Toughening studies on an ABS/PC blend-modified epoxy resin system

Abstract

Studies were carried out on the toughening of a bifunctional epoxy (diglycidyl ether of bisphenol-A) matrix system with an ABS/PC thermoplastic blend. The thermoplastic blend was incorporated into the epoxy matrix by particle dispersion and melt-mix methods. The unmodified and modified epoxy resin systems were cured with a stoichiometric quantity of diamino diphenyl methane (DDM). The cured castings were characterized by measurement of glass transition temperature (Tg) by DsC, evaluation of plane strain fracture toughness (Klc) by three-point bending tests and SEM analysis of non-etched and base/acid etched fracture surfaces. In genera] ABS/PC-modified (15% w/w) epoxy-resin-cured systems showed enhanced fracture toughness without lowering the glass transition temperature. The melt-mix method yielded higher fracture toughness than the particle dispersion method; this conclusion was also supported by scanning electron micrographs.

Preparation, characterization, and properties of organic silicone intermediate-modified epoxy resin copolymers

“…[1][2][3][4][5] However, their shortcomings, such as poor thermal degradation stability and the nature of brittleness, prevent their application from further expanding. Therefore, in order to obtain high-performance cured products of epoxy resin, which possess both the favorable thermal stability and toughness, a great deal of scientific researches have been conducted, such as physical blend method, 6,7 synthesis of new type epoxy resin, 8,9 addition of a flexible material into the epoxy matrix, 10,11 and preparation of chemically modified epoxy resin. 12,13 Among numerous the approaches attempting to improve the thermal stability and fracture toughness of epoxy resin, introduction of organosilicone into the epoxy resin network [14][15][16] have drawn much attention and turned out to be effective, because silicone encompasses many unique properties, such as high flexible backbone containing Si-O-Si, excellent thermal and oxidative stability, chemical resistance, low surface tension, and outstanding moisture resistance.…”

Preparation and Properties of a Fragrant Acrylonitrile–Butadiene–Styrene/Polycarbonate Alloy

“…ABS and its related alloys are of signifi cant commercial interest owing to their good mechanical performance and excellent electrical insulating properties, and they have been studied extensively over the past decades [1][2][3][4][5] . However, with the recent rapid expansion of the area of application of ABS and its alloys, an increasing number of instances call for ABS and its alloys to possess specifi c functional properties besides the intrinsic mechanical and electrical properties mentioned above.…”

Utilization of Waste Silk Fabric as Reinforcement for Acrylonitrile Butadiene Styrene Toughened Epoxy Matrix

“…Engineering thermoplastics are interesting materials as modifiers for epoxy resin from the viewpoint of the maintenance of mechanical and thermal properties for the matrix resins. Natarajan et al [5] studied the toughening of epoxy with ABS-PC blend plastics and noted that ABS-PC thermoplastic blend in general enhanced the fracture toughness of the epoxy.…”