| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.1363 |
| 발표분야 |
고분자 |
| 제목 |
Spectroscopic Analysis of Poly(bisphenol A carbonate) Using High Resolution 13C and 1H NMR |
| 초록 |
Quantitative structural and end-group analysis of poly(bisphenol A) carbonate (BPA-PC) were performed and number average molecular weights (Mn) were determined using 125.76 MHz 13C and 500.13 MHz 1H nuclear magnetic resonance (NMR) spectroscopy. BPA-PC with wide range of end-group ratios (0.26-2.83) and number average molecular weights (1,500-9,000 g/mol) were synthesized using melt transesterification by changing initial monomer ratio and reaction scheme. Results of the NMR analysis for the melt polymerized samples were compared with those of a commercial BPA-PC with Mn of 16,000 g/mol. NMR spectroscopy is a very selective and accurate method not only in quantification of both phenolic chain end and phenyl chain end-groups but also in structural analysis of main chain groups. By paying proper attention to the conditions of NMR spectrum collection, extremely small amount of end-groups (~ 0.02 per repeating unit) could be analyzed. The molecular weights determined by NMR end-group quantification agreed well with the molecular weights measured by GPC. |
| 저자 |
김재훈1, Hanna S. Gracz2, George W. Roberts2, Douglas J. Kiserow3, 김재덕1
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| 소속 |
1한국과학기술(연), 2North Carolina State Univ., 3U.S Army Research Office |
| 키워드 |
End-group analysis; poly(bisphenol A carbonate); NMR
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| E-Mail |
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| 원문파일 |
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