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Title: Synthesis of ethylene-propylene rubber graft copolymers by borane approach

Abstract

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 copolymer 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.

Authors:
; ; ;  [1]
  1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
Publication Date:
OSTI Identifier:
5436963
Resource Type:
Journal Article
Journal Name:
Macromolecules; (United States)
Additional Journal Information:
Journal Volume: 27:1; Journal ID: ISSN 0024-9297
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; BORANES; CHEMICAL REACTIONS; GRAFT POLYMERS; PHYSICAL PROPERTIES; SYNTHESIS; RUBBERS; SYNTHETIC MATERIALS; BORON COMPOUNDS; ELASTOMERS; HYDRIDES; HYDROGEN COMPOUNDS; MATERIALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; POLYMERS; 400201* - Chemical & Physicochemical Properties; 360606 - Other Materials- Physical Properties- (1992-)

Citation Formats

Chung, T C, Janvikul, W, Bernard, R, and Jiang, G J. Synthesis of ethylene-propylene rubber graft copolymers by borane approach. United States: N. p., 1994. Web. doi:10.1021/ma00079a004.
Chung, T C, Janvikul, W, Bernard, R, & Jiang, G J. Synthesis of ethylene-propylene rubber graft copolymers by borane approach. United States. https://doi.org/10.1021/ma00079a004
Chung, T C, Janvikul, W, Bernard, R, and Jiang, G J. 1994. "Synthesis of ethylene-propylene rubber graft copolymers by borane approach". United States. https://doi.org/10.1021/ma00079a004.
@article{osti_5436963,
title = {Synthesis of ethylene-propylene rubber graft copolymers by borane approach},
author = {Chung, T C and Janvikul, W and Bernard, R and Jiang, G J},
abstractNote = {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 copolymer 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.},
doi = {10.1021/ma00079a004},
url = {https://www.osti.gov/biblio/5436963}, journal = {Macromolecules; (United States)},
issn = {0024-9297},
number = ,
volume = 27:1,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}