New Low Temperature Cure High H/W OHC Composite System
A new composite system that can be cured at 132 ºC in and out of the autoclave in less than 2 hours exhibits excellent h/w properties, especially h/w OHC ( Hot/wet Open-Hole Compression) at 82 ºC. Using Positron Annihilation Lifetime Spectroscopy (PALS) the free volume in the polymer network can be determined. This paper will show that the reduction of free volume is directly correlated to decreasing water uptake and increasing the h/w properties such as Tg (glass transition temperature) and modulus. In addition to the high h/w properties, the 132 ºC cured carbon fiber composite provides low porosity allowing the use of lower cost tooling and reducing the cycle times compared to other low temperature cured carbon fiber epoxies.
Author: Jonathan Hughes
Conference: SAMPE Seattle 2017