End Functionalization of Styrene–Butadiene Rubber with Poly(ethylene glycol)–poly(dimethylsiloxane) Terminator

Kim, Eunkyoung; Lee, Eunha; Park, Insun; Chang, Taihyun

doi:10.1295/polymj.34.674

Cited by 13 publications

(9 citation statements)

References 21 publications

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“…To improve the performance of silica/rubber nanocomposites and lower the VOCs emission, as opposed to modifying the silica surface, the compatibility of silica and rubber can also be improved by the functionalization of the rubber molecular chain, e.g., introducing functional groups like carboxyl groups [ 24 , 25 ], hydroxyl groups [ 26 , 27 , 28 , 29 , 30 ], alkoxysilane groups, and epoxy groups [ 3 , 20 , 28 ] onto rubber chains during post-polymerization process. Additionally, these functional groups, especially alkoxysilane groups [ 31 , 32 , 33 , 34 ], can be introduced to the polymer chain during the polymerization process, copolymerization, or termination. These groups provide the rubber with polarity or more reactivity with silicon hydroxyl on silica surface.…”

Section: Introductionmentioning

confidence: 99%

Using Epoxidized Solution Polymerized Styrene-Butadiene Rubbers (ESSBRs) as Coupling Agents to Modify Silica without Volatile Organic Compounds

et al. 2020

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Rubber used in tire is usually strengthened by nanofiller, and the most popular nanofiller for tire tread rubber is nano silica, which can not only strengthen rubber but also lower the tire rolling resistance to reduce fuel consumption. However, silica particles are difficult to disperse in the rubber matrix because of the abundant silicon hydroxyl on their surface. Silane coupling agents are always used to modify silica and improve their dispersion, but a large number of volatile organic compounds (VOCs) are emitted during the manufacturing of the nanosilica/rubber composites because of the condensation reaction between silane coupling agents and silicon hydroxyl on the surface of silica. Those VOCs will do great harm to the environment and the workers’ health. In this work, epoxidized solution polymerized styrene-butadiene rubbers (ESSBR) with different epoxy degrees were prepared and used as macromolecular coupling agents aimed at fully eliminating VOCs. Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) analyses verified that the different ESSBRs were successfully synthesized from solution polymerized styrene-butadiene rubbers (SSBR). With the help of the reaction between epoxy groups and silicon hydroxyl without any VOC emission, nanosilica can be well dispersed in the rubber matrix when SSBR partially replaced by ESSBR which was proved by Payne effect and TEM analysis. Dynamic and static mechanical testing demonstrated that silica/ESSBR/SSBR/BR nanocomposites have better performance and no VOC emission compared with Bis-(γ-triethoxysilylpropyl)-disulfide (TESPD) modified silica/rubber nanocomposites. ESSBR is very hopeful to replace traditional coupling agent TESPD to get high properties silica/rubber nanocomposites with no VOCs emission.

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Section: Introductionmentioning

confidence: 99%

Using Epoxidized Solution Polymerized Styrene-Butadiene Rubbers (ESSBRs) as Coupling Agents to Modify Silica without Volatile Organic Compounds

et al. 2020

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“…Toughness of the materials, evaluated by integrating area under the stress-strain curve was in the range 19⋅41-23⋅28 J/m 3 . In comparison with the reported SBS-based blends, these values initially seemed to be pretty high (Kim et al 2001). Figure 4 illustrates SEM images of new blends prepared.…”

Section: Tensile Strengthmentioning

confidence: 79%

Design, synthesis and physical properties of poly(styrene-butadiene-styrene)/poly(thiourea-azo-sulfone) blends

