Effects of blend composition and dynamic vulcanization on the morphology and dynamic viscoelastic properties of PP/EPDM blends

Prut, E. V.; Erina, N.A.; Karger‐Kocsis, J.; Medintseva, T. I.

doi:10.1002/app.28158

Cited by 62 publications

(60 citation statements)

References 15 publications

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“…Being G' proportional to the stored energy [36] , this value is proportional to the elasticity or, in other words, to the cross-linking density of the elastomeric phase of the blend. G' is influenced also by morphology of the blends [28,37] .…”

Section: According To Thementioning

confidence: 99%

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Blends of ground tire rubber devulcanized by microwaves/HDPE - Part A: influence of devulcanization process

et al. 2015

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SbstractThe main objective of this work is the study of the influence of microwaves devulcanization of the elastomeric phase on dynamically revulcanized blends based on Ground Tire Rubber (GTR)/High Density Polyethylene (HDPE). The devulcanization of the GTR was performed in a system comprised of a conventional microwave oven adapted with a motorized stirring at a constant microwaves power and at various exposure times. The influence of the devulcanization process on the final properties of the blends was evaluated in terms of mechanical, viscoelastic, thermal and rheological properties. The morphology was also studied.

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Section: According To Thementioning

confidence: 99%

“…The tensile According to Prut et al [36] , Young's modulus depends on the crystallinity development during the quenching. With the increase of the crystallinity, the matrix became tougher, which led to the increase of the Young's modulus.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part A: influence of devulcanization process

et al. 2015

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“…G' values could be influenced by cross-linking density [52] and/or blend morphology [42,43] , being that the morphology refinement and compatibility between the phases tend to increase the G' values. According to SEM micrographs, no conclusion about the morphology refinement of the blends can be made, but the mechanical properties results depict the poor adhesion between the phases, being that a possible particle detachment from the matrix occurs when applied an external stress.…”

Section: Oscillatory Rheometrymentioning

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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“…Several authors [24][25][26][27] surveyed the morphology and rheology of various kinds of polyolefin blends with special reference to the varying blend ratios. Figure 2 shows the SEM photomicrographs of 50/50 blend ratio of PP/EOC and PP/EPDM uncrosslinked and dynamically crosslinked blends.…”

Section: Morphologymentioning

confidence: 99%

Interrelationships of morphology, thermal and mechanical properties in uncrosslinked and dynamically crosslinked PP/EOC and PP/EPDM blends

Babu¹,

Singha²,

Naskar³

2010

Express Polym. Lett.

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Abstract. Thermoplastic vulcanizates (TPVs) based on polypropylene (PP) with ethylene octene copolymer (EOC) and ethylene propylene diene rubber (EPDM) have been developed by coagent assisted dicumyl peroxide crosslinking system. The study was pursued to explore the influence of two dissimilar polyolefin polymers (EOC and EPDM) having different molecular architectures on the state and mode of dispersion of the blend components and their effects with special reference to morphological, thermal and mechanical characteristics. The effects of dynamic crosslinking of the PP/EOC and PP/EPDM have been compared by varying the concentration of crosslinking agent and ratio of blend components. The results suggested that the uncrosslinked and dynamically crosslinked blends of PP/EOC exhibit superior mechanical properties over PP/EPDM blends. From the hystersis experiments it was found that PP/EOC blends also perform better fatigue properties over PP/EPDM based blends. It was demonstrated that, the origin of the improved mechanical properties of EOC based blends is due to the combined effect of the unique molecular architecture with the presence of smaller crystals and better interfacial interaction of EOC phase with PP as supported by the results of thermal and fatigue analyses.

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Effects of blend composition and dynamic vulcanization on the morphology and dynamic viscoelastic properties of PP/EPDM blends

Cited by 62 publications

References 15 publications

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part A: influence of devulcanization process

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part A: influence of devulcanization process

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

Interrelationships of morphology, thermal and mechanical properties in uncrosslinked and dynamically crosslinked PP/EOC and PP/EPDM blends

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