Synthesis and characterization of interpenetrating polymer networks with nonlinear optical properties

✍ Scribed by P. R. Srikanth Sharma; Peiguang Zhou; Harry L. Frisch

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 769 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19960430)34:6<1049::aid-pola14>3.0.co;2-7

✦ Synopsis

We report the synthesis and characterization of interpenetrating polymer networks (IPNs) exhibiting nonlinear optical (NLO) properties. The network consists of aliphatic polycarbonate urethane (PCU) and poly(methy1 methacrylate-co-N,N-disubstituted urea), with a nonlinear optical (NLO) chromophore incorporated into N,N-disubstituted urea. The full IPNs have only one T,, as determined by differential scanning calorimetry (DSC), together with scanning electron microscopy (SEM) observations, suggest a single phase morphology. The thin films of IPNs are transparent and the unpoled samples produced second harmonic generation (SHG) signals at room temperature. This result indicates that the NLO chromophore is oriented noncentrosymmetrically during the IPN formation process and is tightly held between the permanent entanglements of the two component networks of the IPN. 0 1996 John Wiley & Sons, Inc.

interpenetrating polymer networks (IPNs) differential scanning calorimetry (DSC) scanning electron microscopy (SEM) nonlinear optical (NLO) properties second harmonic generation (SHG)