Functionalized Emulsion Styrene-Butadiene Rubber Containing Diethylaminoethyl Methacrylate for Silica Filled Compounds

Abstract

In this study, diethylaminoethyl methacrylate-styrene-butadiene terpolymer (DEAEMA-SBR), in which diethylaminoethyl methacrylate (DEAEMA) was introduced to the SBR molecule as a third monomer, was synthesized by cold emulsion polymerization. It is expected that amine group introduced to a rubber molecule would improve dispersion of silica by the formation of hydrogen bond (or ionic coupling) between the amine group and silanol groups of silica surface. The chemical structure of DEAEMA-SBR was analyzed using proton nuclear magnetic resonance spectroscopy (H-NMR), Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC) and differential scanning calorimetry (DSC). Then, various properties of DEAEMA-SBR/silica composite such as crosslink density, bound rubber content, abrasion resistance, and mechanical properties were evaluated. As a result, bound rubber content and crosslink density of DEAEMA-SBR/silica compound were higher than those of the SBR 1721 composite. Abrasion resistance and moduli at 300% elongation of the DEAEMA-SBR/silica composite were better than those of SBR 1721 composite due to the high bound rubber content and crosslink density. These results are attributed to high affinity between DEAEMA-SBR and silica. The proposed study suggests that DEAEMA-SBR can help to improve mechanical properties and abrasion resistance of the tire tread part.

The Investigation of the Silica-Reinforced Rubber Polymers with the Methoxy Type Silane Coupling Agents

“…The measured torque value was used to determine the maximum torque (T max ), minimum torque (T min ), and optimum cure time (t 90 ) in Table 4 . The vulcanization of the rubber specimen was conducted in a hot process over an optimum cure time (t 90 + 2 min) [ 22 ]. The result comparison between the samples showed that the methoxy-type SCAs rather than the ethoxy-type SCAs were more favorable towards processability (e.g., Mooney viscosity) and cure rate.…”

Preparation and Performance of Silica/ESBR Nanocomposites Modified by Bio-Based Dibutyl Itaconate

“…Among them, copolymerization modification is an important means for imparting special functions to rubber in emulsion polymerization. The copolymerization modification of ESBR refers to copolymerizing a third functional monomer, such as glycidyl methacrylate (GMA) [28], hydroxypropyl methacrylate (HPMA) [29], acrylonitrile (ACN) [29], or methyl diethylaminoethyl acrylate [30], during the process of ESBR synthesis. The effects of various functional monomers in silica/ESBR compounds have been investigated, and results show that hydroxylated methacrylates and acrylates are suitable third co-monomers in ESBR for improving interfacial interaction in the compounds.…”

The Effect of Surface Area of Silicas on Their Reinforcing Performance to Styrene-butadiene Rubber Compounds

“…Samples for the swelling tests were square-type sheets 2 cm in length and 2 mm in thickness. 20 The samples were immersed into toluene (99.5%, Duksan) at room temperature and the increase was measured in mass at given time intervals. The swelling ratio (Q) was calculated by Q = (W r /ρ r + W s /ρ s )/(W r /ρ r ), where W r and W s were the weights of rubber before and after the swelling treatment, respectively, and ρ r and ρ s were the densities of the rubber and the solvent, respectively.…”