Development of novel polar thermoplastic vulcanizates based on ethylene acrylic elastomer and polyamide 12 with special reference to heat and oil aging

Ismail, Syed Mohammed Reffai Syed; Chatterjee, Tuhin; Naskar, Kinsuk

doi:10.1002/app.42655

Cited by 16 publications

(9 citation statements)

References 22 publications

(21 reference statements)

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“…The PDMS network obtained by the various peroxides was characterized by measuring the equilibrium swelling in toluene using the well‐known Flory–Rehner Eq. .

ν = - \frac{1}{V_{s}} \times \frac{normall normaln true(1 - V_{r} true) + V_{r} + {χ V}_{normalr}^{2}}{{{true(V}_{normalr})}^{1 / 3} - 0.5 V_{r}}

where ν is the number of moles of effectively elastic chains per unit volume of PDMS (mol ml −1 ) (crosslink density); V s the molar volume of solvent (toluene) (ml mol −1 ), which is 105.74 ml mol −1 , χ the polymer‐swelling agent interaction parameter, taken as 0.45 for both PDMS and toluene at 20°C , and V r the volume fraction of rubber in the swollen network and V r can be expressed by Eq .…”

Section: Methodsmentioning

confidence: 99%

Exploring a novel cyclic monofunctional peroxide for curing of silicone rubber at elevated temperature

Chatterjee

Wießner

Naskar

et al. 2016

Polymer Engineering & Sci

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The curing characteristics of silicone rubber (polydimethylsiloxane [PDMS]) in the presence of structurally different peroxides, namely dicumyl peroxide (DCP) and 3,3,5,7,7-pentamethyl-1,2,4-trioxepane (PMTO), have been studied in details. At moderate temperature, DCP is more prominent for curing the silicone rubber but at high temperatures it suffers from low scorch safety. An inhibitor 2,2,6,6tetramethylpiperidinyloxyl (TEMPO) was added with DCP to stabilize the radicals in order to increase the scorch safety time. On the other hand, PMTO showed a prolonged scorch safety and better crosslinking efficiency rather than (DCP 1 TEMPO) mix at higher temperatures. PMTOcrosslinked PDMS shows better crosslinking efficiency as indicated by a higher gel content and low swelling index value. Also the mechanical properties, thermal stability, and dynamic mechanical behavior of PMTO-crosslinked PDMS are much superior than (DCP 1 TEMPO)-crosslinked PDMS. Apart from thermoplastic vulcanizates (TPVs) made from PMTO-crosslinked PDMS show better physicomechanical behavior compared to the TPVs made from (DCP 1 TEMPO)crosslinked PDMS. Moreover, DCP undergoes decomposition reactions at a higher temperature and forms acetophenone, which leads to an unpleasant smell in the final products whereas no such phenomenon is observed for PMTO. Therefore, PMTO turns out to be the suitable peroxide for crosslinking of PDMS at higher temperature. POLYM. FIG. 11. Storage modulus (E 0 ) of (DCP 1 TEMPO)-and PMTOcrosslinked PDMS. FIG. 12. Temile stress versus strain diagram.

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“…The PDMS network obtained by the various peroxides was characterized by measuring the equilibrium swelling in toluene using the well‐known Flory–Rehner Eq. .

ν = - \frac{1}{V_{s}} \times \frac{normall normaln true(1 - V_{r} true) + V_{r} + {χ V}_{normalr}^{2}}{{{true(V}_{normalr})}^{1 / 3} - 0.5 V_{r}}

Section: Methodsmentioning

confidence: 99%

Exploring a novel cyclic monofunctional peroxide for curing of silicone rubber at elevated temperature

Chatterjee

Wießner

Naskar

et al. 2016

Polymer Engineering & Sci

Self Cite

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“…A larger PA12 fraction (plastic phase) or a higher degree of cross-linking in the AEM rubber phase may cause an improvement in mechanical properties from V 70 P 30 PE 4 TPV to V 50 P 50 PE 4 TPV. 43 In a different study, Yao et al prepared BIIR/PA12 TPVs using dynamic vulcanization (DV), and the microstructure as well as the characteristics of BIIR/PA12 TPV were examined in the framework of recyclable inner liners for green tires to minimize the use of fuel and emissions of carbon. Samples were first to melt blended and then vulcanized with different vulcanization degrees.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

A comprehensive review of the recent developments in thermoplastics and rubber blends‐based composites and nanocomposites

