| abstract |
Polymers are functionalized at chain ends thereof with silane-containing carboxyl groups of the formula (I) n nwhere R 1 and R 2 are the same or different and are each an H, alkyl, alkoxy, cycloalkyl, cycloalkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl or aralkoxy radical; R 3 and R 4 are the same or different and are each an H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl radical; and A is a divalent organic radical. |