NDLI: Static and dynamic swelling of grafted poly(2-alkyl-2-oxazoline)s

Please wait, while we are loading the content...

Static and dynamic swelling of grafted poly(2-alkyl-2-oxazoline)s

Content Provider	Semantic Scholar
Author	Rehfeldt, Florian Tanaka, Motomu Pagnoni, Lorena Jordan, Rainer
Copyright Year	2002
Abstract	Poly(2-methyl-2-oxazoline) (PMOX) and poly(2-ethyl-2-oxazoline) (PEOX) bearing trimethoxysilane end groups for surface coupling were synthesized and grafted onto silicon/silicon dioxide substrates. Static and dynamic hydration of these films by water vapor was quantitatively studied by ellipsometry. The static swelling behavior was analyzed by measuring the equilibrium film thickness as a function of the relative humidity to obtain quantitative force-distance curves. The disjoining pressure measures the sum of all operating forces in equilibrium with the chemical potential of the surrounding atmosphere, where the dominant forces could be determined. The hydration of polymers with different initial thickness was compared by the normalized swelling ratio p and the calculated decay constant λ*. All the measured parameters exhibited a clear dependence upon the chain length. The dynamic swelling behavior was studied by monitoring the film thickness as a function of time under an "osmotic shock", switching from dry to humid atmospheric conditions (relative humidity from ∼4% to ∼90%). The characteristic time constants were analyzed for each derivative semiquantitatively, indicating that the kinetics of the water uptake is dependent on the polymer length rather than on the side chains.
Starting Page	4908
Ending Page	4914
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1021/la0112559
Volume Number	18
Alternate Webpage(s)	https://tu-dresden.de/mn/chemie/mc/mc1/ressourcen/dateien/publikationen/download/vor-2009/Rehfeldt02.pdf?lang=en
Alternate Webpage(s)	https://doi.org/10.1021/la0112559
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

Central Library (ISO-9001:2015 Certified)
Indian Institute of Technology Kharagpur
Kharagpur, West Bengal, India | PIN - 721302

See location in the Map
03222 282435
Mail: support@ndl.gov.in

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in