caa a22 4500 463229460 CHVBK 20180405153237.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-1024-5 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1024-5 Study on structure and performance of polycarbonate urethane synthesized via different copolymerization methods [Elektronische Daten] [Jintang Guo, Meihua Zhao, Yan Ti, Bo Wang] Polycarbonate urethane (PCU) was synthesized using polycarbonate diol (PCN), 1, 4-butanediol (BD), and 4,4′-methylene bis(phenyl isocyanate) (MDI) as starting materials by both the melting one-shot method and the solution pre-copolymerization method, respectively. It was then characterized by Fourier transfer infrared spectroscopy (FT-IR), tensile test, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS). The results show that the tensile strength increases as the content of the hard segment increases. The decomposition upon heating was observed in two stages i.e. decompositions of hard and soft segments. There is an obvious soft-hard glass transition temperature area, which proves the existence of the micro-phase separation structure. The micro-separation phenomenon becomes more obvious as the content of the hard segment increases. The maximal distance of the hard segment micro-domain is estimated to be 2.932nm from SAXS results. The PCU synthesized via the solution pre-copolymerization method has better mechanical performance and micro-phase separation structure. Springer Science+Business Media, LLC, 2007 Guo Jintang Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut Zhao Meihua Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut Ti Yan Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut Wang Bo Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5508-5515 0022-2461 42:14<5508 2007 42 10853 https://doi.org/10.1007/s10853-006-1024-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1024-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Guo Jintang Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut NATIONALLICENCE 700 1- Zhao Meihua Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut NATIONALLICENCE 700 1- Ti Yan Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut NATIONALLICENCE 700 1- Wang Bo Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, P.R. China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5508-5515 0022-2461 42:14<5508 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer