Reinforcement of dynamically vulcanized EPDM/PP elastomers using organoclay fillers

Tsai, Yuhsin; Wu, Jyh‐Horng; Wu, Yao-Tsu; Li, Chia-Hao; Leu, Ming-Tsong

doi:10.1088/1468-6996/9/4/045005

Cited by 9 publications

(8 citation statements)

References 43 publications

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“…The poor adhesion between the phases and the large particle size of the rubber phase facilitate the propagation of cracks and lead to a pronounced decline of the mechanical properties of the blends [13] . In order to improve the properties of blends containing recycled rubbers, some authors devulcanize the rubber phase [3,9,[14][15][16][17][18] , or add functional fillers [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] . Besides, it is well known that dynamic vulcanization notoriously increases the adhesion and interaction between the phases.…”

Section: Introductionmentioning

confidence: 99%

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

et al. 2015

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SbstractThe main objective of this work is to study the influence of clay addition on dynamically revulcanized blends of Ground Tire Rubber (GTR)/High Density Polyethylene (HDPE). GTR was previously devulcanized in a system comprised of a conventional microwave oven adapted with a motorized stirring, with a fixed microwave power and at various exposure times. The influence of clay addition on the final properties of the blends was evaluated in terms of mechanical, viscoelastic, thermal and rheological properties, with morphology being also analyzed. The results depict that the clay can modify the rheological behavior of the GTR phase, in addition to the thermal and mechanical properties of some blends.

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Section: Introductionmentioning

confidence: 99%

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

et al. 2015

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“…It has been emphasized that organoclay, consisting of low-molecular-weight organic compounds and inorganic silicate, has a plasticizing effect in low amounts added to the low-molecular-weight organic compounds in its structure. 72 In a previously mentioned study, Paran et al investigated the rheological properties of the TPV nanocomposites, and the rheological properties are shown in Figure 12. In Figure 12A, it was seen that the modulus values of all samples increased with increasing frequency.…”

Section: Rheological Propertiesmentioning

confidence: 99%

“…The obtained result is that the stress values increase, but the elongation at break values decreases with thermal aging. 72…”

Section: -30mentioning

confidence: 99%

“…Compared to pure TPV, TPVs filled with organoclay exhibited a greater number of dispersed lines, indicating that the organoclay serves as a nucleating agent within the system. 72 Feng Ma et al studied the effects of the dynamic vulcanization process on the morphological characteristics of blends of PP and EPDM loaded with carbon black (CB). Phenolic resin (PF) was used as a curing agent.…”

Section: Morphological Propertiesmentioning

confidence: 99%

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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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“…TPE based on ethylene-propylene diene terpolymer (EPDM)/polypropylene (PP) blend is proposed as alternative for medical applications. 4,5 PP and EPDM individually have proved the biocompatibility. However, although base materials are biocompatible, many final polymer compounds fail in in vivo sensitization due to incorporation of additives and contamination during processing, sterilization, and packaging stages.…”

Section: Introductionmentioning

confidence: 95%

E-beam sterilizable thermoplastics elastomers for healthcare devices: Mechanical, morphology, and in vivo studies

et al. 2018

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The effect of electron beam radiation on ethylene-propylene diene terpolymer/polypropylene blends is studied as an attempt to develop radiation sterilizable polypropylene/ethylene-propylene diene terpolymer blends suitable for medical devices. The polypropylene/ethylene-propylene diene terpolymer blends with mixing ratios of 80/20, 50/50, 20/80 were prepared in an internal mixer at 165°C and a rotor speed of 50 rpm/min followed by compression molding. The blends and the individual components were radiated using 3.0 MeV electron beam accelerator at doses ranging from 0 to 100 kGy in air and room temperature. All the samples were tested for tensile strength, elongation at break, hardness, impact strength, and morphological properties. After exposing to 25 and 100 kGy radiation doses, 50% PP blend was selected for in vivo studies. Results revealed that radiation-induced crosslinking is dominating in EPDM dominant blends, while radiation-induced degradation is prevailing in PP dominant blends. The 20% PP blend was found to be most compatible for 20-60 kGy radiation sterilization. The retention in impact strength with enhanced tensile strength of 20% PP blend at 20-60 kGy believed to be associated with increased compatibility between PP and EPDM along with the radiation-induced crosslinking. The scanning electron micrographs of the fracture surfaces of the PP/EPDM blends showed evidences consistent with the above contentation. The in vivo studies provide an instinct that the radiated blends are safe to be used for healthcare devices.

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Reinforcement of dynamically vulcanized EPDM/PP elastomers using organoclay fillers

Cited by 9 publications

References 43 publications

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

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

E-beam sterilizable thermoplastics elastomers for healthcare devices: Mechanical, morphology, and in vivo studies

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