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Revisit of Thermoplastic EPDM/PP Dynamic Vulcanizates

  • Lim, Jaehwa (BK21 PLUS Center for Advanced Chemical Technology, Department Polymer Science and Engineering, Pusan National University) ;
  • Park, Jun Il (Yooil Rubber Company, Materials Division) ;
  • Park, Joon Chul (Hyundai Motor Group, Research and Development Division) ;
  • Jo, Mi Young (Hyundai Motor Group, Research and Development Division) ;
  • Bae, Jae Yeong (BK21 PLUS Center for Advanced Chemical Technology, Department Polymer Science and Engineering, Pusan National University) ;
  • Choi, Seok Jin (Hyundai NGV, 314 dong, Seoul National University) ;
  • Kim, Il (BK21 PLUS Center for Advanced Chemical Technology, Department Polymer Science and Engineering, Pusan National University)
  • Received : 2017.02.21
  • Accepted : 2017.03.09
  • Published : 2017.03.31

Abstract

A comprehensive survey of the available literature showed that in the last few decades, there has been a growing interest in the use of thermoplastic vulcanizates (TPVs). TPVs are the second largest group of soft thermoplastic elastomers (TPEs) after styrene-based block copolymers, and offer a wide range of potential and proven applications, including in mechanical rubber goods, under-the-hood applications in the automotive field, industrial hose applications, electrical applications, consumer goods, and soft touch applications. Over the last two decades, TPVs have shown a strong and steady market growth (~12% per year). Commercialized TPVs are commonly based on blends of ethylene propylene diene monomer (EPDM) rubber and polypropylene (PP), and to a lesser extent on combinations of butyl or nitrile rubber with PP. EPDM/PP TPVs are characterized by finely dispersed crosslinked EPDM rubber particles (particles size varying between 0.5 and $2.0{\mu}m$) distributed in a continuous thermoplastic PP matrix. If the rubber particles of such a blend are small enough and if they are vulcanized well enough, then the properties of the blend are generally improved. This review article introduces various topics and aspects relevant to EPDM/PP TPVs. The development of TPVs, the use of various types of crosslinking systems and co-agents as crosslinking agents for PP/EPDM blends, the morphology and rheology of TPVs, and their typical end-use applications are also reviewed.

Acknowledgement

Supported by : 현대자동차그룹, 유일고무(주)

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