Influence of Layered Silicate on the Self‐Crosslinking of Polychloroprene and Carboxylated Nitrile Rubber

Das, Amit; Stöckelhuber, Klaus Werner; Heinrich, Gert

doi:10.1002/macp.200800427

Cited by 22 publications

(16 citation statements)

References 22 publications

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“…Interaction between the chlorine atom of CR and surface hydroxyl group of silica leads to formation of strong rubber-ller network and restricts the movement of rubber chains. [32][33][34] The maximum increase in storage modulus is observed for composite 6 which was prepared by the integration of silane during silica generation for this composite. Furthermore, the reduction in peak height for both NR and CR phases, in the tan d versus temperature plot, indicates the reinforcement effect of ller in rubber matrix ( Fig.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 92%

Controlled growth of in situ silica in a NR/CR blend by a solution sol–gel method and the studies of its composite properties

et al. 2015

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Silica is grown in situ into a natural rubber (NR)/chloroprene rubber (CR) blend (at 40/60 ratio), by a solution sol-gel method, where the silica content in rubber blend is increased in a controlled manner exceeding the limit found for the same blend ratio in the soaking sol-gel method. Reaction conditions have been optimized to get adequate conversion of tetraethoxysilane (TEOS, a silica precursor) to silica. Rheological, thermal, mechanical and viscoelastic properties of all the composites are compared with those of the unfilled rubber blend at similar conditions. Thermal and mechanical properties of the composites are found to improve consistently as silica content in the composite increases owing to increased rubber-filler interaction as revealed in dynamical mechanical analysis (DMA). Further improvement in the properties is observed for a particular composite where a silane coupling agent ((g-aminopropyl)trimethoxysilane, g-APS) is used in the reactive sol-gel system during in situ generation of silica. This is attributed to the uniform distribution of silica in the rubber matrix and strong rubber-filler interaction, caused by bifunctionality of silane, as revealed by morphology and DMA studies respectively. The reinforcement effect of silica is evaluated by comparing the experimental results with theoretical values obtained from the Guth-Gold model and the modified Guth model. The present study supplements the in situ silica generation in NR/CR blend of 40/60 ratio, following the solution sol-gel method, to the earlier study involving the soaking sol-gel method where the maximum reinforcement was found for this composition.

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Section: Dynamic Mechanical Analysismentioning

confidence: 92%

Controlled growth of in situ silica in a NR/CR blend by a solution sol–gel method and the studies of its composite properties

et al. 2015

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“…It is also interesting to look into the chemical interactions of organoclay (QUATmodified MMT) with functionally polar rubbers like XNBR, CR, and their mutual blend. The role of layered silicate on the curing process of CR/XNBR blends was investigated through the study of curing kinetics, mechanical properties, WAXS, and DMA [108]. Figure 29 shows the tan δ dependencies on temperature for the pure CR and XNBR, crosslinked with sulfur and containing 10 phr organoclay.…”

Section: Effect Of Layered Fillers In Non-linear Viscoelasticity Of Bmentioning

confidence: 99%

Non-linear Viscoelastic Behaviour of Rubber-Rubber Blend Composites and Nanocomposites: Effect of Spherical, Layered and Tubular Fillers

Nair

George

Joseph

2014

Advances in Polymer Science

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This chapter deals with the non-linear viscoelastic behaviour of rubberrubber blend composites and nanocomposites with fillers of different particle size. The dynamic viscoelastic behaviour of the composites has been discussed with reference to the filler geometry, distribution, size and loading. The filler characteristics such as particle size, geometry, specific surface area and the surface structural features are found to be the key parameters influencing the Payne effect. Non-linear decrease of storage modulus with increasing strain has been observed for the unfilled vulcanizates. The addition of spherical or near-spherical filler particles always increase the level of both the linear and the non-linear viscoelastic properties. However, the addition of high-aspect-ratio, fiber-like fillers increase the elasticity as well as the viscosity.

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“…This interfacial reaction leads to stronger interfacial interactions with FKM rubber matrix. As a result, the ATH highly influences the molecular dynamics and cross-linking density of the FKM matrix, thereby increasing the storage modulus and reducing the Tg of the composites [26]. Usually, due to the strong interfacial interactions between the rubber matrix and filler surface, the glass transition temperature (Tg) is shifted to higher temperature.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

Effect of Aluminium Hydroxide on Thermal, Dynamic Mechanical and Dielectric Properties of Hexafluoropropylene-vinylidinefluoride Elastomeric Composites

Nair¹,

Vijayan²,

Ayswarya³

et al. 2017

JAN

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Abstract. Aluminium hydroxide (ATH) particles were incorporated at different loadings into fluorocarbon rubber (FKM), to study the effect of filler loading on the cure characteristics, mechanical properties, dynamic mechanical properties and thermal stability. The mechanical properties of FKM/ATH composites were better than medium thermal black filled vulcanizates. The storage modulus (E') of the composites was found to increase due to the enhancement in stiffness. The viscoelastic properties revealed that there is a strong interaction between the polymer and the filler. The dielectric permittivity, AC conductivity and absorption coefficient of the highly ATH loaded systems are much greater than the unfilled and lower systems.

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Influence of Layered Silicate on the Self‐Crosslinking of Polychloroprene and Carboxylated Nitrile Rubber

Cited by 22 publications

References 22 publications

Controlled growth of in situ silica in a NR/CR blend by a solution sol–gel method and the studies of its composite properties

Controlled growth of in situ silica in a NR/CR blend by a solution sol–gel method and the studies of its composite properties

Non-linear Viscoelastic Behaviour of Rubber-Rubber Blend Composites and Nanocomposites: Effect of Spherical, Layered and Tubular Fillers

Effect of Aluminium Hydroxide on Thermal, Dynamic Mechanical and Dielectric Properties of Hexafluoropropylene-vinylidinefluoride Elastomeric Composites

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