Kausar

2014

Bull Mater Sci

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A new aromatic azo-polymer, poly(thiourea-azo-sulfone), has been synthesized using 1-(4thiocarbamoylaminophenylsulfonylphenyl)thiourea and diazonium salt solution. Conducting and thermally stable rubbery blends of poly(styrene-block-butadiene-block-styrene) (SBS) triblock copolymer and poly(thiourea-azo-sulfone) (PTAS) were produced by solution blending technique. PTAS possessed fine solubility in polar solvents and high molar mass 63 × 10 3 g moL −1. Microscopic analysis on SBS/PTAS blends revealed good adhesion between the two polymers without macro phase separation. Electrical conductivity measurement recommended that blending of SBS with 60% PTAS was sufficiently conducting 1⋅43 S cm-1. A relationship between PTAS loading and thermal stability of blends was observed. With the increasing PTAS content, 10% gravimetric loss was increased from 481 to 497 °C, while glass transition improved from 123 to 136 °C (better than neat SBS but lower than PTAS). The blends also established higher tensile strength (52⋅40-59⋅96 MPa) relative to SBS. Fine balance of properties renders new SBS/PTAS, potential engineering plastics for a number of aerospace relevance.

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“…This morphology composed of dispersed nanopores was accountable for fine conductivity in new blends as compared with previous SBS/PANI. 21 To gain better insight into the blend morphology, a thin film of SBS/PAT 10 was prepared for optical microscopic study. Figure 5 shows that the blend exhibited a typical two-phase morphology composed of round drops of diameter of several micrometers.…”

Section: Morphological Aspectmentioning

confidence: 99%

Physical properties of solution cast poly(styrene–butadiene–styrene)/heteroaromatic poly(azo-thiourea) blends

Kausar

Hussain

2013

Journal of Plastic Film & Sheeting

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The heteroaromatic azo-polymer poly(azo-thiourea) has been prepared using 4-(4-aminobenzyl)benzenamine and diazonium salt solution of 2,6-diaminopyridine. The polymer was processable using polar organic solvents and had high molar mass of 62 Â 10 3 gmol À1 . Various concentrations of azo-filler were blended in solution phase using tetrahydrofuran or dimethylformamide with poly(styrenebutadiene-styrene). Morphology, thermal, and mechanical properties of styrene-butadiene-styrene/poly(azo-thiourea)blends have been studied using fieldemission scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, and tensile tests. Field-emission scanning electron microscopy micrographs of styrene-butadiene-styrene/poly(azo-thiourea) blends revealed fine granular filler dispersion in the matrix and development of conducting pathways. Accordingly, filler content from 10 to 60 wt% increased the conductivity from 0.99 Â 10 À1 to 1.61 S cm À1 . A relationship between poly(azothiourea) loading and thermal stability of the materials was evident. Temperature for 10 wt% thermogravimetric weight loss increased from 467 C to 483 C, while glass transition was enhanced from 151 C to 155 C. Thermal and conductivity properties showed better results relative to pristine elastomer but less significant than the conducting filler used. Tensile properties were also dependent on the solvent used. In the dimethylformamide cast system, elongation at break Downloaded from was 345-387% versus the tetrahydrofuran system at 33-38%. The dimethylformamide cast blends tensile modulus was 599-769 MPa versus 876-1032 MPa for the tetrahydrofuran system. Thermal and conductivity behaviors were the same for both hybrid systems. Stress-induced birefringence in these blends has also been studied to find out the suitability of materials for waveguide applications.

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End Functionalization of Styrene–Butadiene Rubber with Poly(ethylene glycol)–poly(dimethylsiloxane) Terminator

Cited by 13 publications

References 21 publications

Using Epoxidized Solution Polymerized Styrene-Butadiene Rubbers (ESSBRs) as Coupling Agents to Modify Silica without Volatile Organic Compounds

Using Epoxidized Solution Polymerized Styrene-Butadiene Rubbers (ESSBRs) as Coupling Agents to Modify Silica without Volatile Organic Compounds

Design, synthesis and physical properties of poly(styrene-butadiene-styrene)/poly(thiourea-azo-sulfone) blends

Physical properties of solution cast poly(styrene–butadiene–styrene)/heteroaromatic poly(azo-thiourea) blends

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