Synthesis of Ethylene‒Propylene Rubber Graft Copolymers by Borane Approach

Tze-chiang Chung, W. Janvikul, R. Bernard, G. J. Jiang

Research output: Contribution to journalArticlepeer-review

67 Scopus citations


This paper describes a new method to prepare graft copolymers which have an EP rubber backbone and several free radical polymerized polymers grafted thereto. The process involves hydroboration of commercial EPDM rubbers, such as poly(ethylene-co-propylene-co-1,4-hexadiene) and poly(ethylene-co-propylene-co-5-ethylidene-2-norbornene), with 9-borabicyclononane (9-BBN). The resulting secondary alkyl-9-BBN moieties in the EPDM copolymers were then exposed to oxygen in the presence of free radical polymerizable monomers. Under certain conditions, the selective autoxidation reaction of secondary alkyl-9-BBN took place to create desirable polymeric radicals which can in situ initiate free radical polymerization. High graft efficiency was observed with controllable copolymer compositions. The graft copolymer of EP-g-PMMA is used to show the chemistry as well as some of the physical properties.

Original languageEnglish (US)
Pages (from-to)26-31
Number of pages6
Issue number1
StatePublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry


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