Citation: LUO Xiaolie, ZHENG Sixun, MA Dezhu, HU Keliang. MECHANICAL RELAXATION AND INTERMOLECULAR INTERACTION IN EPOXY RESINS/POLY (ETHYLENE OXIDE) BLENDS CURED WITH PHTHALIC ANHYDRIDE*[J]. Chinese Journal of Polymer Science, ;1995, 13(2): 144-153. shu

MECHANICAL RELAXATION AND INTERMOLECULAR INTERACTION IN EPOXY RESINS/POLY (ETHYLENE OXIDE) BLENDS CURED WITH PHTHALIC ANHYDRIDE*

Received Date: 10 December 1993

The miscibility of the blend,composed of a bisphenol A epoxy resins (Diglycidyl etherof bisphenol A) (DGEBA) and poly(ethylene oxide) (PEO) and crosslinked by phthalicanhydride (PA) was studied using dynamic mechanical method. Single glass transitiontemperatures intermediate between the two pure components were observed for all blendlevels. The secondary relaxation mechanism should relate to not only diester linkage, butalso hydroxyether structural unit in the system. Fourier transform infrared spectroscopy (FTIR) is applied to study the curing reaction and intermolecular specific interaction of the system.The results indicate the PEO participates the crosslinking reaction,accelerates the curing reaction and make the reaction more perfect.The shifts of the hydroxyl band and carbonyl band demonstrate the presence of the intermolecular interaction in the cured blend.Moreover,the molecular interaction between the side hydroxyl in the hudroxyether units and the ether bond in PEO macromolecules is stronger.
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