content_image/894345.jpg content_image/894348.jpg content_image/894346.jpg content_image/894349.jpg content_image/894347.jpg
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 resulting white solid was collected by filtration and vacuum dried at 60° C., yielding Polymer 1 as white solid. The polymer was ana› lyzed for composition by $^{13}$C- and $^{1}$H-NMR and for Mw and Mw/Mn by GPC, with the results shown below. 

<img src='content_image/894345.jpg'>

[0162] Synthesis of Polymer 2 

[0163] A 2-L flask was charged with 5.5 g of 1-methyl› cyclohexyl methacrylate, 3.1 g of 4-(1-methylcyclopenty› loxy)styrene, 4.4 g of 3-oxo-2,7-dioxatricyclo[4.2.l.0 4 • 8 ] nonan-9-yl methacrylate, 6.7 g of Monomer 2, 11.0 g of PAG Monomer 1, and 40 g ofTHF 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 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 resulting white solid was collected by filtration and vacuum dried at 60° C., yielding Polymer 2 as white solid. The polymer was ana› lyzed for composition by $^{13}$C- and $^{1 }$H-NMR and for Mw and Mw/Mn by GPC, with the results shown below. 

<img src='content_image/894348.jpg'>

## Synthesis Example 2-2 

<img src='content_image/894346.jpg'>

[0164] Synthesis of Polymer 3 

[0165] A 2-L flask was charged with 7.8 g oftert-pentyl methacrylate, 4.4 g of 3-oxo-2,7-dioxatricyclo[4.2.l.0 4 • 8 ] nonan-9-yl methacrylate, 8.3 g of Monomer 3, 7.4 g of PAG Monomer 1, 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 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 resulting white solid was collected by filtration and vacuum dried at 60° C., yielding Polymer 3 as white solid. The polymer was ana› lyzed for composition by $^{13}$C- and $^{1 }$H-NMR and for Mw and Mw/Mn by GPC, with the results shown below. 

<img src='content_image/894349.jpg'>

<img src='content_image/894347.jpg'>

## Synthesis Example 2-3 

