Unsaturated polyester as compatibilizer for styrene–butadiene (SBR)/acrylonitrile–butadiene (NBR) rubber blends

Mansour, S. H.; Tawfik, S. Y.; Youssef, Moheb H.

doi:10.1002/app.10095

Cited by 23 publications

(15 citation statements)

References 12 publications

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“…7 The effect of unsaturated polyester (UPE) on the compatibility of SBR/NBR in their physical blends was studied with ultrasonic velocity and attenuation measurements. 8 The effect of some compatibilizers on the compatibility of SBR/NBR rubber blends has been studied. The investigated compatibilizers were a) a polymeric compatibilizer, namely, acrylonitrile-butadiene-styrene (ABS); b) low molecular weight compounds, such as divinylbenzene (DVB) and triethylene glycol dimethylacrylate (TEGDMA); and c) graft copolymers, such as SBR-g-AN, NBR-g-St, BR-g-AN, and BR-g-St.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate‐g‐butadiene rubber

Botros¹,

Moustafa²,

Ibrahim³

2005

J of Applied Polymer Sci

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Polyglycidylmethacrylate grafted butadiene rubber (PGMA-g-BR) was synthesized by a graft solution copolymerization technique. The PGMA content was determined through titration against HBr. The PGMA-g-BR was blended with styrene butadiene rubber/butadiene acrylonitrile rubber (SBR/NBR) blends with different blend ratios. The SBR/NBR (50/50) blend was selected to examine the compatibility of such blends. Compatibility was examined using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and viscosity measurements. The scanning electron micrographs illustrate the change of morphology of the SBR/NBR rubber blend as a result of the incorporation of PGMA-g-BR onto that blend. The T g s of SBR and NBR in the blend get closer upon incorporation of PGMA-g-BR 10 phr, which indicates improvement in blend homogeneity. The intrinsic viscosity () versus blend ratio graph shows a straight-line relationship, indicating some degree of compatibility. Thermal stability of the compatibilized and uncompatibilized rubber blend vulcanizates was investigated by determination of the physicomechanical properties before and after accelerated thermal aging. Of all the vulcanizates with different blend ratios under investigation, the SBR/NBR (25/75) compatibilized blend possessed the best thermal stability. However, the SBR/NBR (75/25) compatibilized blend possessed the best swelling performance in brake fluid. The effect of various combinations of inorganic fillers on the physicomechanical properties of that blend, before and after accelerated thermal aging, was studied in the presence and absence of PGMA-g-BR.

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Section: Introductionmentioning

confidence: 99%

Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate‐g‐butadiene rubber

Botros¹,

Moustafa²,

Ibrahim³

2005

J of Applied Polymer Sci

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“…SBR/NBR blend is considered as a compatible blend due to the fact that the styrene in SBR and the nitrile groups in NBR could form a donor-acceptor system which produces ease compatibility. Mansour et al [10] , have investigated the effect of unsaturated polyester as compatibilizer on SBR/NBR blends, while Ramesan et al found that Blends of SBR and NBR are to be immiscible and its compatibility can be achieved by using dichlorocarbene modified (DCSBR) as a compatibilizer. In addition, the effect of DCSBR on cure characteristics, swelling behaviour, mechanical properties, oil resistance and air ageing behaviour is also studied [11] .…”

Section: Introductionmentioning

confidence: 99%

Production three Neutralinos from electron-positron annihilation via H^0 and Z^0 propagators

Ahmed¹

2019

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Different blends of SBR/NBR compatibilized by butadiene rubber (BR) were prepared according to the well-known standard methods. The modified blends of unfilled SBR/NBR was characterized on the basis of the effect of blend ratio by curing parameters, mechanical characteristics, abrasion resistance, compression set and swelling properties. It was found that SBR/NBR blends showed comparatively better mechanical properties compared to each rubber individually. Curing parameters e.g. low torque (ML) and high one (MH) were increased, while a reduction in the curing and scorch times were decreased with increasing SBR ratio in the blend. Results revealed that, the increase of SBR content results in an enhancement of tensile strength (TS) and elongation at break (Eb). The effect of blend ratio showed a peak value for (TS) & (Eb) at 50SBR/50NBR. For that, two types of carbon blacks, N220 and N774 were incorporated with the optimum blend ratio (50SBR/50NBR) by different concentrations. The effect of carbon blacks on the mechanical characteristics, hardness, abrasion resistance, compression test and even the swelling test in benzene have been discussed according to the recent current theories.

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“…Synthetic and natural rubbers and elastomers in solid and liquid forms have been applied to improve UPE damping properties. Rubbers such as natural rubber latex (NRL) [16,18] and styrene-butadiene rubber (SBR) latex [19,20], and functional elastomers such as hydroxyl-terminated polybutadiene, deoxidized natural rubber, hydroxyl terminated natural rubber, and maleated nitrile rubber [15] have been used to enhance UPE damping properties. Also Polyoxypropylenetriamine (POPTA) has also been employed, combined with temperature during curing, to optimize the damping factor and mechanical properties of UPE [21].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Thermal and Mechanical Properties of Unsaturated Polyester Resin as a Binder in Polymer Concrete for Manufacturing Precision Tool Machine Bases

Haddad¹,

Sbarski²

2017

J Material Sci Eng

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This study investigates the effect of unsaturated polyester resin chemical composition on the coefficient of thermal expansion, damping properties, flexural strength, tensile strength and hardness. The resin is used as binder in polymer concrete for manufacturing the bases of precision tool machines in previous work published by the authors. Resins of various ratios of styrene-ARAPOL and methyl methacrylate (MMA)-ARAPOL were made and their curing kinetics was studied using viscosity measurements and exothermic reaction temperature profiles. The resins were studied using dynamic mechanical analysis and in-house thermal expansion measuring devices. It was found that ARAPOL-MMA (60:40) has the highest damping factor of 5.46%, and the thermal expansion coefficient of 7.98 × 10-5/°C. This composition also has the optimum flexural and tensile strengths at 128 MPa and 58.6 MPa.

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Unsaturated polyester as compatibilizer for styrene–butadiene (SBR)/acrylonitrile–butadiene (NBR) rubber blends

Cited by 23 publications

References 12 publications

Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate‐g‐butadiene rubber

Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate‐g‐butadiene rubber

Production three Neutralinos from electron-positron annihilation via H^0 and Z^0 propagators

Optimization of Thermal and Mechanical Properties of Unsaturated Polyester Resin as a Binder in Polymer Concrete for Manufacturing Precision Tool Machine Bases

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