Abstract
Polymer foams are widely used as thermal insulators, packing materials, acoustic materials, etc. Microcellular plastics are the foams with micro scale bubbles, which has higher mechanical properties and more excellent light reflecting properties than the foams with large bubbles. Microcellular plastics are generally made from thermoplastic resins, however, few studies have been published on that of thermosets. Microcellular plastics made from thermosets (network polymers) can provide high mechanical properties and improve some properties, such as the electrical properties (lower dielectric loss). In this paper, the resent studies about controlling the cell morphologies of network polymer foams are reviewed.
