Thermal degradations of 4,4Ј-diphenylmethane diisocyanate-based thermoplastic polyurethane elastomers were conducted and investigated as functions of heating conditions by using thermogravimetric analysis, ultraviolet-visible (UV-vis) spectroscopy, gel permeation chromatography (GPC), and Fourier tr
Dielectric properties of segmented polytetramethyleneoxide-based polyurethanes
✍ Scribed by Zoran S. Petrović; Ferenc Koco; Laslo Horvath; Nesto Dulić
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 592 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Mechanical and dielectric properties of two series of segmented polyurethanes having soft segment concentration of 50 and 70% and a varying degree of crosslinking through the hard segment were studied. The degree of crosslinking in each series was varied by varying the butane diol/trimethylol propan
Various segmented polyurethane materials with a polyurethane hard segment (HS) content of 40 wt % were prepared by bulk polymerization of a poly(tetramethylene ether) glycol with M n of 2000, 1,4-butanediol, and various diisocyanates. The diisocyanates used were pure 4,4Ј-diphenylmethane diisocyanat
## Abstract Various segmented polyurethanes with a hard segment content of about 50 wt% were prepared from 4,4′‐diphenylmethane diisocyanate (MDI), a poly(tetramethylene adipate) glycol with an __M__~n~ of 2000, and various combinations of aliphatic diols as chain extenders by a one‐shot, hand‐cast
Polyurethanes, containing well-defined assemblies of perfluoro-polyether (PFPE or hexafluoropropene oxide oligomer), polydimethylsiloxane (PDMS), and polyethylene glycol (PEG) segments, exhibit oleophobic, hydrophobic, and hydrophilic properties in response to the polarity of the contacting medium.