화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.21, No.1, 98-103, January, 2004
DOI10.1007/BF02705385  Export Citation
A Study on the Reaction Kinetics of Dendrimerization by FT-IR Spectroscopy: Propagation of PAMAM Dendrimer on Silica Gel
Ruijiang Li, and Jie Bu†
  • Institute of Chemical and Engineering Science, Ayer Rajah Crescent Block 28 Unit 02-08, Singapore 139959
E-mail:
Solid-phase PAMAM dendrimer was synthesized by the repetitive addition of a branching unit to silica gel. All synthesis steps were monitored by infrared spectroscopy to investigate the reaction rate. Based on the measurements of infrared spectra, which showed the ester group varied as a function of reaction time, a reaction kinetics model was proposed and simulated. FT-IR and TGA measurements suggested that a ‘cross-linking’ reaction occurred in amidation process and generated structural defects, which decreased the grafted amount of dendrimer on silica gel. In addition, the analysis of reaction rate constants indicated that due to the formation of an intermediate, Michael addition of methyl acrylate to diamine was probably hindered by steric crowding.
Keywords:PAMAM Dendrimer;Silica Gel;Grafting;Solid Phase;FT-IR;Reaction Kinetics;Structure Defect
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