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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

  • Joerg Zotzmann (a1), Steffen Kelch (a2), Armin Alteheld (a3), Marc Behl (a4) and Andreas Lendlein (a5)...

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 T sw, causes the device to changes its shape. The precise control of T sw is particularly challenging. It was investigated in how far T g, that can be used as T sw, 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 T g could be adjusted by selection of comonomer type and ratio without affecting the advantageous elastic properties of the polymer networks.

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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

  • Joerg Zotzmann (a1), Steffen Kelch (a2), Armin Alteheld (a3), Marc Behl (a4) and Andreas Lendlein (a5)...

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