End-linked calibrated polypropylene-oxide chains. NMR approach to segmental fluctuations

1997 ◽  
Vol 5 (2) ◽  
pp. 201-221 ◽  
Author(s):  
J.P.Cohen Addad ◽  
L. Pellicioli ◽  
J.J.H. Nusselder
Keyword(s):  
Polypropylene Oxide

Effects of the Polypropylene Oxide Number on the Surface Properties of a Type of Extended Surfactant

2018 ◽  
Vol 21 (3) ◽  
pp. 335-341 ◽  
Author(s):  
Mengdie Lv ◽  
Yawen Zhou ◽  
Shan Wang ◽  
Fu Han ◽  
Baocai Xu
Keyword(s):  
Surface Properties ◽  
Extended Surfactant ◽  
Polypropylene Oxide

Polyurethane-Polyurea Membranes for Blood Oxygenation

2006 ◽  
Vol 514-516 ◽  
pp. 863-867 ◽  
Author(s):  
M. Isabel Pinto ◽  
Denise P. Queiroz ◽  
M. Helena Gil ◽  
Antonio Jorge Guiomar ◽  
Maria Norberta de Pinho
Keyword(s):  
Blood Oxygenation ◽  
Polypropylene Oxide ◽  
Soft Segments ◽  
Structural Versatility

The structural versatility of polyurethane based membranes is enhanced through the introduction of two soft segments to obtain new membranes with improved hemocompatibility. Crosslinked polyurethane/urea membranes with two soft segments were prepared by extending a polypropylene oxide-based tri-isocyanate terminated prepolymer (PU) with polybutadiene diol (PBDO). The ratio of PU to PBDO was 100/0 and 90/10. The membranes were characterised in terms of permeation towards O2 and CO2 and their hemocompatibility was evaluated through hemolysis and thrombosis experiments. It was found that the membrane with PBDO had the highest permeability to O2 and CO2 and it was non-hemolytic and less thrombogenic.

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