NDLI: Influence of the chemical structure of poly(urea-urethane-siloxane)s on their morphological, surface and thermal properties

Content Provider	Springer Nature Link
Author	Balaban, Milica Antić, Vesna Pergal, Marija Godjevac, Dejan Francolini, Iolanda Martinelli, Andrea Rogan, Jelena Djonlagić, Jasna
Copyright Year	2013
Abstract	Segmented poly(urethane-urea-siloxane)s (PUUS) were synthesized using 4,4′-methylenediphenyl diisocyanate (MDI) and ethylene diamine (ED) as the hard segment components and hydroxypropyl-terminated poly(dimethylsiloxane) (PDMS) as the soft segment component, where the hard segment content ranged from 38 to 65 wt%. Segmented PUUSs were prepared by a two-step polymerization procedure in tetrahydrofuran/N-methylpyrrolidone (THF/NMP) mixture with a large proportion of polar solvent. The structure, composition and hard segment length were determined by 13C NMR and two-dimensional correlation spectroscopy. Thermal, mechanical, small-angle X-ray scattering and hydrogen bonding analyses indicated the formation of the microphase-separated copolymers with high tensile strength. Globular superstructures observed in the copolymer films by scanning electron microscopy (SEM) and atomic force microscopy (AFM) were probably arisen from the microstructural organization of the MDI-ED segments, depending on their content and length. The PUUS copolymers showed high water resistance and became more hydrophobic with increasing weight fraction of PDMS.
Starting Page	2493
Ending Page	2518
Page Count	26
File Format	PDF
ISSN	01700839
Journal	Polymer Bulletin
Volume Number	70
Issue Number	9
e-ISSN	14362449
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-06-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Segmented polyurethane-ureas Hydroxypropyl-terminated PDMS Quantitative 13C NMR spectroscopy Thermal properties Morphology Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics

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