The cross-linking reactions of 4,4'-diaminodiphenyl sulphone (DDS) with stoichiometric quantities of glycidyl ether- or tetraglycidyl amine-based epoxy resins were monitored using chemiluminescence (CL) and rheometry. It was found that, when a sample was cured isothermally in air, the CL profile increased to a maximum, then decreased again. The maximum was found to correspond well with the gel time (tgel), as measured by rheometry. This observation is discussed in relation to the chemical reactions occurring within the material and the physical state of the matrix. The effect of impurities in DDS on the gel time of these epoxy resins is reported.
Get full access to this article
View all access options for this article.
References
1.
[1] Senturia S D, Sheppard N F, Lee H L and Marshall S B1983SAMPE J.1922-22
2.
[2] Levy R L and Schwab S D1991Polym. Composites1296-101
3.
[3] George G A1981Developments in Polymer Degradation vol 3, ed N Grassie (London: Applied Science) p 173-173
4.
[4] George G A and Schweinsberg D P1987J. Appl. Polym. Sci.332281-2292
5.
[5] Burdon 3 W 1989 Thesis University of Sussex
6.
[6] Jay R R1964Anal. Chem.36667-668
7.
[7] Anon1989Determination of 1,2-epoxy groups in epikote resins and cardura E0IOShell Resins Epikote Product Manual EK 1.5.2
8.
[8] DRA Farnborough 1989 Determination of epoxy equivalent of resin (preferred method) Private communication
9.
[9] Billingham N C and O'Keefe E S1985Polym. Deg. Stab.10137-137
10.
[10] Koziclski K A 1992 Thesis University of Sussex
11.
[11] Tung C Y M and Dynes P J1982J. Appl. Polym. Sci.27569-574
12.
[12] Schiers J, Bigger S W, Then E T H and Billinghamrn N C1993J. Polym. Sci.B 36287-297
13.
[13] St John N A 1993 Thesis University of Queensland
14.
[14] de Bakker C J, St John N A and George G A1993Polymer34716-725
15.
[15] Kozielski K A, George C A, St John N A and Billingham N C1994High Perform. Polym6257-262
16.
[16] St John N A and George G A1992Polymer332679-2688
17.
[17] Billingham N C, Gijsman P J and Then E T H1990Polym. Deg. Stab.34263-263
