A novel compatibilizer for the toughening of unsaturated polyester resins

A block-copolymer of the type A–B–A was synthesized from a commercial polybutadiene rubber (PBD) and an unsaturated polyester (UP) prepolymer. The reaction process was monitored via Fourier transform–infrared spectroscopy. The obtained copolymer was used as compatibilizing agent for UP/PBD blends. F...

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Bibliographic Details
Published in:Journal of materials science 1999-03, Vol.34 (5), p.1037-1044
Main Authors: RAGOSTA, G, BOMBACE, M, MARTUSCELLI, E, MUSTO, P, RUSSO, P, SCARINZI, G
Format: Article
Language:English
Subjects:
Applied sciences
Block copolymers
Chemical industry
Chemical modifications
Chemical reactions and properties
Compatibility
Compatibilizers
Exact sciences and technology
Fourier transforms
Fracture surfaces
Materials science
Organic polymers
Physicochemistry of polymers
Polyester resins
Polyesters
Rubber
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Summary:A block-copolymer of the type A–B–A was synthesized from a commercial polybutadiene rubber (PBD) and an unsaturated polyester (UP) prepolymer. The reaction process was monitored via Fourier transform–infrared spectroscopy. The obtained copolymer was used as compatibilizing agent for UP/PBD blends. Fracture measurements performed on the cured materials demonstrated a substantial enhancement of tougheness in the presence of the copolymer. The morphological analysis of the fracture surfaces showed that the presence of the compatibilizing agent produced a strong reduction of the size of the rubber particles, a better interface adhesion and an increase of localized shear yielding in the UP matrix around the rubber particles.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1004596028476