Materials

Technician working on carbon fiber for automotive application. 

Technician working on carbon fiber for automotive application. 

Cure Monitoring of SMC/BMC: The curing behavior of Sheet Molding Compound (SMC) was observed using the LT-451 Dielectric Cure Monitor. Bulk Molding Compound (BMC) is the generally the same material as SMC but in bulk form, so the analysis of results apply to BMC as well.

Cure Monitoring of Carbon Fiber Prepreg: Samples from a single batch of carbon fiber reinforced prepreg (CFRP) were tested for repeatability and effect of temperature on cure rate. The data from dielectric cure monitoring clearly show that: 
(1) Critical Points identify characteristic features of the cure such as minimum ion viscosity, maximum slope of log(ion viscosity) and the time to a chosen end of cure and, 
(2) Cure time decreases as cure temperature increases, as expected for a reaction that is thermally driven.

Cure Monitoring of Near-UV Cured Gel Nail Polish: Lambient Technologies tested the base gel for a nail polish system that requires near-ultraviolet light to cure.

Cure Monitoring of Polyurethane: Lambient Technologies studied room temperature cures of a polyurethane resin with three different catalysts. An LT-451 Dielectric Cure Monitor made measurements during each test at excitation frequencies from 0.1 Hz to 100 kHz for 24 to 36 hours.

Acrylic Adhesive Cure: Lambient Technologies tested samples of a commercially available two-part acrylic structural adhesive with the LT-451 Dielectric Cure Monitor.