Epoxy resins thermoplastic modification

Static and impact fracture data (room temperature measurements) mainly for epoxy resin systems is presented in Table 2. These relatively brittle materials require modification by, for instance, blending with a suitable rubber or thermoplastic to improve fracture toughness. Such improvements, however, depend not only on the types of materials but also on the composition and therefore the type of blend structure (e.g.. continuous-discrete phases. 

Another commonly used surface modification method of the reinforcing fibers consists in the treatment with aminoalkylsilanes, for example y-aminopropyltriethoxysilane. Glass fibers, which have been sized in this manner, are incorporated in numerous PPE-containing compositions. In addition, it is always necessary to modify the composition of the thermoplastic matrix to bond the fibers to the matrix. In addition to glass fibers, carbon fibers, e.g., epoxy resin-sized carbon fibers have been used for reinforcement. ... 

Varley R, Thermoplastic Modification of a Trifunctional Epoxy Resin System, in PhD thesis. Department of Materials Engineering. 1998, Monash University Clayton, Melbomne... 

Formulation and availability of epoxy resins and hardener systems lend themselves to modification for specific applications. It is to be hoped that epoxy resin formulations will be produced with known, and declared, ingredients of a purity comparable to the other polymers used in conservation, designed in combination with application techniques. Formulations of materials that cure to form thermoplastics should also be possible, thus enabling the application of the versatile epoxies to a much wider range of problems. 

The present chapter reviews our work dealing with the application of silica nanoparticles in the modification of polypropylene (PP) and epoxy resin according to the aforesaid concept. For the thermoplastic system, the improvement of the... 

Hedrick, J.L. Yilgdr, I. Wilkes, G.L. McGrath, J.E. Chemical modification of matrix resin networks with engineering thermoplastics. I. Phenolic hydroxyl terminated poly(aryl ether sulfone)-epoxy systems. Polym. Bull. 1985, 13, 201-208. 

Hed Hedrick, J. L., Yilgor, I., Jurek, M., Hedrick. J. C., Wilkes, G. L., McGrath, J. E. Chemical modification of matrix resin networks with engineering thermoplastics 1. Synthesis, morphology, physical behaviour and toughening mechanisms of poly (arylene ether sulfone) modified epoxy networks. Polymer 32 (1991) 2020-2032. 

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