US 2020/0192221 Al  102  Jun.  18,2020  isopropyl alcohol for precipitation. The precipitated white  solid was collected by filtration and vacuum dried at 60°  C.,  yielding Polymer 7. Polymer 7 was analyzed for composi› tion by $^{13}$C- and $^{1}$H-NMR and for Mw and Mw/Mn by GPC.  [0207]  Comparative Polymer 2 was obtained by the same  procedure as in Synthesis Example 2-1 except that 2-(dim› ethylamino)ethyl methacrylate was used instead of Mono› mer  1.  Comparative Polymer 2 was analyzed for composi› tion by $^{13}$C- and $^{1}$H-NMR and for Mw and Mw/Mn by GPC.  [0208]  Comparative Polymer 3 was obtained by the same  procedure as in Synthesis Example 2-4 except that Monomer  4  was omitted. Comparative Polymer 3 was analyzed for  composition by $^{13}$C- and $^{1}$H-NMR and for Mw and Mw/Mn  by GPC.  [0206]  Comparative Polymer  1  was obtained by the same  procedure as in Synthesis Example 2-1 except that Monomer  1  was omitted. Comparative Polymer  1  was analyzed for  composition by $^{13}$C- and $^{1 }$H-NMR and for Mw and Mw/Mn  by GPC.  OH  r- 0  0  F2  0  C  y’s03- 0  CF3  Mw~9,300  Mw/Mn~ 1.69  Polymer 7  Comparative Synthesis Example  1  r- 0  0  D  OH  Mw~9,900  Mw/Mn~ 1.99  Comparative Polymer 1  Comparative Synthesis Example 2  r- r- 0  0  0  0  ~  D  /N’--.._  Comparative Polymer2  OH  Mw~9,700  Mw/Mn~ 1.91  Comparative Synthesis Example 3  Comparative Polymer3  r- 0  0  D  OH 