Studies on Modification of Epoxy Resins with Silicon-Epoxy Block Copolymers I. Toughening of Cured Epoxy Resins by the Modification with Silicone Block Copolymers.

Toxicity studies of cured epoxy resins.

Epoxy Resins in Electron Microscopy

A method of embedding biological specimens in araldite 502 (Ciba) has been developed for materials available in the United States. Araldite-embedded tissues are suitable for electron microscopy, but the cutting qualities of the resin necessitates more than routine attention during microtomy. The rather high viscosity of araldite 502 also seems to be an unnecessary handicap. The less viscous epo...

On the velocity-dependent fracture toughness of epoxy resins

In a recent paper [1], Drs Selby and Miller described three methods of determining the fracture toughness (R), or equivalently, the fracture surface energy (23') for an epoxy resin. These methods are respectively (a) Berry's method, (b) Irwin-Kies equation and (c) Gurney's irreversible work area method. While the experimental data obtained from tapered double-cantilever beam (TDCB) specimens su...

The University of Alabama in Huntsville Investigations of Toughening Mechanisms of Epoxy Resins

Composite material technology has been applied to the solid rocket booster by the development of a carbon filamentepoxy resin case which yields a net increase of 4000 Ibs. in payload in the shuttle. The question of reusability of the new composite tanks has not yet been answered and will depend on the toughness of the matrix resin. The present study was aimed at providing conditions whereby tes...

Water diffusion behavior in epoxy resins with various fluorine contents.

In this work, novolac resin with perfluorinated side chains was synthesized and cured with o-Cresol novolac epoxy resin to obtain epoxy resins with various fluorine contents. Attenuated total reflection Fourier transform infrared spectroscopy (ATR/FT-IR) was used to monitor the in situ water diffusion process in these systems. The diffusion coefficient of water first increased and then slightly...