Improving Thermal Performance of High Internal Phase Emulsion Polymerized Foams with Maleimide Based Monomers

Abstract

The influence of three N-substituted maleimides on the thermal performance of high internal phase emulsion (HIPE) polymerized foams were investigated. N-propylmaleimide, Nbutylmaleimide, and N-cyclohexylmaleimide were copolymerized with styrene and crosslinked with either divinylbenzene or Bis(3-ethyl-5-methyl-4-maleimide-phenyl)methane in a HIPE polymerization process. All maleimide modifiers produced increases in the foam glass transition temperature (Tg) as a function of the maleimide concentration. The degree of Tg improvement was strongly dependent on the N-substituted maleimide used during processing.

PolyHIPE: IPNs, hybrids, nanoscale porosity, silica monoliths and ICP-based sensors

“…PolyHIPE, with their porous structure, have demonstrated advantageous structural properties and absorbency for use as absorbents [6][7][8][9][10]. PolyHIPE have also been used in ion exchange systems [11,12] and as heat resistant structural foams [13][14][15][16]. PolyHIPE can be synthesized from a wide variety of monomers and have a wide range of potential applications.…”

“…Several high temperature polyHIPE have been investigated: the copolymerization of N-substituted maleimide and bismaleimide [14][15][16] and the copolymerization of a maleimide-terminated aryl ether sulfone macromonomer using a non-aqueous HIPE [24]. Polysilsesquioxanes (SSQ) have attracted much attention for their extraordinary heat and fire resistance [25].…”