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Effect of pressure and temperature on chromophore reorientation in a side-chain nonlinear optical polymer

✍ Scribed by Shane J. Strutz; L. Michael Hayden

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 225 KB
Volume: 36
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(19981115)36:15<2793::aid-polb13>3.0.co;2-o

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✦ Synopsis

Second harmonic generation (SHG) was used to measure the temperature dependence of the reorientation activation volume of the side-chain copolymer poly(disperse red 1 methacrylate-co-methyl methacrylate) (DR1-MMA). The decay of the SHG signal from poled films of DR1-MMA was recorded at hydrostatic pressures up to 3060 atm and at different temperatures between 25°C below the glass transition temperature (T g ) to 35°C above it. The activation volume, ⌬V*, decreased with increasing temperature. The data suggests that the coupling between chromophore reorientation and the long-range motion of the polymer is stronger for the DR1-MMA side-chain system than in previously measured guest-host systems.

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