Synthesis of ethylene-propylene rubber graft copolymers by borane approach

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Macromolecules; (United States)

DOI:https://doi.org/10.1021/ma00079a004· OSTI ID:5436963

Chung, T C; Janvikul, W; Bernard, R; Jiang, G J ^[1]

---

1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering

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.

• OSTI ID: 5436963
• Journal Information: Macromolecules; (United States), Journal Name: Macromolecules; (United States) Vol. 27:1; ISSN MAMOBX; ISSN 0024-9297
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
BORANES
BORON COMPOUNDS
CHEMICAL REACTIONS
ELASTOMERS
GRAFT POLYMERS
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYMERS
RUBBERS
SYNTHESIS
SYNTHETIC MATERIALS