Studies on the phase separation of poly(ether imide)-modified cyanate ester resin.
writer：Tao, Q. S.; Wang, M. H.; Gan, W. J.; Yu, Y. F.; Tang, X. L.; Li, S. J.; Zhuang, J. H.
keywords：thermoplastics, thermoset, phase separation
source：期刊
specific source：Journal of Macromolecular Science-Pure and Applied Chemistry 2003, A40, (11), 1199-1211.
Issue time：2003年
A high temperature thermosetting bisphenol-A dicyanate (BADCy) was blended with a novel thermoplastic poly(ether imide) (PEI) at various composition. The phase separation behavior during isothermal curing was studied by differential scanning calorimeter (DSC), time-resolved light scattering (TRLS), scanning electron microscopy (SEM), and theological measurements. The results suggested that the phase structure changed from separated phase, via co-continuous phase, to phase inversion with the increase of the PEI content. The curing conversion of BADCy was slightly affected by the composition in the blend and the curing rate was decreased with the increase of PEI content. The co-continuous phase morphology was attributed to a spinodal decomposition. The initial concentration of PEI had an effect on the theological behavior during phase separation. It was found by tensile test that the blend with 15 wt.% PEI had higher tensile strength and elongation at break than that without PEI.