METHOD OF UTILIZING ISOCYANATE LINKAGES FOR FORMING MULTI-TIER CASCADE POLYMERS

摘要

A method of synthesizing multi-tier cascade polymers and the polymers made thereby are formed by reacting at least one tier of a polymer with a functionalized isocyanate having the following formula: O = C = N - C(CH2-R)3 with R being selected from the group including: a) - (CH2)n - CH2 - COOR' with R' being selected from the group consisting of alkyl, cycloalkyl, aryl, heteroaryl-polycycloalkyl, adamantyl, n = 0-10; - O - (CH2)n - CH2 - COOR'; b) - O - (CH2)n - CH2 - CN with R' being selected from the group consisting of alkyl (C-1 to C-20), cycloalkyl (C-3 to C-10), aryl heteroaryl, polycycloalkyl, adamantyl, n = 0-10; and c) - CH2 - (CH2)n - O - R'' with n = 0-10, R'' being selected from the group consisting of alkyl, cycloalkyl, aryl heteroaryl ester functionality, and a sulphur or a silicon atom bearing substituents selected from the group including: (I), (II), -SO2-R''', - SiR3 - CH2 - CH2 - CN, -CH2 - CH2 - COOR''' wherein R''' is alkyl (C-1 to C-20), cycloalkyl (C3-C-10), aryl, heteroaryl, polycycloalkyyl, adamantyl.