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7729915 
Journal Article 
Melt grafting of maleic anhydride onto an ethylene - propylene-diene terpolymer (EPDM) 
Grigoryeva, OP; Karger-Kocsis, J 
2000 
Yes 
European Polymer Journal
ISSN: 0014-3057 
Elsevier Science Ltd 
Exeter 
36 
7 
1419-1429 
English 
WOS:000086701800014 
Peroxide-initiated melt grafting of maleic anhydride (MAH) onto an ethylene-propylene-diene terpolymer (EPDM) of high ethylene content (= 74 wt%) has been studied using a Brabender Plasticoder. The grafting efficiency and crosslinking degree (gel content) of the grafted EPDM rubber (EPDM-g-MAH) were determined by FTIR spectroscopy and xylene extraction, respectively. It was established that both grafting and crosslinking reactions are mostly influenced by the dosage of the MAH and peroxide (2,5-dimethyl-2,5-di-(t-butylperoxy)hexane), respectively. The targeted relative high MAH grafting at low gel content was reached at low concentrations of both MAH (< 5 wt%) and peroxide (< 0.2 wt%). Processing variables, as mixing temperature and time, rotor speed and filling grade of the mixing chamber, showed only a marginal effect on the competing grafting and crosslinking reactions. 
ethylene-propylene-diene terpolymer (EPDM); melt functionalization; maleic anhydride grafting; grafting efficiency; grafting conditions