The temperatures predicted to occur at the centerline of a one-inch thick composite comprised of glass fabric and vinyl ester with four-tenths volume fraction of fiber are shown in this figure. - Notice that at a 65-degree mold temperature. the internal temperature at the centerline peaks at 180 degrees at 40 minutes, while the system cured with a mold temperature of 55 degrees exhibits a lower peak temperatures at a longer time. - This result suggest that the 65-degree cure will shorten the cure cycle and hence could be the preferred choice. - Notice, however, that the large peak temperature may cause the unreacted styrene to boil, thereby changing the concentration of styrene in the material as well as creating voids.