The use of 1,5-naphthalenediamine (ND) as curingagents for epoxy blends was studied. The epoxy monomerwas a standard diglycidyl ether of bisphenol Awhile as modifier a laboratory made copolyethersulphone(coPES) was considered. The coPES was addedat three percentages: 10, 20, and 30% wt. The stiffstructure of ND increased both viscosity and glasstransition temperature of the blends. The blends curedby ND showed higher viscosity compared to resinscured by 3,30-diammino diphenylsulfone or 4,40-methylenebis(2,6-diethylaniline). Blends with higher coPEScontent (20 and 30% wt) showed viscosity fluctuationsuggesting phase separation initiation but the combinationof high viscosity and reactivity hindered thedemixing process. This effect resulted in single glasstransition for all formulations confirming the absenceof phase separation
Influence of 1,5-naphthalenediamine on thermomechanical properties of epoxy/Copolyethersulphone Blends
CICALA, Gianluca;BLANCO, Ignazio;LATTERI, ALBERTA;OLIVERI, LUDOVICA MARIA;RECCA, Antonino
2013-01-01
Abstract
The use of 1,5-naphthalenediamine (ND) as curingagents for epoxy blends was studied. The epoxy monomerwas a standard diglycidyl ether of bisphenol Awhile as modifier a laboratory made copolyethersulphone(coPES) was considered. The coPES was addedat three percentages: 10, 20, and 30% wt. The stiffstructure of ND increased both viscosity and glasstransition temperature of the blends. The blends curedby ND showed higher viscosity compared to resinscured by 3,30-diammino diphenylsulfone or 4,40-methylenebis(2,6-diethylaniline). Blends with higher coPEScontent (20 and 30% wt) showed viscosity fluctuationsuggesting phase separation initiation but the combinationof high viscosity and reactivity hindered thedemixing process. This effect resulted in single glasstransition for all formulations confirming the absenceof phase separationI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
