About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Macromolecules
Paper
Broadening the scope of functional groups accessible in aliphatic polycarbonates by the introduction of RAFT initiating sites
Abstract
An approach to enlarge the range of functional cyclic carbonates by introducing a reversible addition-fragmentation chain transfer (RAFT) agent either as initiator or monomer was presented. After a 1 hr reaction time, a well-defined PLLA macroinitiator was obtained with retention of the trithiocarbonate group. The results show that a decrease in initial monomer concentration from 2 to 1 mol L -1 produces well-defined and narrowly dispersed copolymers. Comparing gel permeation chromatography (GPC) traces from the refractive index (RI) with UV-vis detectors demonstrates the complete incorporation of the 4-pyrene-1-butanol initiator in the polymer chain and the narrow molecular weight distribution. The results also show a conservation of 94% obtained from the relative intensity of acrylate protons at 5.5 ppm and amide methie protons from the repetitive units at 3.9 ppm.