Nov. 22, 2018  US 2018/0335696 Al  89  -continued  [0138]  Synthesis of Polymer 5  [0139]  A 2-L flask was charged with 8.4 g of l-methyl- 1-cyclopentyl methacrylate, 4.8 g of 4-hydroxystyrene, 9.1  g of PAG Monomer 5, 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 tempera› ture, whereupon 1.2 g of AIBN as polymerization initiator  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 white  solid precipitate was collected by filtration and dried in  vacuum at 60°  C., yielding Polymer 5 in white solid form.  Polymer 5 was analyzed for composition by $^{13}$C- and  $^{1}$H-NMR and for Mw and Mw/Mn by GPC.  [0140]  Synthesis of Polymer 6  [0141]  Polymer 6 was obtained in white solid form by the  same procedure as in Synthesis Example 5 aside from using  7.1 g of PAG Monomer 6 instead of PAG Monomer 5.  Polymer 6 was analyzed for composition by $^{13}$C- and  $^{1}$H-NMR and for Mw and Mw/Mn by GPC.  Mw  ~  11,900  Mw/Mn~l.75  Mw~ll,900  Mw/Mn~ 1.76  Mw~ 12,300  Mw/Mn~ 1.71  Synthesis Example 6  Synthesis Example 5  Polymer 6  Polymer 5  r  a  a  I  ~  OH  0  0  ~  0  0  -continued 