A comparison between the effects of gamma radiation and sulfur cure system on the microstructure and crosslink network of (styrene butadiene rubber/ethylene propylene diene monomer) blends in presence of nanoclay

Naseri, Aida Shoushtari Zadeh; Jalali‐Arani, Azam

doi:10.1016/j.radphyschem.2015.05.037

Cited by 31 publications

(6 citation statements)

References 36 publications

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“…where, ρ p = density of the rubber (g/cm 3 ), V r = volume fraction of rubber in the solvent-swollen lled compound, V s = molar volume of the penetrant, χ = interaction parameter of the rubber (0.3) [44], and…”

Section: Crosslinking Densitymentioning

confidence: 99%

Effect of Silica Nanoparticles and Modified Silica Nanoparticles on the Mechanical and Swelling Properties of EPDM/SBR Blend Nanocomposites

Ragupathy¹,

Prabaharan²,

Pragadish

et al. 2023

Silicon

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The in uences of nanosilica and modi ed nanosilica on cure, compression set, mechanical and swelling characteristics are studied in blends of ethylenepropylene-diene monomer (EPDM)/styrene-butadiene rubber (SBR). In EPDM/SBR composites, the nanosilica made from rice husk ash (RHA) was utilised as a reinforcing nano ller. The interaction between the nanosilica and the EPDM/SBR matrix at the interface is crucial for the production of rubber composites. This study uses bis [3-(triethoxysilyl)propyl] tetrasul de (TESPT) and polyoxyethylene (20) sorbitan monolaurate (TWEEN-20) as a silica modi er, with the ratio of TESPT to TWEEN-20 maintained at 2:1. The cure and mechanical characteristics, compression set, abrasion and swelling resistance increased with the incorporation of nanosilica and modi ed nanosilica. By interacting at the interface between silica nanoparticles and the EPDM/SBR rubber matrix, TESPT with the TWEEN-20 modi er exhibits a considerable effect on cure characteristics, mechanical qualities, and swelling resistance.

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Section: Crosslinking Densitymentioning

confidence: 99%

Effect of Silica Nanoparticles and Modified Silica Nanoparticles on the Mechanical and Swelling Properties of EPDM/SBR Blend Nanocomposites

Ragupathy¹,

Prabaharan²,

Pragadish

et al. 2023

Silicon

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“…Considering the polymer density denoted as ρ p , the molar volume of the solvent (V s = 106.3 mL/gmol), and the constant parameter for polymer interaction (χ = 0.3) [72], the volume fraction of solvent-swollen lled rubber compound, V r , can be calculated through the utilization of Eq. ( 5) as outlined in reference [73]:…”

Section: Crosslinking Densitymentioning

confidence: 99%

Effect of HNTs and modified HNTs nanotubes on the mechanical properties and swelling resistance of EPDM/SBR rubber blend nanocomposites

et al. 2023

Preprint

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The relationship between the structure and mechanical properties of intricate rubber nanocomposites holds the key to enhancing the performance of roofing membranes. This study involves the incorporation of halloysite nanotubes (HNTs) that have been modified with 3-Aminopropyltriethoxysilane (APTES) into blends of ethylene-propylene diene monomer (EPDM) and styrene butadiene rubber (SBR). These blends maintain consistent concentrations, with a composition of 80% EPDM and 20% SBR. This addition aims to assess changes in curing behavior, mechanical characteristics, microstructure, and swelling tendencies. The incorporation of APTES-modified HNTs leads to an increase in minimum torque, maximum torque, and delta torque during the curing process. However, both scorch time and optimal cure time decrease as HNTs content rises. Notably, systems containing 6 parts per hundred rubber (phr) of APTES-modified HNTs exhibit a remarkable 121% enhancement in tensile strength and a 59% increase in stress at 100% elongation. With the escalating concentration of HNTs within the EPDM/SBR nanocomposites, a multitude of alterations come into play. Tear strength, hardness, and resistance to abrasion experience improvements, while elongation at break, rebound resilience, and mole percent uptake undergo reduction. APTES-modified HNTs filler-filled EPDM/SBR nanocomposites exhibited superior performance compared to those filled with unmodified HNTs. The augmented hydrophobic nature of APTES-modified HNTs fosters enhanced particle dispersion, thereby fostering improved mechanical properties, as evidenced in FESEM.

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“…The polymer blends with a continuous morphology, where both components playing the role of radical source, such as SBR and EPDM, are the suitable hybrid materials for many products that demand a dense but elastic material showing a convenient oxidation strength. An appropriate example is the formulation consisting of SBR/EPDM = 50:50 and nanoclay particles crosslinked with sulfur or by γ-irradiation [136], where filler The evidence on the radiation effects on EPDM nanohybrids is provided by the ageing investigation achieved on the EPDM/silica composites [135]. The destructive effect of diene content (EBN at 0.5 phr) is annihilated by the contribution of nanoparticle silica loading, which reinforces the EPDM microstructure by the formation of multiple bridges between polymer macromolecules.…”

Section: Compound 7 133mentioning

confidence: 99%

Irradiation Effects in Polymer Composites for Their Conversion into Hybrids

Zaharescu

Mariș

2022

J. Compos. Sci.

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In this paper several aspects of profound modifications caused by high energy exposures are presented as possible candidates for the efficient adjusting processing of polymer materials. The class of hybrid composites receives special attention due to the large spectrum of formulations, where the interphase interaction decisively influences the material properties. They represent potential start points for the intimate uniformity of hybrid morphologies. Their radiation processing turns composites onto hybrid morphology with expected features, because the transferred energy is spent for the modification of components and for their compatibility. The essential changes achieved in radiation processed composites explain the new material behavior and durability based on the peculiar restructuring of polymer molecules that occurred in the polymer phase. During high energy irradiation, the interaction between intermediates born in the constitutive phases may convert the primary composites into hybrids, integrating them into large applicability spheres. During the radiation exposure, the resulting hybrids gain a continuous dispersion by means of new chemical bonds. This type of compounds achieves some specific structural modifications in the polymer phase, becoming stable hybrid composites. The functional properties of hybrids definitely influence the material behavior due to the molecular changes based on the structural reasons. The radiolysis of the vulnerable component becomes an appropriate opportunity for the creation of new material with improved stability. The radiation treatment is a proper conversion procedure by which common mixtures may become continuously reorganized. This review presents several examples for the radiation modifications induced by radiation exposure that allow the compatibilization and binding of components as well as the creation of new structures with improved properties. This approach provides the reference patterns for the extension of radiation processing over the well-conducted adjustments of polymer composites, when certain material features are compulsorily required. From this review, several solutions for the adjustment of regular polymer composites into hybrid systems may become conceivable by the extended radiation processing.

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A comparison between the effects of gamma radiation and sulfur cure system on the microstructure and crosslink network of (styrene butadiene rubber/ethylene propylene diene monomer) blends in presence of nanoclay

Cited by 31 publications

References 36 publications

Effect of Silica Nanoparticles and Modified Silica Nanoparticles on the Mechanical and Swelling Properties of EPDM/SBR Blend Nanocomposites

Effect of Silica Nanoparticles and Modified Silica Nanoparticles on the Mechanical and Swelling Properties of EPDM/SBR Blend Nanocomposites

Effect of HNTs and modified HNTs nanotubes on the mechanical properties and swelling resistance of EPDM/SBR rubber blend nanocomposites

Irradiation Effects in Polymer Composites for Their Conversion into Hybrids

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