THE THERMAL DEGRADATION OF EPOXIDE RESINS
ON REVIEWING THE RELEVANT LITERATURE, IT BECOMES APPARENT THAT DESPITE THE CONSIDERABLE AMOUNT OF WORK THAT HAS BEEN DONE IN THIS FIELD THERE IS STILL RELATIVELY LITTLE KNOWN ABOUT THE MECHANISM OF THE THERMAL DEGRADATION OF EPOXY RESINS. ALTHOUGH IT HAS BEEN ESTABLISHED THAT THE DEGRADATION PROCEEDS (PARTLY AT LEAST) THROUGH A FREE RADICAL MECHANISM, IT IS IMPOSSIBLE TO STATE WITH ANY CERTAINTY THE REACTIONS WHICH LEAD TO THE FORMATION OF PARTICULAR BREAKDOWN PRODUCTS. IN FURTHER STUDIES ON EPOXIDE DEGRADATION THE FOLLOWING POINTS SHOULD BE CONSIDERED: (1) SAMPLE GEOMETRY AND PHYSICAL STATE OF THE MATERIAL MAY INFLUENCE THE COURSE OF DEGRADATION THROUGH SECONDARY REACTIONS, TEMPERATURE GRADIENTS, AND DIFFUSION PHENOMEN. (2) THE RESULTS OBTAINED IN WORK OF THIS KIND MAY, TO SOME EXTENT, BE A FUNCTION OF THE METHODS OF DEGRADATION AND ANALYSIS. TOO MUCH RELIANCE SHOULD NOT THEREFORE BE PLACED ON DATA OBTAINED FROM ANY ONE METHOD. (3) IMPURITIES AND ADDITIVES IN COMMERCIALLY AVAILABLE EPOXIDE RESINS MAY INFLUENCE THEIR THERMAL STABILITY. IT IS THEREFORE DESIRABLE TO WORK WITH CAREFULLY CHARACTERIZED EPOXIDE AND HARDENERS TO ESTABLISH THE FUNDAMENTAL DEGRADATION REACTIONS. /AUTHOR/
-
Supplemental Notes:
- Vol 59, No 8, PP 32-39
-
Authors:
- Bishop, D P
- SMITH, D A
- Publication Date: 1967-8
Media Info
Subject/Index Terms
- TRT Terms: Additives; Diffusion (Optics); Epoxy resins; Impurities; Temperature gradients; Thermal stability
- Uncontrolled Terms: Degradation; Free radicals
- Subject Areas: Geotechnology; Highways; Materials;
Filing Info
- Accession Number: 00216171
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 15 1994 12:00AM