Surface characterizations of spin-coated films of ethylcellulose and hydroxypropyl methylcellulose blends

Films of pure ethylcellulose (EC) and hydroxypropyl methylcellulose (HPMC) polymers and EC/HPMC blends were prepared from solutions by spin coating where isopropyl alcohol (IPA), water, and IPA/water cosolvent were used as solvents. Surface structures of the films were investigated using optical mic...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 23(2007), 8 vom: 10. Apr., Seite 4286-92
1. Verfasser: Lua, Yit-Yian (VerfasserIn)
Weitere Verfasser: Cao, Xiaoping, Rohrs, Brian R, Aldrich, D Scott
Format: Aufsatz
Sprache:English
Veröffentlicht: 2007
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Membranes, Artificial Polymers Solvents Hypromellose Derivatives 3NXW29V3WO ethyl cellulose 7Z8S9VYZ4B Cellulose 9004-34-6 mehr... Methylcellulose 9004-67-5
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520 |a Films of pure ethylcellulose (EC) and hydroxypropyl methylcellulose (HPMC) polymers and EC/HPMC blends were prepared from solutions by spin coating where isopropyl alcohol (IPA), water, and IPA/water cosolvent were used as solvents. Surface structures of the films were investigated using optical microscopy, atomic force microscopy (AFM), and Raman mapping and spectroscopy. For the films prepared from EC/HPMC blend solutions using the IPA/water cosolvent, different domain structures such as islands or pits and phase separation between EC and HPMC were observed by optical microscopy and AFM. The nature of the polymer components on the surface of the films was identified by Raman mapping and spectroscopy. Experimental results also indicated that polymer composition, solvent, and temperature during spin coating had significant impacts on surface structures of the films 
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700 1 |a Rohrs, Brian R  |e verfasserin  |4 aut 
700 1 |a Aldrich, D Scott  |e verfasserin  |4 aut 
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