Radiation degradation of blends polypropylene/poly(ethylene-co-vinyl acetate)

Przybytniak, G.; Mirkowski, K.; Rafalski, A.; Nowicki, Andrzej; Kornacka, Ewa

doi:10.1016/j.radphyschem.2007.02.022

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…16 Marcilla et al 17 reported the similar DSC curve for EVA. The same phenomenon was reported by Przybytniak et al 18 for PP/EVA.…”

Section: Differential Scanning Calorimetrysupporting

confidence: 88%

“…Such observation is attributed to the occurrence of irradiation-induced cross-linking in EVA in the presence of TMPTA which has introduced irregularities in ordered phase. 18 TMPTA is a highly reactive trifunctional monomer that renders higher degree of cross-linking as compared to TPGDA, which is a difunctional monomer. The presence of TMPTA favors more radiation-induced cross-linking over degradation or chain scissioning.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

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Irradiation cross-linking of ethylene vinyl acetate/waste tire dust

Ratnam

Ramarad

Khalid

et al. 2014

Journal of Thermoplastic Composite Materials

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In an attempt to maximize the beneficial effect of irradiation, the influence of multifunctional acrylates (MFAs) such as trimethylol propane triacrylate, ethylene glycol dimethacrylate, trimethylol propane trimethacrylate, and tripropylene glycol diacrylate on the 90/10 ethylene vinyl acetate/waste tire dust (EVA/WTD) were studied. The 90/10 EVA/WTD and EVA-containing 4 phr MFA prepared using a Haake mixer at 140 C and 50 r min À1 rotor speed. The blends were then irradiated using a 3.0-MeV electron beam machine. Results on gel fraction revealed that EVA/WTD blends were cross-linked by electron beam irradiation. Among the MFA employed in this studies, TPGDA was found to render highest tensile strength with the best retention in elongation at break and increased heat of fusion and crystallinity of blends upon irradiation. The changes in the properties of EVA/WTD blends upon irradiation are attributed to the cross-linking of the EVA matrix. The changes in crystallinity and crystalline melting temperatures of EVA/WTD blends upon irradiation are discussed in detail.

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“…16 Marcilla et al 17 reported the similar DSC curve for EVA. The same phenomenon was reported by Przybytniak et al 18 for PP/EVA.…”

Section: Differential Scanning Calorimetrysupporting

confidence: 88%

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Irradiation cross-linking of ethylene vinyl acetate/waste tire dust

Ratnam

Ramarad

Khalid

et al. 2014

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

show abstract

“…The intensity of the secondary peak (subsidiary peak) increased with the absorbed dose but with little variation in its position. This is expected due to the defective molecular segments due to the presence of chemical irregularities, which were formed by the oxidative degradation process in the main chain of the corresponding polymers 35…”

Section: Resultsmentioning

confidence: 99%

Electron‐Induced Reactive Processing of Poly(propylene)/Ethylene–Octene Copolymer Blends: A Novel Route to Prepare Thermoplastic Vulcanizates

Rajeshbabu

Gohs

Naskar

et al. 2011

Macro Materials & Eng

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TPVs are prepared by dynamic vulcanization in which crosslinking of an elastomeric polymer takes place during its melt mixing with a thermoplastic polymer under high‐shear conditions. 30:70 wt% blends of PP and ethylene–octene copolymer are vulcanized using electron‐induced reactive processing (EIReP) employing a range of absorbed doses (25, 50, and 100 kGy) while keeping the electron energy and treatment time fixed. The structure/property relationships of the prepared samples are studied using various characterization techniques such as DMA, DSC, SEM, and melt rheology. The results suggest that EIReP offers a novel route to prepare TPVs without any chemical crosslinking and coupling agents.

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“…3). Grazýna Przybytniak et al concluded that the oxidation of alkyl radicals in PP= EVA blends proceeds slower than in PP [17] .…”

Section: Results and Discussion Chemical Analysismentioning

confidence: 99%

Formation of Vinylidene in Polypropylene/Ethylene Vinyl Acetate (PP/EVA) Blends During Degradation

Alothman

Salahudeen

Elleithy

et al. 2012

Polymer-Plastics Technology and Engineering

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The effect of natural exposure and artificial weathering on selected properties of PP/EVA blends was investigated. The vinyl acetate concentration decreased with exposure time due to acetylation. The most pronounced effect of radiation is associated with oxidative degradation. The cross-linking of PP/EVA blends was attributed to the formation of vinylidene group. Weathering decreased the tensile strength, elongation at break, and Young's modulus of the naturally and artificially exposed blends. This reduction was the result of blends' molecular weight reduction due to the degradation induced by weathering.

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Radiation degradation of blends polypropylene/poly(ethylene-co-vinyl acetate)

Cited by 8 publications

References 13 publications

Irradiation cross-linking of ethylene vinyl acetate/waste tire dust

Irradiation cross-linking of ethylene vinyl acetate/waste tire dust

Electron‐Induced Reactive Processing of Poly(propylene)/Ethylene–Octene Copolymer Blends: A Novel Route to Prepare Thermoplastic Vulcanizates

Formation of Vinylidene in Polypropylene/Ethylene Vinyl Acetate (PP/EVA) Blends During Degradation

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