Di-azides cross-linked, iPP/EPDM-based thermoplastic vulcanizates

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• 作者：A.J.  ; Zieli¨½ska^a ;   ; ^c ; J.W.M.  ; Noordermeer^a ;   ; ^c ;   ; ^{J.W.M.Noordermeer@utwente.nl} ; A.G.  ; Talma^a ;   ; ^c ; M.  ; van Duin^b ;   ; ^c
• 关键词：TPV ; EPDM ; Di-azide ; Cross-linking
• 刊名：European Polymer Journal
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：47
• 期：12
• 页码：2311-2320
• 全文大小：1359 K

文摘

Two di-azidoformates: 4,4?isopropylidenediphenyl azidoformate (4,4¡äDAF), and tri(ethylene glycol)-di(azidoformate) (GDAF), and one di-sulfonyl azide: 1,3-benzenedisulfonyl azide (1,3BDSA), are investigated as cross-linking agents for iPP/EPDM-based dynamically vulcanized thermoplastic vulcanizates (TPVs). Their performance is compared with TPVs cured with peroxide, alone and in combination with a coagent. The di-azides proved already to be effective curing agents for EPDM-rubber in static conditions in a previous study. With respect to the production conditions of the investigated TPVs, the reaction temperature of the sulfonyl azide makes it the most suitable cross-linking agent. Exceptionally good mechanical properties are obtained with very low 1,3BDSA loadings. The results indicate that, in the 1,3BDSA cross-linked TPVs the EPDM-rubber particles size significantly change with the curative concentration.