4-Allyloxy phenyl oxazoline was polymerized using methyl B-nitrobenzene sulfonate as an initiator (M/I - 100/1) in o-dichlorobenzene. The olefin group in the resulting polymer, PAPO, was quantitatively transformed to a -CH2-CH2-OH group by (1) hydroborating the olefin group using 9-BBN as a hydroborating agent in CHCl3/THF, and (2) oxidizing the hydroborated polymer. The polymer backbone is very stable in the hydroboration and oxidation environment. Both PAPO and the hydroxylated polymer, PAPO-OH, are crystalline and show birefringence. The PAPO-OH polymer crystallizes slowly due to its bulky side chain and strong interference of hydroxyl group with the packing of polymer molecules. However, once the polymer crystallizes, the side chains are extended and the -OH groups do not hydrogen bond with the carbonyl groups in the polymer backbone.