EVALUATION OF THE THERMAL DEGRADATION OF MECHANICAL PROPERTIES ON POLYESTER/ACRYLIC AND PHENOLIC-BASED GRP LAMINATES

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Authors
  1. Belanger, G.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);CEMP Belanger Ltd, St Germain de Grantham QUE (CAN)
Abstract
GRP composites are susceptible to fire damage due to the organic matrix materials used in their production. It has been demonstrated with the use of fire retardant additives that it is possible to improve their overall fire performance without generating excessive smoke and toxicity. A new approach to improve the level of fire retardancy of GRP composites consists of adding a protective insulation called "Fire Barrier", providing the possibility of using them as structural system. The objective of this approach is to minimize degradation of their mechanical properties, and similarly, improve their fire performance and safety. This report focuses on results obtained with intumescent agents, heat reflective additives and ceramic heat barriers. Moreover, when added to sodium silicate, mica and flakeglass were found to significantly improve the degree of intumescence and induce an additional fire resistance to FR laminates orginally formulated with polyester/acrylic and phenolic modified resins. Heat effects and retained mechanical properties of these different systems are summarized and discussed. It appears likely that intumescent coatings with heat reflective additives are more suitable for short-term application on composites for structure than for ceramic heat barriers.
Keywords
GRP composites
Report Number
DREA-CR-93-449 — Contractor's Report (Final)
Date of publication
01 Aug 1993
Number of Pages
73
DSTKIM No
95-01526
CANDIS No
149779
Format(s):
Hardcopy;Document Image stored on Optical Disk

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