CAJ | 학술논문

工业中大量生产的端羟基聚醚，由于羟基的反应活性不够，不能直接用于增韧胺类固化的环氧树脂.Bu2SnO-Bu3PO4缩合物能催化羟基对环氧基的加成反应.本文研究在Bu2SnO-Bu3PO4缩合物Sn-P6700的存在下以端羟基聚四氢呋喃(PTMG)增韧芳香胺4，4′-二氨基二苯砜(DDS)固化的环氧树脂.PTMG首先与环氧树脂反应生成嵌段共聚物，在固化时发生微相分离.分散相的尺寸在有利于增韧的范围内.PTMG在分子量与浓度适当时，能使树脂的断裂韧性大大提高；抗弯强度也有显著提高，而Tg和模量略有降低.
공업중대량생산적단간기취미，유우간기적반응활성불구，불능직접용우증인알류고화적배양수지.Bu2SnO-Bu3PO4축합물능최화간기대배양기적가성반응.본문연구재Bu2SnO-Bu3PO4축합물Sn-P6700적존재하이단간기취사경부남(PTMG)증인방향알4，4′-이안기이분풍(DDS)고화적배양수지.PTMG수선여배양수지반응생성감단공취물，재고화시발생미상분리.분산상적척촌재유리우증인적범위내.PTMG재분자량여농도괄당시，능사수지적단렬인성대대제고；항만강도야유현저제고，이Tg화모량략유강저.
The hydroxyl-terminated polyethers, though industrially widely available,have not been used as tougheners for amine-cured epoxy resins. The Bu2SnO-Bu3PO4 condensate Sn-P6700 was used to catalyze the addition of hydroxyl group to epoxy group. In the presence of this catalyst hydroxyl-terminated poly(tetramethylene glycols)(PTMG) were used directly as the toughener for the epoxy resin with 4,4′-diamino diphenyl sulfone as the curing agent. PTMG was first reacted with the epoxy resin to form block copolymers. Micro-phase separation took place upon curing. The particle size of the dispersed phase was in the range of 0.4 to 1.4　μm when the molecular weight was in the range of 700 to 2000,which was favorable to the toughening. When ca. 5 phr of PTMG was used as modifier, the toughness of the cured resin was improved greatly with a slight lowering of Tg and modulus.