Modified epoxies as studied by ultrasonic methods
The cure of modified epoxy resins was monitored by taking ultrasonic measurements. From the time dependence of acoustic parameters it was possible to elucidate the different stages of curing, the gel point, the dynamic glass transition, and the end of the crosslinking reactions. The chemical composition of the epoxy systems was varied in a systematic manner and its influence on the ultrasonic properties was studied. The results show that ultrasonic methods serve as a useful tool for the characterization of curing reactions and highly crosslinked networks.
Key wordsUltrasonic velocity and attenuation epoxy crosslinks moduli curing
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- 3.Ranachowskij J, Łaš T (1965) Postepy Techniki Wysokich Napięć 4:365, WarsawGoogle Scholar
- 5.Shchurow AF, Gubkina NL (1974) Fr Khim Tekhnol 2:43Google Scholar
- 7.Baeri JC, Courdille JM, Dumas J, Rajaonarison R (1980) J Physique-Lettres 41:L369Google Scholar
- 9.Krylovich VJ, Ermolenko IN, Alexenko VI (1981) Zavod Lab 50:41Google Scholar
- 11.Bailey RT, North AM, Pethrick RA (1980) Molecular Motion in High polymers. Oxford University Press, Oxford.Google Scholar
- 13.Härtel E, Fedtke M, Plaste und Kautchuk, in pressGoogle Scholar
- 15.Meischner Ch, Hauptmann P (1985) Exp Technik Physik 33:175Google Scholar
- 16.Hauptmann P, Alig I, Wartewig S (1984) Wiss Zeit TH Leuna-Merseburg 26:499Google Scholar
- 17.Burchard W (1985) Ber Bunsenges Phys Chem 89:1154Google Scholar
- 20.Häusler KG, Hauptmann P, Meischner Ch, Fedtke M, Härtel E, Wartewig S (1987) Polymer Comm 28:154Google Scholar