Vinyl ester resins are widely used as thermosetting matrices for production of advanced composite and structural adhesives. They are obtained by end-capping unsaturated vinyl groups on a large variety of suitable oligomeric precursor, resulting in thermosetting resin with a good processability and outstanding end-use properties. In this paper we describe the shynthesis of a new methacrylated derivative of p-(2,3-epoxypropoxy)-α-methylstilbene exhibiting liquid crystalline phases, referred to as MD3A2. For the sake of comparison, a model compound has been synthesized with very similar chemical backbone. The model compound, referred to as MEP3A2, features isotropic phase and is derived form the commercially available Epon 825® epoxy resin (Shell Oil Company). Fracture resistance of samples has been tested according to ASTM D1002-72 (Strength Properties of Adhesives in Shear by Tension Loading) on aluminum supports and related to the presence of isotropic or liquid crystalline phases.
Self-toughening liquid crystalline vinyl ester adhesives / E., Amendola; M., Giamberini; Carfagna, Cosimo; Ambrogi, Veronica. - 180:(2002), pp. 153-167. (Intervento presentato al convegno EUROMAT 2001 nel 2002) [10.1002/1521-3900(200203)180:1<153::AID-MASY153>3.0.CO;2-1].
Self-toughening liquid crystalline vinyl ester adhesives
CARFAGNA, COSIMO;AMBROGI, VERONICA
2002
Abstract
Vinyl ester resins are widely used as thermosetting matrices for production of advanced composite and structural adhesives. They are obtained by end-capping unsaturated vinyl groups on a large variety of suitable oligomeric precursor, resulting in thermosetting resin with a good processability and outstanding end-use properties. In this paper we describe the shynthesis of a new methacrylated derivative of p-(2,3-epoxypropoxy)-α-methylstilbene exhibiting liquid crystalline phases, referred to as MD3A2. For the sake of comparison, a model compound has been synthesized with very similar chemical backbone. The model compound, referred to as MEP3A2, features isotropic phase and is derived form the commercially available Epon 825® epoxy resin (Shell Oil Company). Fracture resistance of samples has been tested according to ASTM D1002-72 (Strength Properties of Adhesives in Shear by Tension Loading) on aluminum supports and related to the presence of isotropic or liquid crystalline phases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
