Amine-terminated telechelic polymers and precursors thereto and methods for their preparation

摘要

Disclosed is a method of preparing terminally functionalized telechelic polymers using a cationic living polymer product or a terminal tert-chloride chain end of a carbocationic quasiliving polymer product, which comprises quenching the polymer product with a functionalized N-substituted pyrrole to thereby introduce the functionalized N-substituted pyrrole at the terminal reactive polymer chain end(s). A method is also disclosed whereby the N-substituent may be derivatized to a basic amine containing functional group. Also disclosed are the terminal functionalized polyisobuyl N-substituted pyrrole compounds where the polyisobutyl group is substituted at the 2 and 3 position of the N-substituted pyrrole.

主权项

1. A method for preparing a telechelic polymer of formula I: wherein:
R1 and R2 are independently in each —(CR1R2)— unit, hydrogen or alkyl from 1 to 6 carbon atoms;m is an integer from 2 to 20;Z1 is —F, —Cl, —Br, —I, —At, —CN, —NC, —N3, —NCO, —OCN, —NCS, or —SCN; andR′ is a monovalent polyolefin group;comprising:
a) ionizing a polyolefin in the presence of a Lewis acid or mixture of Lewis acids to form a carbocation-terminated polyolefin; and b) reacting the carbocation-terminated polyolefin from step (a) with an N-substituted pyrrole of formula II: