Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Characteristics with Casting Molding of Functional EPDM Through Grafting Polymerization

  • Yoon, Yoo Mi (Korea Institute of Footwear & Leather Technology) ;
  • Kim, Donghyun (Dept. of Polymer Engineering, Pukyong National University) ;
  • Kim, Jeong Hoe (Dept. of Polymer Engineering, Pukyong National University) ;
  • Kim, Minseub (Dept. of Polymer Engineering, Pukyong National University) ;
  • Lee, Won Ki (Dept. of Polymer Engineering, Pukyong National University) ;
  • Park, Chan Young (Dept. of Polymer Engineering, Pukyong National University)
  • Received : 2017.09.04
  • Accepted : 2017.09.18
  • Published : 2017.09.30
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Abstract

After the grafting of methacrylic acid (MA) to ethylene propylene diene monomer (EPDM), a new peak at $1704cm^{-1}$ corresponding to the carboxylic acid group was observed in the infrared (IR) spectrum. This characteristic MA molecule peak grew larger as the MA contents were increased. After casting films were prepared from pure EPDM and MA-grafted EPDM, differential scanning calorimeter (DSC) measurements were made the pure EPDM exhibited a melting point of approximately $45^{\circ}C$ while that of the MA-grafted EPDM was $135{\sim}140^{\circ}C$. As the graft ratio of MA increased, the absorbed heat capacity increased at temperatures near $135{\sim}140^{\circ}C$, indicating that an increased amount of MA reacted. Furthermore, owing to the addition of crystalline MA, it is expected that strength of the elastomer will improve as the graft ratio increases, as a result of the increased number of hard segments.

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