________________________________________ * Author for correspondence; E-mail: vadivelche@gmail.com; +91 94422 58686; Fax: +91 443330 3334 Int. J. Chem. Sci.: 13(2), 2015, 737-746 ISSN 0972-768X www.sadgurupublications.com THERMAL AND MORPHOLOGY STUDIES OF SILICONIZED EPOXIDIZED ETHYLENE-PROPYLENE-DIENE TERPOLYMER M. VADIVEL a , M. SURESH CHANDRA KUMAR * , J. DHAVEETHU RAJA a , M. SANKAR GANESH a and S. ARVIND NARAYAN b Polymer Nanocomposite Centre, Department of Chemistry & Research Centre, Scott Chrisitian College, NAGERCOIL – 629 003 (T.N.) INDIA a Department of Chemistry, Mohamed Sathak Engineering College, KILAKARAI – 623 806, Dist.: Ramanathapuram (T.N.) INDIA b Faculty of Science and Humanities K. N. S. K. College of Engineering, Therekalputhoor, NAGERCOIL – 629901, Dist.: Kanyakumari (T.N.) INDIA ABSTRACT Siliconized epoxidized ethylene-propylene-diene terpolymer was developed by ethylene- propylene-diene terpolymer (EPDM) was epoxidized with an in situ formed per formic acd to prepare epoxidized EPDM (eEPDM) with hydroxyl terminated polydimethysiloxane (silicone) modifier using 3-aminopropyltriethoxysilane (APTES) crosslinker and dibutyltindilaurate (DBTDL) as catalyst. The chemical structure of Siliconized epoxidized ethylene-propylene-diene terpolymer was confirmed by FT-IR spectroscopy. The thermal properties and morpholiges of the EPDM, eEPDM and Siliconized epoxidized ethylene-propylene-diene terpolymer were investigated. Siliconized epoxidized ethylene- propylene-diene terpolymer is observed that the improves their thermal stability due to the partial ionic nature, high bond energy and thermal stability of –Si-O-Si- linkage. Siliconized epoxidized ethylene- propylene-diene terpolymer systems show heterogeneous morphology. Key words: eEPDM, Dibutyltindilaurate, Thermal properties, Morphology. INTRODUCTION It has been reported that ethylene-propylene-diene terpolymer (EPDM) has superior resistances to light, heat, ozone and oxygen because it has little contents of the nonconjugated diene component 1-4 . Epoxidation is the easy and efficient method for