TOUGHENING OF EPOXY RESINS BY HYDROXYL-TERMINATED POLYETHER WITH Bu2SnO-Bu3PO4 CONDENSATE AS CATALYST

WU Qi; XU Jianjun; MA Yue; YU Yunzhao

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TOUGHENING OF EPOXY RESINS BY HYDROXYL-TERMINATED POLYETHER WITH Bu2SnO-Bu3PO4 CONDENSATE AS CATALYST

Research Article | 更新时间：2021-03-19

- TOUGHENING OF EPOXY RESINS BY HYDROXYL-TERMINATED POLYETHER WITH Bu2SnO-Bu3PO4 CONDENSATE AS CATALYST
- Acta Polymerica Sinica Issue 1, Pages: 68-72(2001)
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- Published：20 February 2001，
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WU Qi, XU Jianjun, MA Yue, YU Yunzhao. TOUGHENING OF EPOXY RESINS BY HYDROXYL-TERMINATED POLYETHER WITH Bu2SnO-Bu3PO4 CONDENSATE AS CATALYST. [J]. Acta Polymerica Sinica (1):68-72(2001)
DOI：

WU Qi, XU Jianjun, MA Yue, YU Yunzhao. TOUGHENING OF EPOXY RESINS BY HYDROXYL-TERMINATED POLYETHER WITH Bu2SnO-Bu3PO4 CONDENSATE AS CATALYST. [J]. Acta Polymerica Sinica (1):68-72(2001) DOI：

摘要

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Bu2 SnO-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.

Abstract

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 1.4μm 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.

关键词

环氧树脂端羟基聚四氢呋喃Bu_2SnO-Bu_3PO_4缩合物增韧

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