Urtekin,

Ullah,

Yildirim

et al. 2023

Polymer Composites

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Various blends and composites have been prepared during the past decade to address limitations, including the poor mechanical properties of polymers, or to balance out the high cost of synthetic polymers. Rubber‐based thermoplastic blends and composites are being developed to attain improved performance and balanced qualities for usage in a variety of industries, including automotive, packaging, home products, space technology, and biomedical. Thermoplastics can be produced via standard manufacturing procedures and have outstanding qualities like low density, good chemical resistance, and heat resistance. However, rubbers are being used because of their elastic attributes, including their resilience, impact resistance, and good tear strength. These two materials work well together when blended or combined. In this article, an effort was made to narrow the gap between rubbers and thermoplastics. The mechanical, rheological, and morphological properties of the rubber/thermoplastic blends and composites/nanocomposites containing various types of conventional fillers and nanofillers were discussed comprehensively. Blends of these materials can provide too easier melt processing as well as financial benefits. The flexible nature and damping properties of rubber and better thermal stability and thermoplastic processability contributed to the development of high‐performance rubber/thermoplastic composites with better ductility, impact strength, and stiffness. Rubber reduced the high brittleness of thermoplastics because of its resilience and damping properties. In contrast, the poor processability and weak chemical resistance of rubbers were overcome via better processability and higher stiffness of thermoplastics. Rubber‐based thermoplastic composites and nanocomposites have been reported to offer greater flexibility, better processing, high impact strength, and chemical resistance.Highlights The properties of rubber/thermoplastic blends were discussed in this article. More recent advancements in rubber/thermoplastic blends were evaluated. Morphological properties depend on the rubber/thermoplastic blend ratio. The addition of reinforcements affects the rheological properties. Dispersion of additives and blend ratio influence the mechanical properties.

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“…To overcome this shortcoming, oil-resistant TPVs, based on polydimethylsiloxane/ polyamide 12, polyacrylate elastomer/polyamide, ethylene acrylic elastomer/polyamide 12 and ethylene-vinyl acetate rubber/poly (vinylidene fluoride), have been prepared. [14][15][16][17] For the automotive industry, good oil resistance of the material is only one factor; another more important requirement is long-term stability at high temperature. This is a new challenge for TPVs.…”

Section: Introductionmentioning

confidence: 99%

Low‐fuel‐permeation thermoplastic vulcanizates prepared from mutually miscible fluoroelastomer and poly(vinylidene fluoride–hexafluoropropylene)

Jin

et al. 2023

Polymer International

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An oleophobic barrier material is imperative for automotive fuel hose applications to reduce permeation of air-polluting hydrocarbons. With the increasingly strict exhaust emission regulations, the development of new fluoroelastomer (FKM) materials with enhanced fuel permeation resistance is highly desirable. Herein, we successfully developed a class of all-fluorinated thermoplastic vulcanizates (TPVs) by dynamic vulcanization from FKM and poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)). The mechanical properties, recyclability and fuel resistance of the FKM/P(VDF-HFP) TPVs were examined. The results show that the FKM/P(VDF-HFP) blends present high mechanical performance with tensile strength up to 26.3 MPa and strain at break of more than 600% at a high rubber/plastic ratio of 7:3 by weight. Moreover, our FKM/P(VDF-HFP) TPVs show excellent fuel resistance and recyclability. Such high mechanical properties, recyclability and fuel resistance are correlated with the good miscibility between FKM and P(VDF-HFP), the strong FKM rubber network and the fine phase morphology of TPVs. This work provides a guidance for the preparation of new TPVs through selecting mutually miscible polymers without any compatibilizer, and demonstrates that these new TPVs can be a good alternative option to replace the traditional thermosetting fluororubbers in the automotive industry as barrier layers for fuel hoses.

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Development of novel polar thermoplastic vulcanizates based on ethylene acrylic elastomer and polyamide 12 with special reference to heat and oil aging

Cited by 16 publications

References 22 publications

Exploring a novel cyclic monofunctional peroxide for curing of silicone rubber at elevated temperature

Exploring a novel cyclic monofunctional peroxide for curing of silicone rubber at elevated temperature

A comprehensive review of the recent developments in thermoplastics and rubber blends‐based composites and nanocomposites

Low‐fuel‐permeation thermoplastic vulcanizates prepared from mutually miscible fluoroelastomer and poly(vinylidene fluoride–hexafluoropropylene)

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