| 초록 |
Atom transfer radical polymerization (ATRP) is used widely to prepare a variety of polymers in these days due to its ability to give narrow molecular weight (MW) distribution and various chain-end functionality. Therefore rigorous examination of the molecular weight distribution and purity of end functionality is highly desirable, but it has not been realized yet. MW distribution of ATRP-synthesized polymer is complicated because dead chain is formed while the chain is growing. This research focuses on separating ATRP-synthesized living chain and dead chain and quantitatively analyzing the amount and distribution of dead chains formed. Living chain has a bromine end group and dead chains do not. This bromine end group is converted to hydroxyl group completely and then, living chain with hydroxyl end group and dead chain without hydroxyl end group are separated by HPLC. In this way, the ratio of dead chains and MW distribution of both living and dead chains can be determined. |
