New Coagents in Peroxide Vulcanization of EPM

Dikland, H. G.; Ruardy, T.; Does, L. van der; Bantjes, A.

doi:10.5254/1.3538338

Cited by 44 publications

(52 citation statements)

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“…They are used as reactive additives to boost the vulcanization efficiency (Endstra, 1990). The most used coagents are molecules with maleimide groups, (meth)acrylate groups, or allylic groups, (Dikland et al, 1993) but polymeric materials with a high vinyl content, i.e. 1,2-polybutadiene, can also act as coagents.…”

Section: Polyfunctional Monomers (Co-agents)mentioning

confidence: 99%

Aspects Regarding Radiation Crosslinking of Elastomers

Mănăilă¹,

Stelescu²,

Crăciun³

2012

Advanced Elastomers - Technology, Properties and Applications

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Section: Polyfunctional Monomers (Co-agents)mentioning

confidence: 99%

Aspects Regarding Radiation Crosslinking of Elastomers

Mănăilă¹,

Stelescu²,

Crăciun³

2012

Advanced Elastomers - Technology, Properties and Applications

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“…Co-agenþii sunt molecule organice multi-funcþionale extrem de reactive faþã de radicalii liberi [9]. Ei sunt folosiþi ca aditivi reactivi pentru a creºte eficienþa de vulcanizare [10][11][12].…”

Section: Introductionunclassified

“…Co-agents are multi-functional organic molecules which are highly reactive towards free radicals [9]. They are used as reactive additives to boost the vulcanization efficiency [10][11][12].…”

mentioning

confidence: 99%

The Crosslink Density of Ethylene-Vinyl-Acetate Copolymer/Triallylcyanurate Mixture Cross-linked by Electron Processing

Stelescu¹,

Mănăilă²,

Crăciun³

et al. 2014

LFJ

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ABSTRACT. Vulcanization by electron beam (EB) irradiation involves the interaction of electron energy and an elastomer. The interaction results in formation of free radicals by dissociation of molecules in the excited state or by interaction of molecular ions. The free radicals or molecular ions can react by connecting directly to the polymer chains or by initiating grafting reactions. The chemistry of the process is based on macroradical formation from elastomer chains, which recombine causing structuring. This paper presents the effect of ionizing radiation on mixtures based on ethylene-vinyl acetate copolymer (EVA) and triallylcyanurate (TAC). Samples were subjected to electron beam treatment with doses ranging between 50 kGy and 500 kGy. The induced crosslinking of EVA/TAC samples was evaluated with gel fraction (crosslinked polymer content) and crosslink density determination. The cross-linking density of the samples was determined on the basis of equilibrium solvent-swelling measurements (in toluene at 23-25°C) by applying the well-known modified Flory-Rehner equation for tetra functional networks, where values of the solubility parameter were calculated according to Small, Hoy and Krevelen. Sol-gel analyses and crosslink density have shown that samples tend to cross-link as a result of electron beam irradiation. As EB dose increases, there is an increase of gel fraction, of volume fractions of polymer in the samples at equilibrium swelling (í2m) and of cross-link density (í), and a decrease of swelling ratio G (toluene soluble polymer quantity). The highest value of crosslinking rate was obtained for the sample irradiated with a dose of 350 kGy. KEY WORDS: ethylene-vinyl-acetate-copolymer, triallylcyanurate, cross-linking, electron beam DENSITATEA DE RETICULARE A UNOR AMESTECURI COPOLIMER ETILEN-VINIL-ACETAT/TRIALILCIANURAT RETICULATE PRIN PROCESAREA CU ELECTRONIACCELERAÞI REZUMAT. Vulcanizarea prin iradiere cu electroni acceleraþi (EA) se bazeazã pe interacþiunea dintre energia electronilor ºi elastomerul supus acestui tratament. În urma acestei interacþiuni se obþin radicali liberi formaþi prin disocierea moleculelor aflate în stare excitatã sau prin interacþiunea ionilor moleculari. Radicalii liberi sau ionii moleculari pot reacþiona prin legarea directã de lanþul polimeric sau prin iniþierea reacþiilor de grefare. Chimia procesului se bazeazã pe formarea de macroradicali pe lanþul elastomeric, care se recombinã determinând structura finalã. În aceastã lucrare este prezentat efectul radiaþiei ionizante asupra unor amestecuri pe bazã de copolimer etilen-vinil-acetat (EVA) ºi trialilcianurat (TAC). Probele au fost supuse tratamentului cu electroni acceleraþi cu doze cuprinse între 50 kGy ºi 500 kGy. Reticularea prin iradiere a probelor EVA/TAC a fost evaluatã prin determinarea fracþiei de gel ºi a densitãþii de reticulare. Densitatea de reticulare a probelor a fost determinatã pe baza mãsurãtorilor gradului de gonflare în solvent (toluen) la 23-25°C, prin aplicarea bine cunoscutei ecuaþii modificate Flor...

