Preparation and characterization of EPDM rubber modified with <i>in situ</i> generated silica

Morselli, Davide; Bondioli, Federica; Luyt, A. S.; Mokhothu, T. H.; Messori, Massimo

doi:10.1002/app.38566

Cited by 26 publications

(30 citation statements)

References 18 publications

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“…The second volatilization step around 400–470°C is related to the main degradation of the EPDM rubber. Figure also shows that, except for the increase in the amount of residue at 600°C with increasing silica content, the presence of silica nanoparticles in the vulcanized rubber had little influence on the thermal stability of EPDM, which was also observed and likewise explained by Morselli et al . Therefore, the longer reaction times did not have a significant influence on the thermal stability.…”

Section: Resultssupporting

confidence: 78%

“…Similar observations and explanations were reported in the investigation of IR/SiO 2 composites generated through in situ synthesis by Messori et al . This group also investigated EPDM rubber reinforced with in situ ‐ generated silica , but in their case much shorter reaction times were used. Their storage modulus values also increased with increasing silica content, but they were significantly lower than the ones listed in Table .…”

Section: Resultssupporting

confidence: 77%

“…In this study, we investigated the preparation and characterization of EPDM filled with in situ‐generated silica nanoparticles. Our approach is similar to the investigations of Messori et al on the in situ generation of silica from TEOS into isoprene and EPDM rubbers with in situ‐generated silica. In this investigation, the reaction time of preparation was increased in order to improve the mechanical, thermomechanical, and thermal properties of the EPDM matrix.…”

Section: Introductionmentioning

confidence: 74%

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Influence of in situ -generated silica nanoparticles on EPDM morphology, thermal, thermomechanical, and mechanical properties

et al. 2014

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Silica nanoparticles were synthesized by means of a sol–gel method and generated in ethylene propylene diene monomer rubber (EPDM) by in situ synthesis. The properties were determined using scanning electron microscopy, attenuated total reflectance Fourier‐transform infrared spectroscopy, thermogravimetric analysis, tensile testing, dynamic mechanical analysis, swelling tests, and gel content determination. The silica particles were homogenously dispersed in the EPDM matrix, with the presence of agglomerates, especially for high silica contents. The swelling experiments showed a decrease in the crosslinking density of the vulcanized rubber due to the presence of the silica nanoparticles. The mechanical properties, however, were significantly improved by the presence of the stiff silica nanoparticles. The effect of the amount of silica on the thermomechanical properties and thermal degradation of EPDM was also investigated. The presence of silica showed an increase in the storage and loss moduli at high temperatures, probably due to the increasing filler content. The thermal degradation analysis showed that the presence of silica particles incorporated in the EPDM matrix had no significant influence on the thermal stability of the composites. POLYM. COMPOS., 36:825–833, 2015. © 2014 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 78%

Section: Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 74%

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Influence of in situ -generated silica nanoparticles on EPDM morphology, thermal, thermomechanical, and mechanical properties

et al. 2014

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“…Several reports are available in the literature on the in situ generation of silica in the different rubber matrices such as natural rubber (NR), isoprene rubber (IR), styrene butadiene rubber (SBR), polydimethylsiloxane (PDMS), ethylene propylene diene monomer rubber (EPDM), butadiene rubber (BR), acrylic rubber (ACM), and chloroprene rubber (CR) . However, research on nitrile rubber (NBR) filled with in situ silica is very limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of silane integrated sol–gel derived in situ silica on the properties of nitrile rubber

Kapgate

Das

Basu

et al. 2014

J of Applied Polymer Sci

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Nitrile rubber/silica composites are prepared by a sol-gel process using tetraethoxysilane as precursor in the presence of cmercaptopropyltrimethoxysilane as a silane coupling agent. Here, we follow a novel processing route where the silica particles are generated inside the rubber matrix before compounding with vulcanizing ingredients. The effect of in situ generated silanized silica on the properties of the rubber composite has been evaluated by studying curing characteristics, morphology, mechanical and dynamic mechanical properties. Enhanced rubber-filler interaction of these composites is revealed from stress-strain studies and dynamic mechanical analysis. Excessive use of silane shows an adverse effect on mechanical properties of the composites. Due to finer dispersed state of the in situ silica and enhanced rubber-filler interaction, the mechanical properties and thermal stability of the composites are improved compared to corresponding ex situ processed composite.

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“…There are two methods to introduce the in situ formed silica in the EPDM rubber. In the first method, the in situ silica/EPDM nanocomposites can be prepared by dissolving EPDM in the organic solvents following the addition of a silica precursor, such as tetraethoxysilane (TEOS), with or without the presence of coupling agents . However, this route is not environmentally friendly and a solvent elimination process is required to obtain the pure in situ silica‐reinforced rubber.…”

Section: Introductionmentioning

confidence: 99%

Comparative behavior of in situ silica generation in saturated rubbers: EPDM and hydrogenated natural rubber

Ongwongsakul

Rempel

Poompradub

et al. 2017

J of Applied Polymer Sci

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Role of carbon‐carbon double (CC) bonds content and their position in ethylene‐propylene diene ter‐polymer (EPDM), hydrogenated natural rubber (HNR) and natural rubber (NR) on in situ silica formation using tetraethoxysilane (TEOS) as a silica precursor is comparatively investigated. Glass transition temperature (Tg) reflecting rubber chain flexibility is found as an important factor for in situ silica generation via swelling method. Despite of similar solubility parameters, NR has higher TEOS‐swelling degree resulting in the higher in situ silica content (30.8 phr) than EPDM (3.50 phr) and HNR (10.4–17.6 phr) due to the higher Tg of EPDM and HNR providing the less chain flexibility to be swollen in TEOS solution. The morphological analysis implies that CC bonds in saturated rubbers may be agglomeration sites for in situ silica particles. For practical applications, saturated rubbers containing in situ silica/NR vulcanizates showed the improvement of mechanical properties and resistance of thermal and ozone degradation. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44748.

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Preparation and characterization of EPDM rubber modified with in situ generated silica

Cited by 26 publications

References 18 publications

Influence of in situ -generated silica nanoparticles on EPDM morphology, thermal, thermomechanical, and mechanical properties

Influence of in situ -generated silica nanoparticles on EPDM morphology, thermal, thermomechanical, and mechanical properties

Effect of silane integrated sol–gel derived in situ silica on the properties of nitrile rubber

Comparative behavior of in situ silica generation in saturated rubbers: EPDM and hydrogenated natural rubber

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