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Frontal cationic curing of epoxy resins in the presence of defoaming or expanding compounds

Scognamillo, Sergio and Bounds, Chris and Thakuri, Suman and Mariani, Alberto and Wu, Qinglin and Pojman, John A. (2014) Frontal cationic curing of epoxy resins in the presence of defoaming or expanding compounds. Journal of Applied Polymer Science, Vol. 131 (11). eISSN 1097-4628. Article.

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DOI: 10.1002/app.40339

Abstract

Thermal frontal polymerization was carried out with trimethylol propane triglycidyl ether using two different BF3-amine complexes, B-950 and B-110 from Leepoxy, as initiators for cationic polymerization. The amounts of filler (kaolin or fumed silica), defoaming, or expansion agents were varied to study how the compositions affected the front velocity, expansion, and flexural modulus of the resulting epoxy resins. The polymer produced with B-950 initiator showed higher modulus than the polymers produced with B-110. Moreover, fumed silica created stronger materials than kaolin. The presence of BYK as a defoamer or an expansion agent such as the Expancel #80 was also able to affect significantly the mechanical properties. differential scanning calorimetry studies indicated that the conversion was complete and that kaolin and silica increased the rate of reaction.

Item Type:Article
ID Code:10198
Status:Published
Refereed:Yes
Uncontrolled Keywords:Properties and characterization, thermal properties, catalysts
Subjects:Area 03 - Scienze chimiche > CHIM/04 Chimica industriale
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:Wiley
eISSN:1097-4628
Deposited On:20 Oct 2014 09:02

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