| Abstract: | Epoxy-amine multiacrylic prepolymers were prepared by reactive extrusion using a one-step competitive reaction of diglycidyl ether of bisphenol A (DGEBA) and glycidyl methacrylate (GMA) with diamines. The technical and chemical limitations of the process were analyzed through a reactive extrusion diagram. Diphenyl was used as a tracer for residence time distribution (RTD) studies. Extrusion parameter analysis showed that the reactions are kinetically controlled and that an increase in reaction temperature leads to higher residence time and broader distributions. At constant temperature, we found a linear evolution of the average residence time (tm ) with kneading disk blocks and left-handed screw element length. The structure of the obtained oligomers was analyzed using a conversion distribution concept. © 1996 John Wiley & Sons, Inc. |
