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[0211] 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. 

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[0212] 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. 

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[0213] Comparative Polymer 3 was obtained by the same procedure as in Synthesis Example 2-2 except that Monomer 2 was omitted and l-methyl-1-cyclopentyl methacrylate was used instead of l-methyl-1-cyclohexyl methacrylate. Com› parative Polymer 3 was analyzed for composition by $^{13}$C› and $^{1}$H-NMR and for Mw and Mw/Mn by GPC. 

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