Crosslinkable maleimide copolymers for stable NLO properties


Serhatli I. , YAGCI Y. , HATTEMER E., ZENTEL R., SCHMALZLIN E., HOHENADL S., ...More

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.39, no.10, pp.1589-1595, 2001 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 10
  • Publication Date: 2001
  • Doi Number: 10.1002/pola.1135
  • Title of Journal : JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Page Numbers: pp.1589-1595

Abstract

Second-order, nonlinear optical polymers based on epoxy-substituted methylvinylisocyanates and N-substituted maleimides were synthesized and characterized with spectral and thermal analysis. The photocrosslinking and thermal-crosslinking reactions of copolymers with different chromophore contents were studied. Thermally induced crosslinking during the poling process, performed at the glass-transition temperature (T-g), was prevented by T-g being decreased through the addition of a plasticizer. Electrooptic coefficients (r(33)), measured for crosslinked and noncrosslinked systems, had similar absolute values and relaxation dynamics. This behavior was explained in terms of the similar rotational mobility of the chromophore units and the paucity of crosslinking sites. (C) 2001 John Wiley & Sons, Inc.