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“…Aceºtia sunt folosiþi ca aditivi reactivi pentru a creºte eficienþa vulcanizãrii [16]. Cei mai utilizaþi co-agenþi sunt moleculele cu grupãri maleimide, (met)acrilate sau alilice [17], dar ºi materialele polimerice cu un conþinut ridicat de vinil, adicã 1,2-polibutadienã, pot acþiona drept co-agenþi.…”

Section: Introductionunclassified

“…They are used as reactive additives to boost the vulcanization efficiency [16]. The most used co-agents are molecules with maleimide groups, (meth)acrylate groups, or allylic groups [17], but polymeric materials with a high vinyl content, i.e. 1,2-polybutadiene, can also act as co-agents.…”

mentioning

confidence: 99%

The Mechanical Properties of Ethylene-Vinyl-Acetate Copolymer/Triallylcyanurate Mixture Cross-linked by Electron Beam and Microwave Processing

Crăciun¹,

Ighigeanu²

2013

LFJ

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ABSTRACT. In this study, the effect of the polyfunctional monomer triallylcyanurate on the mechanical properties of the ethylene-vinyl acetate copolymer crosslinked by electron beam and microwave processing was investigated. The control samples were obtained by cross-linking with dibenzoyl peroxide. The results show an improvement of mechanical properties for samples cross-linked by irradiation. KEYWORDS: ethylene-vinyl-acetate-copolymer, triallylcyanurate, cross-linking, irradiation. PROPRIETÃÞILE MECANICE ALE AMESTECULUI DE COPOLIMER ETILEN VINIL ACETAT / TRIALIL CIANURAT RETICULAT CU FASCICUL DE ELECTRONI ªIMICROUNDE REZUMAT. În acest studiu a fost investigat efectul monomerului polifuncþional trialil cianurat asupra proprietãþilor mecanice ale copolimerului etilen vinil acetat reticulat cu fascicul de electroni ºi microunde. Probele martor au fost obþinute prin reticulare cu peroxid de benzoil. Rezultatele aratã o îmbunãtãþire a proprietãþilor mecanice ale probelor reticulate prin iradiere. CUVINTE CHEIE: copolimer etilen vinil acetat, trialil cianurat, reticulare, iradiere. LES PROPRIÉTÉS MÉCANIQUES DU MÉLANGE COPOLYMÈRE ÉTHYLÈNE-ACÉTATE DE VINYLE / TRIALLYL CYANURATE RÉTICULÉ AU FAISCEAU D'ÉLECTRONS ETMICRO-ONDES RÉSUMÉ. Dans cette étude on a examiné l'effet du monomère polyfonctionnel triallyl cyanurate sur les propriétés mécaniques de l'éthylène-acétate de vinyle réticulé par faisceau d'électrons et micro-ondes. Les échantillons témoins ont été obtenus par réticulation au peroxyde de benzoyle. Les résultats montrent une amélioration des propriétés mécaniques des échantillons réticulés par irradiation.

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New Coagents in Peroxide Vulcanization of EPM

Cited by 44 publications

References 0 publications

Aspects Regarding Radiation Crosslinking of Elastomers

Aspects Regarding Radiation Crosslinking of Elastomers

The Crosslink Density of Ethylene-Vinyl-Acetate Copolymer/Triallylcyanurate Mixture Cross-linked by Electron Processing

The Mechanical Properties of Ethylene-Vinyl-Acetate Copolymer/Triallylcyanurate Mixture Cross-linked by Electron Beam and Microwave Processing

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