화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.13, No.3, 212-217, June, 2005
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Characterization for Pyrolysis of Thermoplastic Polyurethane by Thermal Analyses
Suk-Hwan Kang, Dong-Cheol Ku, Jung-Hun Lim, Yun-Kyu Yang, Noh-Seok Kwak, and Taek-Sung Hwang†
  • School of Chemical Engineering, Chungnam National University, Daejeon 305-764, Korea
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The pyrolysis kinetics of polyurethanes synthesized from polycaprolactone diol (PCL) and diisocyanate (HDI, H12MDI) using catalysts such as dibutyltin dilaurate (DBTDL) were studied by a thermogravimetric (TG) technique, which involved heating the sample at the rates of 10, 20 and 30 oC/min. The effect of the kind of diisocyanate and the hard segment contents on the activation energy and reaction order were examined at conversions ranging from 1 to 100%. The activation energies at first increased slowly with increasing conversion. Also, differential scanning calorimetry (DSC) was used to investigate the structural differences in each polyurethane. DSC can reveal the melting behavior, in terms of the glass transition temperature (Tg), which is known to vary as a function of the stoichiometry and processing conditions.
Keywords:polyol;diisocyanate;activation energy;glass transition temperature
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