Vanillin-Based Polymers—part II: Synthesis of Schiff Base Polymers of Divanillin and Their Chelation with Metal Ions

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">Polymer</td><td align="center"><svg height="15.8375" id="M12" style="vertical-align:-3.39069pt" version="1.1" viewbox="0 0 37.549999 15.8375" width="37.549999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,0,0,-.012,11.388,15.638)"><path d="M257 449q92 0 154 -65t62 -158q0 -112 -67 -175t-150 -63q-98 0 -158.5 66.5t-60.5 154.5q0 59 21 106.5t54.5 75.5t71 43t73.5 15zM244 416q-48 0 -81 -47t-33 -128q0 -96 38 -158t99 -62q51 0 82 43.5t31 139.5q0 91 -36 151.5t-100 60.5z" id="x6F"></path></g><g transform="matrix(.012,0,0,-.012,17.313,15.638)"><path d="M524 0h-209v26q44 5 55 18t11 65v167q0 114 -91 114q-50 0 -109 -51v-235q0 -50 10 -61.5t55 -16.5v-26h-217v26q51 5 62 17t11 61v206q0 47 -9.5 58.5t-50.5 19.5v23q82 15 139 40v-79l67 47q47 30 83 30q60 0 94.5 -40t34.5 -112v-193q0 -50 10 -61.5t54 -16.5v-26z
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</svg>/°C</td><td align="center">DTG/°C</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left"><b>4a</b></td><td align="center">255</td><td align="center">345, 492</td></tr><tr><td align="left"><b>4b</b></td><td align="center">245</td><td align="center">375, 478</td></tr><tr><td align="left"><b>4c</b></td><td align="center">250</td><td align="center">350, 475</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Decomposition onset temperature (<svg height="15.8375" id="M11" style="vertical-align:-3.39069pt" version="1.1" viewbox="0 0 37.549999 15.8375" width="37.549999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>) and derivative thermogravimetric analysis (DTG) peaks data of divanillin Schiff base polymers (<b>4a–c</b>).

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tab2

Table 2

Table 2: Vanillin-Based Polymers—part II: Synthesis of Schiff Base Polymers of Divanillin and Their Chelation with Metal Ions 