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Advances in Polyurethane Biomaterials by Stuart L. Cooper, Jianjun Guan

By Stuart L. Cooper, Jianjun Guan

Advances in Polyurethane Biomaterials brings jointly a radical overview of advances within the houses and functions of polyurethanes for biomedical functions. the 1st set of chapters within the publication presents a tremendous evaluation of the basics of this fabric with chapters on homes and processing tools for polyurethane. additional sections conceal major makes use of reminiscent of their tissue engineering and vascular and drug supply applications

Written by way of a world workforce of best authors, the ebook is a entire and crucial reference in this very important biomaterial.

  • Brings jointly in-depth assurance of a huge fabric, crucial for plenty of complicated biomedical applications
  • Connects the basics of polyurethanes with cutting-edge research of important new functions, together with tissue engineering and drug delivery
  • Written by way of a crew of hugely a professional authors with a number of specialist and educational event, overseen through an editor who's a number one professional within the field

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Extra info for Advances in Polyurethane Biomaterials

Sample text

1) Gu et al. [23] used ozone to pretreat a Pellethane® surface and later functionalized the surface with polyacrylic acid. 1. A modified COF measurement method for testing finished catheters was reported by Kazmierska [24]. 2. A motor winds the strand and pulls the catheter against a weighted surface in a water bath. The friction force is measured by a forcemeter and the normal force is the difference of gravity force of the weight subtracted by the buoyancy force. 2 Trackability measurement When a medical prosthesis such as a catheter, guide wire, angioplasty balloon, or stent is inserted to a blood vessel, external force is needed to advance the prosthesis into the right position.

2 Dynamic contact angle Polyurethane is a segmented polymer with both a hard segment (diisocyanate/ chain extender crystalline region) and a soft segment (polyols amorphous region). Essentially, all polymers with nonhomogeneous surfaces will reorganize, to a certain extent, to expose their hydrophilic segment toward the polymer/water interface when contacting water [31–39]. Such nonhomogeneity can only be fully evaluated with the dynamic CA method. In the dynamic CA method, information of both advancing CA (θadv) and receding CA (θrec) is obtained.

Microphase separation of segmented poly(urethane urea) block copolymers. Macromolecules 2000;33(17):6353–9. [63] He Y, Zhang X, Runt J. The role of diisocyanate structure on microphase separation of solution polymerized polyureas. Polymer 2014;55(3):906–13. [64] Nakamae K, Nishino T, Asaoka S. Microphase separation and surface properties of segmented polyurethane—Effect of hard segment content. Int J Adhes Adhes 1996;16(4):233–9. [65] Pongkitwitoon S, et al. Temperature dependent microphase mixing of model polyurethanes with different intersegment compatibilities.

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