Thermally stable crosslinked NLO materials based on maleimides
Journal
Polymer
Journal Volume
44
Journal Issue
1
Pages
143-155
Date Issued
2002
Author(s)
Abstract
A series of thermally stable second-order nonlinear optical (NLO) polymeric materials based on bismaleimide chemistry have been developed. Two maleimide containing chromophores with excellent thermal stability were incorporated into the bismaleimide polymer matrices to form interpolymer networks. Moreover, a full interpenetrating polymer network (IPN) was formed through simultaneous addition reaction of the bismaleimide, and sol-gel process of alkoxysilane dyes (ASD). Atomic force microscopy results indicate that the inorganic networks are distributed throughout the polymer matrices on the molecular scale. The silica particle sizes are well under 200 nm. Second harmonic coefficients, d33 of 6.9-57.0 pm/V have been obtained for the organic and organic/inorganic materials. Excellent temporal stability was obtained for these NLO materials at 100 °C. The dynamic thermal and temporal stabilities of the IPN system were much better than those of the crosslinked organic systems. © 2002 Elsevier Science Ltd. All rights reserved.
Type
journal article