Influence of 1,5-naphthalenediamine on thermomechanical properties of epoxy/copolyethersulphone blends

The use of 1,5‐naphthalenediamine (ND) as curing agents for epoxy blends was studied. The epoxy monomer was a standard diglycidyl ether of bisphenol A while as modifier a laboratory made copolyethersulphone (coPES) was considered. The coPES was added at three percentages: 10, 20, and 30% wt. The sti...

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Bibliographic Details
Published in:Polymer engineering and science 2013-01, Vol.53 (1), p.219-225
Main Authors: Cicala, G., Blanco, I., Latteri, A., Oliveri, L., Recca, A.
Format: Article
Language:English
Subjects:
Applied sciences
Bisphenol A
Chemical properties
Comparative analysis
Composition
Curing
Epoxy resins
Exact sciences and technology
Glass
Identification and classification
Mechanical properties
Phase transitions
Polymer industry, paints, wood
Polymeric composites
Properties and testing
Sulfones
Technology of polymers
Temperature effects
Thermal properties
Viscosity
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Summary:The use of 1,5‐naphthalenediamine (ND) as curing agents for epoxy blends was studied. The epoxy monomer was a standard diglycidyl ether of bisphenol A while as modifier a laboratory made copolyethersulphone (coPES) was considered. The coPES was added at three percentages: 10, 20, and 30% wt. The stiff structure of ND increased both viscosity and glass transition temperature of the blends. The blends cured by ND showed higher viscosity compared to resins cured by 3,3′‐diammino diphenylsulfone or 4,4′‐methylenebis(2,6‐diethylaniline). Blends with higher coPES content (20 and 30% wt) showed viscosity fluctuation suggesting phase separation initiation but the combination of high viscosity and reactivity hindered the demixing process. This effect resulted in single glass transition for all formulations confirming the absence of phase separation. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.23249