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실시간 in-situ IR을 사용한 벌크상 Poly(oxytetramethylene) Glycol과 Isophorone Diisocyanate의 반응속도론 연구

Title
실시간 in-situ IR을 사용한 벌크상 Poly(oxytetramethylene) Glycol과 Isophorone Diisocyanate의 반응속도론 연구
Author
노시태
Keywords
PTMG; IPDI; kinetics; polyurethane; real-time in-situ IR spectroscopy
Issue Date
2002-12
Publisher
한국공업화학회
Citation
공업화학, v. 13, no. 8, page. 815-819
Abstract
실시간 정량적 분석이 가능한 In-situ IR을 사용하여 poly(oxytetramethylene) glycol (PTMG)과 isophoron diisocyanate(IPDI) 간의 반응 속도론적 연구를 수행하였다. 반응 속도는 일련의 IR 스펙트럼에서 NCO 신축진동흡수(2265 cm^1) 및 C=O 신축진동흡수(1725 cm^1)대의 흡광도 변화를 모니터링하여 얻었다. 반응은 수산기와 이소시아네이트기의 농도에 대하여 각각 1차이고, 전체적으로 2차인 반응 속도법칙에 따랐다. PTMG와 IPDI의 벌크 중합에서 [NCOJ/[OH]=1.0일 때 반응 속도 상수로부터 구한 활성화 파라미터는 E_a = 61.07 kJ/mol, △H^* = 58.18 kJ/mol 및 △S^# = -95.98 J/molㆍK 이었다. Using quantitative real-time In-situ infrared (In-situ IR) spectroscopy, kinetic study of a reaction between isophoron diisocyanate (IPDI) and poly(oxytetramethylene) glycol (PTMG) was carried out. The reaction rate was obtained from monitoring the change of NCO (2265 cm^-1) and C=O (1725 cm^-1) stretching band in series IR spectra. The reaction was in accordance with the first-order reaction for each concentration of hydroxyl groups and isocyanate group, respectively, however, the overall reaction conformed to the second-order law. In the bulk polymerization between PTMG and IPDI, with ratio of [NCOJ/[OH] equal to 1.0 at various temperatures, the activation parameters obtained from the evaluation of kinetic data were △H^* = 58.18 kJ/mol, △S^# = -95.98 J/molㆍK and E_a = 61.07 kJ/mol.
URI
http://kiss.kstudy.com/thesis/thesis-view.asp?key=1979535https://repository.hanyang.ac.kr/handle/20.500.11754/158180
ISSN
1225-0112; 2288-4505
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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