Why is phenol more polar than alcohol?
The OH group of phenol is indeed more polarized - and a stronger acid - than the OH group of an aliphatic alcohol - maybe that is what you are asking. There are two contributions to this: 

(1) inductive: the sp2 hybridized carbon participating in the sigma bond to the OH group is more electron-withdrawing than the sp3-hybridized carbon of an alcohol bonded to OH; and 

(2) mesomeric: the phenyl group allows non-bonding electrons on oxygen to partially delocalize into the ring via pi bonding.