Simultaneously Increasing Impact Resistance and Thermal Properties of Epoxy Resins Modified by Polyether-Grafted-Epoxide Polysiloxane

Abstract

In this paper, polyether-grafted-epoxide polysiloxane (FEPMS) was synthesized via hydrosilylation among poly(methylhydrosiloxane) (PMHS), allyl polyoxyethylene polyoxypropylene ether (F6) and allyl glycidyl ether to modify Diglycidyl Ether of Bisphenol A (DGEBA). The morphology, thermal properties, and toughness of all cured samples were investigated by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and impact testing. Results indicated that grafted polysiloxane can be well dispersed in epoxy matrix, and the epoxy resin modified with FEPMS at relatively low addition levels exhibited higher thermal properties and improved toughness than the neat epoxy resin.

Keywords:

• Epoxy resin
• Grafted polysiloxane
• Impact strength
• Morphology
• Thermal properties

ACKNOWLEDGMENTS

This research was financially supported by the Key programs foundation of Science and Technology Bureau of Guangzhou city (No. 2006Z3-D0301).

Notes

^a Short for transparent.

^b Short for opaque.

^c Short for semitransparent.