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Ability to Control the Glass Transition Temperature of Amorphous Shape-Memory Polyesterurethane Networks by Varying Prepolymers in Molecular Mass as well as in Type and Content of Incorporated Comonomers

Published online by Cambridge University Press:  31 January 2011

Joerg Zotzmann ,
Steffen Kelch ,
Armin Alteheld ,
Marc Behl  and
Andreas Lendlein
Joerg Zotzmann
Affiliation:
joerg.zotzmann@gkss.de, GKSS Research Center Geesthacht GmbH, Center for Biomaterial Development, Teltow, Germany
Steffen Kelch
Affiliation:
Kelch.Steffen@ch.sika.com, Sika Technology AG, Zurich, Switzerland
Armin Alteheld
Affiliation:
armin.alteheld@basf.com, BASF Aktiengesellschaft, Ludwigshafen, Germany
Marc Behl
Affiliation:
marc.behl@gkss.de, GKSS Research Center Geesthacht GmbH, Center for Biomaterial Development, Teltow, Germany
Andreas Lendlein
Affiliation:
lendlein@online.de, United States
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Abstract

The need of intelligent implant materials for applications in the area of minimally invasive surgery leads to tremendous attention for polymers which combine degradability and shape-memory capability. Application of heat, and thereby exceeding a certain switching temperature Tsw, causes the device to changes its shape. The precise control of Tsw is particularly challenging. It was investigated in how far Tg, that can be used as Tsw, of amorphous polymer networks from star-shaped polyester macrotetrols crosslinked with a low-weight linker can be controlled systematically by incorporation of different comonomers into poly(rac-lactide) prepolymers. The molecular mass of the prepolymers as well as type and content of the comonomers was varied. The Tg could be adjusted by selection of comonomer type and ratio without affecting the advantageous elastic properties of the polymer networks.

Keywords

amorphouspolymerbiomaterial
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1190: Symposium NN – Active Polymers , 2009 , 1190-NN01-09
Copyright
Copyright © Materials Research Society 2009

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