US  2020/0192221  Al  100  Jun.  18,2020  -continued  Mw~9,900  Mw/Mn~ 1.79  -continued  Mw~9,300  Mw/Mn~ 1.77  Synthesis Example  2-3  Synthesis Example  2-4  [0196]  Synthesis of Polymer  3  [0197]  A 2-L flask was charged  with 1.9 g of Monomer  3,  5.2 g of  l-(cyclopropyl-l-yl)-1-methylethyl  methacrylate,  3.5 g of  3-fluoro-4-(methylcyclohexyloxy)styrene,  4.8 g of  3-hydroxystyrene,  11.2 g of PAG Monomer  3, and 40 g of  THF as solvent. The  reactor was cooled  at - 70° C. in  nitrogen atmosphere,  after which vacuum  pumping and  nitrogen blow were  repeated three times.  The reactor was  warmed up to room  temperature, whereupon  1.2 g of AIBN  was added. The reactor  was heated at 60°  C., whereupon  reaction ran for 15 hours.  The reaction solution  was poured  into 1 L of isopropyl  alcohol for precipitation.  The precipi› tated white solid was  collected by filtration  and vacuum  dried at 60°  C. yielding Polymer  3. Polymer 3 was analyzed  for composition by  $^{13}$C- and $^{1}$H-NMR and for Mw  and  Mw/Mn by GPC.  [0199]  A 2-L flask was charged  with 2.5 g of Monomer  4,  6.4 g of  l-methyl-1-cyclopentyl  methacrylate,  4.2 g of  4-hydroxystyrene,  11.0 g of PAG Monomer  2, and 40 g of  THF as solvent. The  reactor was cooled  at - 70° C. in  nitrogen atmosphere,  after which vacuum  pumping and  nitrogen blow were  repeated three times.  The reactor was  warmed up to room  temperature, whereupon  1.2 g of AIBN  was added. The reactor  was heated at 60°  C., whereupon  reaction ran for 15 hours.  The reaction solution  was poured  into 1 L of isopropyl  alcohol for precipitation.  The precipi› tated white solid was  collected by filtration  and vacuum  dried at 60°  C., yielding Polymer  4. Polymer 4 was analyzed  for composition by  $^{13}$C- and $^{1}$H-NMR and for Mw  and  Mw/Mn by GPC.  [0198]  Synthesis of Polymer  4  Polymer3  r- r- 0  0  0  0  -q  c5  Polymer 4  OH  r- 0  0  F2  0  C  Y’s03- 0  CF3 