By Tetsuzo Akutsu, Hitoshi Koyanagi, Setsuo Takatani, Kazunori Kataoka, Jack G. Copeland, Stuart L. Cooper, Peer M. Portner, David B. Geselowitz

ISBN-10: 4431659641

ISBN-13: 9784431659648

ISBN-10: 4431705449

ISBN-13: 9784431705444

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Extra resources for Artificial Heart 2: Proceedings of the 2nd International Symposium on Artificial Heart and Assist Device, August 13–14, 1987, Tokyo, Japan

Sample text

Takahara, et al. 1. Chemical compositions of segmented polyurethaneureas and their glass transition temperature and melting temperature of soft segment Sample name Soft segment (Mn) Hard segment Tg/K• PTMG (856) EDA/DAM PTMG (1350) EDA/DAM PTMG (2000) EDA/DAM PTMG (856) PDA PTMG (1350) PDA PTMG (2000) PDA Biomer PEG (1000) EDA PEG (1000) TriMDA PCL (2000) EDA PCL (2000) TriMDA MDI-PTMG (856) MDI-PTMG (1350) MDI-PTMG (2000) MDI-PTMG (856) MDI-PTMG (1350) MDI-PTMG (2000) MDI-PTMG (1800) MDI-PEG (1000) MDI-PEG (1000) MDI-PCL (2000) MDI-PCL (2000) MDI-EDA/DAM (3/2) MDI-EDA/DAM (3/2) MDI-EDA/DAM (3/2) MDI-PDA MDI-PDA MDI-PDA MDI-EDA?

Heparin was connected to the polyurethane through the free amine or carboxyl groups of the spacer arm. Polyurethanes containing quaternary ammonium groups in the main chain or side chains Polymers of this type are represented by Q-PAEUU in Fig. 7 [9). A polyether bearing a tertiary amine group in the main chain or side chains was synthesized. Mixtures of the amine-containing polyether and PTMG in various molar ratios were reacted with MDI to yield prepolymers. The chain extension with PDA yielded polyetherurethaneurea containing tertiary 38 Y.

9 shows the insertion methods of heparinizing polyurethanes with different kinds of spacer groups such as 1,6-diaminohexane, 1,12diaminododecane, polyallylamine (molecular weight 10 000, 60 000) or caproic acid. Heparin was connected to the polyurethane through the free amine or carboxyl groups of the spacer arm. Polyurethanes containing quaternary ammonium groups in the main chain or side chains Polymers of this type are represented by Q-PAEUU in Fig. 7 [9). A polyether bearing a tertiary amine group in the main chain or side chains was synthesized.

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Artificial Heart 2: Proceedings of the 2nd International Symposium on Artificial Heart and Assist Device, August 13–14, 1987, Tokyo, Japan by Tetsuzo Akutsu, Hitoshi Koyanagi, Setsuo Takatani, Kazunori Kataoka, Jack G. Copeland, Stuart L. Cooper, Peer M. Portner, David B. Geselowitz


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