Poly(ester urethane)s with Polycaprolactone Soft Segments: A Morphological Study 

 -  Journal of Polymer Science: Part A: Polymer Chemistry, 40(23), p.4117, 2002 .
<br/><br/> Two series of poly(ester urethane)s were prepared, containing polycaprolactone (PCL)as the soft segment with molecular weights of 530 and 2000. In each series, the soft-segment/hard-segment ratio was varied, and the morphological changes were monitored with differential scanning calorimetry, dynamic mechanical thermal analysis, wide-angle X-ray scattering, and scanning electron microscopy techniques. The polyurethanes with longer PCL segments retained their crystallinity, whereas those with shorter PCL segments did not. A morphological model is proposed, in which a continuous PCL-rich matrix contains both PCL crystallites and domains of urethane hard segments. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>POLY(ESTER URETHANE)S<br/>MORPHOLOGY<br/>WAXS<br/>POLYCAPROLACTONE<br/>BLOCK COPOLYMERS<br/>BIODEGRADABLE<br/>POLYURETHANES<br/>STRUCTURE-PROPERTY RELATIONS