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Morphology of unsaturated polyester resin‐additive blends
Author(s) -
Suspene Laurent,
Gerard JeanFrançois,
Pascault JeanPierre
Publication year - 1990
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760302405
Subject(s) - materials science , charpy impact test , copolymer , morphology (biology) , composite material , acrylonitrile , scanning electron microscope , polyester , epoxy , natural rubber , izod impact strength test , polymer blend , phase (matter) , nitrile rubber , particle size , polymer , chemical engineering , microstructure , ultimate tensile strength , organic chemistry , chemistry , biology , engineering , genetics
The morphologies and impact behavior of blends based on an unsaturated polyester matrix and different added rubbers were studied by scanning electron microscopy (SEM). These rubbers were prepared from a carboxy‐terminated acrylonitrile‐butadiene copolymer (CTBN). The introduction of an epoxy‐terminated triblock copolymer (ETON) by exchanging 10% by weight of the CTBN rubber compatibilizes the initial blend by reducing the interfacial tension between the components. Consequently, the morphology of dispersed phase was modified: decreasing of the particle size and reducing the number of large particles. For a blend with 5 phr of rubber, Charpy impact behavior was enhanced and the number of catastrophic failures was reduced. This study displays the existence of relationships between the interfacial tension between components and the morphology of the resulting materials.