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Analysis of PS-Br synthesized by ATRP using MALDI-MS TOF

2009년 8월 21일 14시 19분 45초
금24I4구 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 17시 : 50분
고분자화학 - General Topics on Polymer Science I (대학원생 발표)
저자 및
김기현, 장태현, 백현종1
포항공과대학교 화학과, Korea
1부산대학교 고분자공학과, Korea
The polymer synthesized by conventional radical polymerization is difficult to control the molecular characteristics such as molecular weight distribution (MWD), chain end functionalities, chain architectures or compositions. In this regard, recently developed controlled radical polymerization (CRP) technique can do a far better job. For example, polymerization of styrene by atom transfer radical polymerization (ATRP), which is one of the CRP, yield PS-Br with a relatively narrow MWD, which in turn can be used as a macroinitiator to synthesize a block copolymer. Despite the importance of the end-functional macroinitiator, its characterization cannot be said to be done rigorously. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a powerful tool to characterize the molecular characteristics of polymers. A few research groups have tried to analyze the PS-Br by MALDI MS, but the reactivity of the end group of PS-Br resulted complex spectra to make the interpretation difficult. In this work, we analyzed MALDI MS spectra to successfully elucidate the by-products from reaction of the end-group during the MALDI process.