Spirooxazine Photoisomerization and Relaxation in Polymer Matrices

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">Sample</td><td align="center"><svg height="14.625" id="M31" style="vertical-align:-3.25793pt" version="1.1" viewbox="0 0 14.6875 14.625" width="14.6875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.625)">
<g transform="translate(72,-60.3)">
<text transform="matrix(1,0,0,-1,-71.95,63.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑘</tspan>
</text>
<text transform="matrix(1,0,0,-1,-65.17,60.47)">
<tspan style="font-size: 8.75px; " x="0" y="0">0</tspan>
</text>
</g>
</g>
</svg> [s<sup>−1</sup>]</td><td align="center"><svg height="14.35" id="M32" style="vertical-align:-3.22282pt" version="1.1" viewbox="0 0 17.4 14.35" width="17.4" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.35)">
<g transform="translate(72,-60.52)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐸</tspan>
</text>
<text transform="matrix(1,0,0,-1,-63.02,60.66)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝑎</tspan>
</text>
</g>
</g>
</svg> [kJ·mol<sup>−1</sup>]</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left"><i>SPO-7OH P(MMA-BMA)</i></td><td align="center">5.46·10<sup>9</sup></td><td align="center">66.10</td></tr><tr><td align="left"><i>SPO-7OH PVP</i></td><td align="center">1.03·10<sup>12</sup></td><td align="center">84.72</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Activation energy (<svg height="14.35" id="M29" style="vertical-align:-3.22282pt" version="1.1" viewbox="0 0 17.4 14.35" width="17.4" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.35)">
<g transform="translate(72,-60.52)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐸</tspan>
</text>
<text transform="matrix(1,0,0,-1,-63.02,60.66)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝑎</tspan>
</text>
</g>
</g>
</svg>) and the Arrhenius preexponential factor (<svg height="14.625" id="M30" style="vertical-align:-3.25793pt" version="1.1" viewbox="0 0 14.6875 14.625" width="14.6875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.625)">
<g transform="translate(72,-60.3)">
<text transform="matrix(1,0,0,-1,-71.95,63.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑘</tspan>
</text>
<text transform="matrix(1,0,0,-1,-65.17,60.47)">
<tspan style="font-size: 8.75px; " x="0" y="0">0</tspan>
</text>
</g>
</g>
</svg>) for thermal relaxation process of <i>SPO-7OH</i> in polymer matrices.

International Journal of Polymer Science

Spirooxazine Photoisomerization and Relaxation in Polymer Matrices

Table 3