155  US 9,360,753 B2  156  -continued  -continued  Polymer 5  Mw~9,000  Mw/Mn~ 1.98  Polymer 3  Mw~7,500  Mw/Mn~ 1.79  ~  0  0  ~  O  0  ~  0  0  OH  Polymer 3  ~~  0  0  ~  ~’’ vy  OH  Polymer4  ~  ~  0  0  0  0  F*F  I#  F  F  :o-6:-o  ~I  ~  ~  0  0  ~  0  0  ¢  +  Polymer 5  Polymer 6  Polymer4  Mw~7,900  Mw/Mn~ 1.97 