Anont ChaisuriyathepkulKrisda SuchivaPongdhorn Sae-OuiChakrit SirisinhaMahidol UniversityThailand National Metal and Materials Technology Center2018-06-112018-06-112012-03-15Journal of Applied Polymer Science. Vol.123, No.6 (2012), 3688-369510974628002189952-s2.0-82955233805https://repository.li.mahidol.ac.th/handle/20.500.14594/13982An in-house developed co-rotating batch mixer was used to prepare the blends of natural rubber (NR) and ethylene-propylene-diene terpolymer (EPDM) in the present work. Phase morphology and magnitude of dispersive mixing efficiency offered by the in-house developed co-rotating batch mixer and a conventional counter-rotating batch mixer were compared. It has been found that the co-rotating batch mixer equipped with the MX2 rotor configuration could improve the dispersive mixing efficiency of NR/EPDM blends considerably. A poor state-of-mix in blends, particularly at high fill factor, could be overcome by the utilization of MX2 rotor configuration where the extensional flow is probably facilitated in the converging zones. © 2011 Wiley Periodicals, Inc.Mahidol UniversityChemistryMaterials ScienceArticleSCOPUS10.1002/app.35042