| 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. However, inevitable two-molecule termination reactions, including recombination and disproportionation, and various side reactions lead to the formation of dead species. These dead chain species must be separated from the living chain and analyzed their species and quantity. Because such studies will improve our comprehension of the nature of the ATRP process, and thus optimize the synthetic procedures so that the amount of by-products can be minimized. In this study, we introduce a polar end group in the ATRP process so that the living chain and dead chains have different numbers of polar end groups. And then the synthesized polymer was separated into living and dead chains by HPLC and analyzed by MALDI-MS. In this way, the types and amounts of dead chains can be determined. |
