Citation: WANG Xia, ZHAO Binyi, LI Zhengyi, YU Yunzhao. STUDIES ON EPOXY RESINS MODIFIED WITH POLY (BUTYLENE TEREPHTHALATE)-b-POLY (TETRAMETHYLENE GLYCOL)*[J]. Chinese Journal of Polymer Science, ;1997, 15(1): 84-91. shu

STUDIES ON EPOXY RESINS MODIFIED WITH POLY (BUTYLENE TEREPHTHALATE)-b-POLY (TETRAMETHYLENE GLYCOL)*

Received Date: 17 January 1996

Poly(butylene terephthalate )-b-poly (tetramethylene glycol) (PBT-b-PTMG) was usedas rheology modifier for the epoxy resin. The segmental copolymer formed spherulites inthe epoxy medium. This copolymer was very effective in endowing yield stresses to theliquid resin. The PTMG segment brought in a lowering of the dissolution temperature ofthe spherulites in the epoxy gel. The cured resin with PBT-b-PTMG as modifier was two-phase materials. The rheology modifier improved the mechanical properties of the cured resin as well.The flexible PTMG segments,however,were not in favour of the toughening effect of the modifier.This was attributed to the large domain size of the dispersed phase.
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