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Title: Additive effects on the toughening of unsaturated polyester resins

Abstract

An elastomer additive, carboxy-terminated acrylonitrile-butadiene copolymer, was used for toughening in the free radical cross-linking copolymerization of unsaturated polyester (UP) resins. For molded parts, Charpy impact behavior was generally enhanced and the number of catastrophic failures was reduced. The miscibility and interfacial properties of additive and resin blends play important roles in the toughening process. Phase-diagram studies showed that the elastomer additive is immiscible with the UP resin and is phase-separated from the resin matrix during curing. This phase-separation phenomenon is similar to that in the low-profile mechanism of UP resins. Additive-resin system miscibility greatly influences curing morphology. Microvoids occurred in the additive phase of cured resin because of shrinkage stress. The intrinsic inhomogeneity of the polyester network and the existence of microvoids in the final product limit the toughening effect of additives on unsaturated polyester resins. 49 refs., 13 figs., 3 tabs.

Authors:
 [1]; ;  [2]
  1. Centre de Recherches et de Technologies de Verneuil, Verneuil-en-Halatte (France)
  2. Institut National des Science Appliquees de Lyon, Villeurbanne (France)
Publication Date:
OSTI Identifier:
76234
Report Number(s):
CONF-900802-
TRN: 94:009880-0015
Resource Type:
Conference
Resource Relation:
Conference: 200. American Chemical Society (ACS) national meeting, Washington, DC (United States), 26-31 Aug 1990; Other Information: PBD: 1993; Related Information: Is Part Of Toughened plastics I: Science and engineering; Riew, C.K.; Kinloch, A.J. [eds.]; PB: 567 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; RESINS; MECHANICAL PROPERTIES; POLYESTERS; ACRYLONITRILE; SOLUBILITY; ADDITIVES; COPOLYMERS; PHASE STUDIES; CROSS-LINKING; VOIDS; CHARPY TEST

Citation Formats

Suspene, L, Yang, Y S, and Pascault, J P. Additive effects on the toughening of unsaturated polyester resins. United States: N. p., 1993. Web.
Suspene, L, Yang, Y S, & Pascault, J P. Additive effects on the toughening of unsaturated polyester resins. United States.
Suspene, L, Yang, Y S, and Pascault, J P. 1993. "Additive effects on the toughening of unsaturated polyester resins". United States.
@article{osti_76234,
title = {Additive effects on the toughening of unsaturated polyester resins},
author = {Suspene, L and Yang, Y S and Pascault, J P},
abstractNote = {An elastomer additive, carboxy-terminated acrylonitrile-butadiene copolymer, was used for toughening in the free radical cross-linking copolymerization of unsaturated polyester (UP) resins. For molded parts, Charpy impact behavior was generally enhanced and the number of catastrophic failures was reduced. The miscibility and interfacial properties of additive and resin blends play important roles in the toughening process. Phase-diagram studies showed that the elastomer additive is immiscible with the UP resin and is phase-separated from the resin matrix during curing. This phase-separation phenomenon is similar to that in the low-profile mechanism of UP resins. Additive-resin system miscibility greatly influences curing morphology. Microvoids occurred in the additive phase of cured resin because of shrinkage stress. The intrinsic inhomogeneity of the polyester network and the existence of microvoids in the final product limit the toughening effect of additives on unsaturated polyester resins. 49 refs., 13 figs., 3 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/76234}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 31 00:00:00 EST 1993},
month = {Fri Dec 31 00:00:00 EST 1993}
}

Conference:
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