Study of Time and Temperature Dependency of Bulk Modulus for Molding Compound by Transient Bulk Creep Experiments Available to Purchase

Transient bulk creep experiments were performed to investigate the time and temperature dependency of the bulk modulus for epoxy molding compound. These, so called pressure jump volume relaxation experiments were done by applying positive and negative pressure jumps followed by a holding period at those pressure levels and the whole set of experiment was repeated at different temperatures. The observations are in the pressure range of 10 to 50 MPa and temperature range of 50 to 150° C. For negative pressure jumps (or expansion experiments) the bulk modulus was found to be almost independent of time. For positive pressure jumps (or compression experiments) time dependent volume decreases very slow. Compared to time and pressure, temperature dependency was of highest influence. A mathematical model has been proposed for the observed temperature and pressure dependency of the bulk modulus.