Networked Silica with Exceptional Reinforcing Performance for SBR Compounds: Interconnected by Methylene Diphenyl Diisocyanate

Jeong, Dong Shin; Hong, Chang Kook; Lim, Gyun Taek; Seo, Gon; Ryu, Chang Seok

doi:10.1177/0095244309103662

Cited by 9 publications

(1 citation statement)

References 10 publications

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“…A considerable amount of research has been carried out on the surface modification of silica intended for a wide range of applications. Among them are the reinforcement of dry rubber and plastic materials (Ru et al, 2006;Peng et al, 2007;Jeong et al, 2009;Park et al, 2010). However, surface modified silica has not been successfully used for the reinforcement of NRL in large scale latex based product manufacture.…”

Section: December 2014mentioning

confidence: 99%

Surface modification of silica with a hydrophilic polymer and its influence on reinforcement of natural rubber latex

Somaratne¹,

Liyanage²,

Walpalage³

2014

J. Natn. Sci. Foundation Sri Lanka

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Surface modification of precipitated silica particles was carried out in both aqueous and non aqueous media separately with a polyacrylic based hydrophilic polymer synthesized in the laboratory. FTIR spectroscopy and thermo gravimetric analysis of the modified and unmodified silica particles were performed to confirm successful surface modification. Colloidal stability of the aqueous dispersions of the unmodified/modified silica particles were observed at different pH levels. The dispersions at neutral pH were incorporated in different proportions to un-compounded and compounded natural rubber latex (NRL) separately and thin latex films were produced from them by casting. Dispersability of silica particles within the rubber matrix was examined through microstructure studies of films cast from unmodified/modified silica incorporated un-compounded NRL. The influence of surface modification upon the reinforcement of NRL was investigated through tensile and tear strength properties of vulcanized NRL cast films containing modified silica. The uniform dispersion of silica particles and the improved mechanical properties envisaged better compatibility of modified silica particles with NRL by means of interfacial interactions. A significant improvement in the mechanical properties was observed in the films produced with 5-7 phr of modified silica.

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Section: December 2014mentioning

confidence: 99%

Surface modification of silica with a hydrophilic polymer and its influence on reinforcement of natural rubber latex

Somaratne¹,

Liyanage²,

Walpalage³

2014

J. Natn. Sci. Foundation Sri Lanka

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Grafting hydroxy‐terminated polybutadiene onto nanosilica surface for styrene butadiene rubber compounds

Pourhossaini

Razzaghi‐Kashani

2011

J of Applied Polymer Sci

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Hydroxy teminated polybutadiene (HTPB) was grafted onto the surface of nanosilica particles via toluene di-isocyanate (TDI) bridging to reduce filler-filler interactions and improve dispersion of nanosilica in rubber. Also, this prepolymer as modifier contains double bonds which participate in sulfur curing of styrene butadiene rubber (SBR) matrix to enhance filler/polymer interaction and reinforcement effects of silica. The reactions were characterized by titration and Fourier transforms infrared spectroscopy. Thermogravimetric analysis was utilized to evaluate the weight percentage of grafted TDI and HTPB. About 60% of the hydroxyl sites of silica were reacted with excess TDI in the first reaction. In the second reaction, HTPB as desired reactive coating was grafted on the functionalized nanosilica to constitute about 24 wt % of the final modified silica. The sedimentation experiments showed good suspension stability for the modified nanosilica in the organic media. Scanning electron microscopy revealed nanoscale dispersion of modified silica aggregates in the SBR matrix at concentration of about 14 phr. Also, vulcanization characteristics and mechanical properties of compounds demonstrated that HTPB grafting improved dispersion of nanosilica as well as its interaction to the rubber matrix as an efficient reinforcement.

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Reinforcement of styrene‐butadiene/polybutadiene rubber compounds by modified silicas with different surface and networked states

Ryu

Yang

Park

et al. 2017

J of Applied Polymer Sci

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In this study, the reinforcement performance of the modified silicas prepared through the incorporation of 3‐aminopropyltriethoxy silane (AP) and further reaction of bisphenol A diglycidyl ether (BG) to styrene‐butadiene/butadiene rubber (SBR/BR) compounds was investigated to discuss the effect of surface and networked states on the properties of silica‐filled rubber compounds. The adjustment of the ratio of BG to AP varied the surface and networked states of silica. The amino and glycidyl groups dispersed on the silica and the networks formed on/between silica particles considerably influenced the properties of SBR/BR compounds reinforced with the modified silicas. The presence of amino group increased viscosity of the rubber compounds due to the attrition between rubber chains and silica particles, while the entanglement of rubber chains with the networks successfully improve both wet traction and rolling resistance, without sacrificing the fundamental properties of the rubber compounds, even though no coupling agents were applied. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44893.

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Networked Silica with Exceptional Reinforcing Performance for SBR Compounds: Interconnected by Methylene Diphenyl Diisocyanate

Cited by 9 publications

References 10 publications

Surface modification of silica with a hydrophilic polymer and its influence on reinforcement of natural rubber latex

Surface modification of silica with a hydrophilic polymer and its influence on reinforcement of natural rubber latex

Grafting hydroxy‐terminated polybutadiene onto nanosilica surface for styrene butadiene rubber compounds

Reinforcement of styrene‐butadiene/polybutadiene rubber compounds by modified silicas with different surface and networked states

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