TY - DATA T1 - Accessing New Materials through Polymerization and Modification of a Polycarbonate with a Pendant Activated Ester PY - 2013/02/26 AU - Amanda C. Engler AU - Julian M. W. Chan AU - Daniel J. Coady AU - Jeannette M. O’Brien AU - Haritz Sardon AU - Alshakim Nelson AU - Daniel P. Sanders AU - Yi Yan Yang AU - James L. Hedrick UR - https://acs.figshare.com/articles/journal_contribution/Accessing_New_Materials_through_Polymerization_and_Modification_of_a_Polycarbonate_with_a_Pendant_Activated_Ester/2440315 DO - 10.1021/ma4001258.s001 L4 - https://ndownloader.figshare.com/files/4082977 KW - reaction conditions KW - functionalized polycarbonates KW - Graft polymers KW - postpolymerization modification KW - diblock copolymers KW - cyclic monomer KW - triflic acid KW - GPC KW - pendant KW - Pendant Activated EsterFunctionalized polycarbonates KW - Accessing New Materials KW - 5 kDa KW - 6F KW - form homopolymers KW - Controlled ROP N2 - Functionalized polycarbonates were synthesized by organocatalytic ring-opening polymerization (ROP) of a cyclic monomer with a pendant activated ester (MTC-OC6F5) followed by a postpolymerization modification with both small molecules and macromolecules. Controlled ROP to form homopolymers and diblock copolymers was realized using catalytic quantities of triflic acid. For the homopolymers, a linear relationship between [M]0/[I]0 and molecular weight (by GPC) demonstrated the living nature of the polymerization. Poly­(MTC-OC6F5) was functionalized under mild reaction conditions with a variety of amines to obtain polymers with pendant primary, secondary, and tertiary amides. Graft polymers with a high grafting density of over 87% were synthesized using amine-terminated poly­(ethylene glycol) of two different molecular weights (2 and 5 kDa). The preparation of poly­(MTC-OC6F5) provides a means of accessing a wide range of functional polycarbonates with minimal synthetic steps. This new methodology for the formation of functionalized polycarbonates provides a simple and versatile platform for the synthesis of new and innovative materials. ER -