UNIVERSI
TÄ
TS-
BIBLIOTHEK
P
ADERBORN
Anmelden
Menü
Menü
Start
Hilfe
Blog
Weitere Dienste
Neuerwerbungslisten
Fachsystematik Bücher
Erwerbungsvorschlag
Bestellung aus dem Magazin
Fernleihe
Einstellungen
Sprache
Deutsch
Deutsch
Englisch
Farbschema
Hell
Dunkel
Automatisch
Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist
gegebenenfalls
nur via VPN oder Shibboleth (DFN-AAI) möglich.
mehr Informationen...
Universitätsbibliothek
Katalog
Suche
Details
Zur Ergebnisliste
Ergebnis 5 von 9
Datensatz exportieren als...
BibTeX
Urea hard segment morphology in flexible polyurethane foam
Journal of polymer science. Part B, Polymer physics, 1998-03, Vol.36 (4), p.573-581
Neff, Raymond
Adedeji, Adeyinka
Macosko, Christopher W.
Ryan, Anthony J.
1998
Details
Autor(en) / Beteiligte
Neff, Raymond
Adedeji, Adeyinka
Macosko, Christopher W.
Ryan, Anthony J.
Titel
Urea hard segment morphology in flexible polyurethane foam
Ist Teil von
Journal of polymer science. Part B, Polymer physics, 1998-03, Vol.36 (4), p.573-581
Ort / Verlag
New York: John Wiley & Sons, Inc
Erscheinungsjahr
1998
Link zum Volltext
Quelle
Wiley Online Library Journals Frontfile Complete
Beschreibungen/Notizen
A series of flexible polyurethane slabstock foam samples were prepared with varying water content and studied using transmission electron microscopy (TEM), video‐enhanced optical microscopy (VEM), and small‐angle X‐ray scattering (SAXS). A new TEM sample preparation technique was developed in which the foam is impregnated with water, frozen, and microtomed, and the polyether soft segment is selectively degraded in the electron beam. Structures of two size scales were detected. A texture with grains (“urea aggregates”) 50–200 nm in size was imaged using both VEM and low‐magnification TEM for foams with formulations containing more than 2 pphp water. For the first time, images of urea hard segment microdomains in polyurethane foam (approximately 5 nm in size) were obtained using high‐magnification TEM. A microdomain spacing of approximately 6–8 nm was estimated from the SAXS scattering profiles. Glycerol was added to one of the formulations in order to modify the urea microphase separation and to give insight into morphology development in molded polyurethane foam systems. No structure was observed in low‐magnification TEM images of the glycerol‐modified foam, although smaller structures (hard segments) were detected at high magnification and by SAXS. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 573–581, 1998
Sprache
Englisch
Identifikatoren
ISSN: 0887-6266
eISSN: 1099-0488
DOI: 10.1002/(SICI)1099-0488(199803)36:4<573::AID-POLB4>3.0.CO;2-Q
Titel-ID: cdi_crossref_primary_10_1002__SICI_1099_0488_199803_36_4_573__AID_POLB4_3_0_CO_2_Q
Format
–
Schlagworte
Applied sciences
,
block-segmented copolymers
,
Cellular
,
Exact sciences and technology
,
Forms of application and semi-finished materials
,
microphase separation
,
optical microscopy
,
polyether polyol
,
Polymer industry, paints, wood
,
polyurethane foam
,
small-angle X-ray scattering
,
Technology of polymers
,
transmission electron microscopy
Weiterführende Literatur
Empfehlungen zum selben Thema automatisch vorgeschlagen von
bX