Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester

0381122 - ÚMCH 2013 RIV NL eng J - Journal Article
Džunuzović, J. V. - Pergal, M. V. - Poreba, Rafal - Vodnik, V. V. - Simonović, B. R. - Špírková, Milena - Jovanović, S.
Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester.
Journal of Non-Crystalline Solids. Roč. 358, č. 23 (2012), s. 3161-3169. ISSN 0022-3093. E-ISSN 1873-4812
R&D Projects: GA ČR GAP108/10/0195
Institutional research plan: CEZ:AV0Z40500505
Institutional support: RVO:61389013
Keywords : polyurethane network * hyperbranched polyester * poly(dimethylsiloxane)
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.597, year: 2012

Six polyurethane networks were synthesized from Boltorn® hyperbranched polyester of the second pseudo generation, α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4′-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties.
Permanent Link: http://hdl.handle.net/11104/0211658