass ratios of BR and NR were 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100, were fabricated in this study. The steady-state and dynamic mechanical properties of the samples were measured under different conditions by using a rheometer. The results revealed that storage modulus (G′) and loss modulus (G′′) of samples, which contained only cis-polybutadiene rubber (BR), decreased linearly with the temperature increment. However, the modulus of sample which contained much natural rubber (NR) showed different characteristic, and the relationships between stress and strain also exhibited different characteristics with different rubber matrix. An improved constitutive equation was developed to model these properties under different magnetic fields and temperatures. The comparison between modeling predicting results with experimental data demonstrated that the model can well-predict the modulus of MRE in different conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200386x