Synthesis and photoinduced polymerization of liquid crystalline diepoxidesfor bonding in the microsystem technique

The aim of this work is the synthesis of a liquid crystalline diepoxide 1 w ith phase transition temperatures below 100 degreesC for application micro- structured devices. Fm the cationic photopolymerization of 1 a photoinitiat or 5 containing a substituent for intramolecular photosensibilization was p repared. The photopolymerization from the liquid crystalline phase leads ac cording to X-ray and polarized optical microscopy to a crosslinked polymer with an ordered morphology. An adhesive test shows that the bonding strengt h of polymers obtained from the liquid crystalline phase is higher compared to polymers obtained from the crystalline or isotropic phase. Copyright (C ) 2000 John Wiley & Sons, Ltd.