화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.8, 815-819, December, 2002
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실시간 In-situ IR을 사용한 벌크상 Poly(oxytetramethylene) Glycol과 Isophorone Diisocyanate의 반응속도론 연구
Kinetic Study of the Reaction Between Poly(oxytetramethylene) Glycol and Isophorone Diisocyanate in Bulk by Real-Time In-situ IR
김정균, 조항규, 노시태, 강신춘†
  • 한양대학교 화학공학과, 안산 425-791
Jung Kyun Kim, Hang Kyu Cho, Si Tae Noh, and Shin Choon Kang†
  • Department of Chemical Engineering, Hanyang University, Ansan 425-791, Korea
E-mail:
초록
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 cm1) 및 C=O 신축진동흡수(1725 cm1)대의 흡광도 변화를 모니터링하여 얻었다. 반응은 수산기와 이소시아네이트기의 농도에 대하여 각각 1차이고, 전체적으로 2차인 반응 속도법칙에 따랐다. PTMG와 IPDI의 벌크 중합에서 [NCO]/[OH] = 0.1일 때 반응 속도 상수로부터 구한 활성화 파라미터는 Ea=61.07 kJ/mol, ΔH#=58.18 kJ/mol 및 ΔS#= -95.98 J/mol·K이었다.
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 groupsnd isocyanate group, respectively, however, the overall reaction conformed to the second-order law. In the bulk polymerization between PTMG and IPDI, with ratio of [NCO]/[OH] equal to 1.0 at various temperatures, the activation parameters obtained from the evaluation of kinetic data were ΔH#=58.18 kJ/mol, ΔS#= -95.98 J/mol·K and Ea=61.07 kJ/mol.
Keywords:PTMG;IPDI;kinetics;polyurethane;real-time in-situ IR spectroscopy
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