环氧树脂共混物相结构的调控方法研究

研究了环氧树脂(E51)/聚砜(PSF)共混物相结构的控制方法.通过抑制相分离、控制预固化的反应程度控制环氧树脂的分子量,固化后可获得不同的共混物相结构.依据红外测定的固化反应程度设定固化程序,可有效控制共混物的相结构.加入促进剂三氟化硼-乙基胺(BTF-EA)可提高固化反应速度,使相分离结构在早期被抑制,以获得小微区的相结构.

Studies on Phase Morphology Control of Epoxy/PSF Blends

Effective ways to control the phase morphology of the epoxy(E51)/PSF/DDS blends were studied. Scanning electron microscopy(SEM) and FTIR results revealed that epoxy resins with different molecular weight were formed by changing the degree of precure conversion, and the later cure would result in phase morphology with different average size of epoxy particles. The cure process to effectively control the phase morphology of epoxy blends could be made according to the FTIR results. Boron trifluoride ethylamine complex(BTF EA) was effective to accelerate the cure reaction of epoxy resin with DDS. The rise in cure reaction speed induced the phase structure with smaller domain size. This could be explained by the quick formation of crosslinking network that locked in the phase separation at the earlier stage in the system.