The mechanical and microscopic aspects of the deformation and fracture of a poly (ether urethane-urea) spun arterial prosthesis.
The mechanical properties of a microporous, electrostatically spun poly (ether urethane-urea), used in the construction of arterial prostheses, have been examined, with particular reference to anisotropic, crack initiation processes and preconditioning. The results demonstrate considerable anisotropy in relation to samples derived from circumferential and longitudinal directions of the tube wall structure related to the spinning process. There is also a considerable difference in crack initiation on inner and outer surface of the arterial wall, again related to the processing conditions. The results provide an important contribution to an understanding of structure-property relationships in microporous arterial prosthesis.
Institute of Medical and Dental Bioengineering, University of Liverpool, UK.
D F
DF
Williams
S P
SP
Zhong
P J
PJ
Doherty
D001672:Biocompatible Materials / Q000737:chemistry*; D001807:Blood Vessel Prosthesis; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004548:Elasticity; D004563:Electrochemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012399:Rotation; D013314:Stress, Mechanical; D013499:Surface Properties; D013500:Surface Tension; D013718:Tensile Strength; D014783:Viscosity
D001672:Biocompatible Materials; D011108:Polymers; D011140:Polyurethanes; C031892:biomer; C044690:polyetherurethane urea