The polymerization process of claim 1, wherein the catalyst system comprises one or more Lewis acid(s) represented by the formula M(RC=OO)nR???mX3-(m+n); wherein M is a Group 13 metal; each RC=OO is a monovalent hydrocarbacyl radical independently selected from the group independently selected from the C2 to C30 group consisting of an alkacyloxy, arylacyloxy, arylalkylacyloxy, alkylarylacyloxy rad