New potentially biodegradable polyurethanes

New potentially biodegradable, thermoplastic multiblock copolymers from poly(lactic acid), poly (ε‐caprolactone) and/or poly(lactic acid‐ε‐caprolactone) copolymers were synthesized using toluene diisocyanate (TDI) as chain extender and poly(ethylene glycol) as intrinsic plasticizer. The structures o...

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Veröffentlicht in:Polymers for advanced technologies 2006-11, Vol.17 (11-12), p.945-953
Hauptverfasser: Borda, Jenő, Kéki, Sándor, Bodnár, Ildikó, Németh, Nóra, Zsuga, Miklós
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container_end_page 953
container_issue 11-12
container_start_page 945
container_title Polymers for advanced technologies
container_volume 17
creator Borda, Jenő
Kéki, Sándor
Bodnár, Ildikó
Németh, Nóra
Zsuga, Miklós
description New potentially biodegradable, thermoplastic multiblock copolymers from poly(lactic acid), poly (ε‐caprolactone) and/or poly(lactic acid‐ε‐caprolactone) copolymers were synthesized using toluene diisocyanate (TDI) as chain extender and poly(ethylene glycol) as intrinsic plasticizer. The structures of the resulting copolymers were unambiguously confirmed by NMR, IR and matrix assisted laser desorption ionization‐time‐of‐flight mass spectrometry (MALDI‐TOF MS) methods. The effects of the molar ratio of the polymers to TDI on the molar mass and on the mechanical properties of the resulting multiblock copolymers were also investigated. The mechanical properties such as tensile strength, Young's modulus, Shore A hardness and elongation at break of the multiblock copolymers suitable for making foils are compared with those of some relevant commercially available plastics. According to the comparative mechanical tests, some mechanical properties of the new biodegradable copolymers exceed those of the conventional plastics. Copyright © 2006 John Wiley & Sons, Ltd.
doi_str_mv 10.1002/pat.822
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subjects biodegradable
copolymerization
MALDI
polyurethanes
thermoplastics
title New potentially biodegradable polyurethanes
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