Hollow Glass-Bead Modified Epoxy Resin for Printed Circuts

Sub-micro-morphology, mechanical properties, thermal properties and water absorption of epoxy /hollow glass-bead blend for printed circuto were studied systematically. The results showed that, incorporation of hollow glass-beads into the system improved the mechanical properties and the thermal properties of epoxy resin. Especially, using smaller size of glass-beads, the T g of the blend can be increased by 5 ℃. If glass-beads were treated with the coupling agent and surfactant was added into the blend,the system obtained the optimum properties. Adding a few glass-beads into epoxy resin decreases the water-absorption of the blend, however, with the increase of the glass-bead contents, the water-absorption of the blend increases. After the surfactant was added, the system kept low water-absorption.