Citation: HOU Qingpu, HUANG Ying, YU Yunzhao. MODIFICATION OF EPOXY RESINS WITH PHENOLIC HYDROXYL-TERMINATED POLYSILOXANE[J]. Chinese Journal of Polymer Science, ;1995, 13(3): 235-243. shu

MODIFICATION OF EPOXY RESINS WITH PHENOLIC HYDROXYL-TERMINATED POLYSILOXANE

Received Date: 23 February 1994

Phenolic hydroxyl-terminated polysiloxanes were incorporated into epoxy resins to reducethe internal stress owing to the mismatch in coefficient of thermal expansion (CTE).Polysiloxane-epoxy resin block copolymers were made by a pre-reaction step prior to thecuring. In the cured resin, the domain size of the polysiloxane phase depended on thestructure of the phenolic hydroxyl-terminated polysiloxane. It was found that the modulus ofthe cured resin depended largely on the level of the modifier, while the CTE was affected greatly by the structure of the polysiloxane.By means of incorporating a few percent of methylphenylsiloxane unit into the polydimethylsiloxane chain,or by introducing more compatible end-capping groups,the compounds of more effective low stress modifiers were synthesized.
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