Thermal and mechanical properties of multiple-component aliphatic degradable polyurethanes

0440982 - ÚMCH 2015 RIV US eng J - Journal Article
Poreba, Rafal - Kredatusová, Jana - Hodan, Jiří - Serkis, Magdalena - Špírková, Milena
Thermal and mechanical properties of multiple-component aliphatic degradable polyurethanes.
Journal of Applied Polymer Science. Roč. 132, č. 16 (2015), 41872_1-41872_12. ISSN 0021-8995. E-ISSN 1097-4628
R&D Projects: GA ČR(CZ) GA13-06700S
Institutional support: RVO:61389013
Keywords : differential scanning calorimetry * mechanical properties * polyurethanes
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.866, year: 2015

Macroscopic thermal and mechanical properties of complex aliphatic polycarbonate-based polyurethane (PU) films containing degradable ester units in PU backbone were studied by a combination of several experimental techniques. Differential scanning calorimetry (DSC) revealed that the synthesized oligomeric diol (DL-L) contributes (in addition to polycarbonate diol) to the formation of soft-segment domains, while the hard-segment domains are formed from 1,6-diisocyanatohexane (HDI) and butane-1,4-diol (BD). Three main phase transitions were detected by DSC and by dynamic mechanical thermal analysis. Thermogravimetric analysis (TGA) of two-component PUs showed that the PU made from DL-L and HDI is the least thermostable product, while the PU made from polycarbonate diol and HDI is the most stable one. The differences in the thermal stability of different four-component PUs are not important. Tensile properties very sensitively reflect the changes in composition and in microstructure of PU samples; the best tensile properties exhibits the degradable sample containing the equimolar ratio of hydroxyl groups of macrodiol, oligomeric diol DL-L and butane-1,4-diol.
Permanent Link: http://hdl.handle.net/11104/0244675