Correlation of Activation Energies of Gas Diffusivity and Local Matrix Mobility in Polycarbonate/POSS Nanocomposites

Journal of Polymer Science, Part B: Polymer Physics - Tập 51 Số 22 - Trang 1593-1597 - 2013
Martin Böhning1, Ning Hao1, Andreas Schönhals1
1BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany

Tóm tắt

ABSTRACTAccording to basic phenomenological models describing the solution‐diffusion based mechanism of penetrant diffusion in dense polymers, a connection between the diffusive transport of gas molecules in a polymeric matrix and the molecular mobility of that matrix on a certain length scale is, in principle, established for a long time. However, experimental data directly showing this correlation are rare. The investigation of a series of nanocomposites based on a polyhedral oligomeric silsesquioxane (POSS) and a polycarbonate matrix allows a systematic change of the molecular mobility on a local length scale (β‐relaxation) and of the corresponding activation energy EA, both determined by broadband dielectric spectroscopy. Independently, activation energies of penetrant diffusion (ED) of these nanocomposites were determined for N2, O2, CO2, and CH4 and a clear linear correlation between the two activation energies was established for the first time. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1593–1597

Từ khóa


Tài liệu tham khảo

10.1016/0376-7388(90)80017-G

10.1039/tf9393500644

10.1063/1.1707667

10.1021/j150577a012

10.1002/pol.1964.100020234

10.1002/pol.1979.180170309

10.1016/S0376-7388(01)00777-3

10.1016/j.memsci.2009.06.005

Petropoulos J. H., 1994, Polymeric Gas Separation Membranes, 17

10.1002/1521-3919(20000701)9:6<293::AID-MATS293>3.0.CO;2-1

10.1063/1.465283

10.1063/1.466198

10.1016/S0376-7388(99)00229-X

10.1016/j.memsci.2009.03.053

10.1021/ma00136a001

Pixton M. R., 1994, Polymeric Gas Separation Membranes, 83

10.1021/ma990642a

10.1021/ma021720o

10.1021/ma301225y

10.1021/ma0203546

10.1021/ma070036c

10.1021/ma101463m

Schönhals A., 2002, Broadband Dielectric Spectroscopy, 225

10.1021/ma202127p

10.1103/PhysRevE.78.021801

Breck D. W., 1974, Zeolite Molecular Sieves, 636

10.1016/0950-4214(90)80030-O

10.1103/PhysRevE.76.011514

Matteucci S., 2006, Materials Science of Membranes

N.Hao Structure–Property Relationships of Polymer‐Based Nanocomposites with Polyhedral Oligomeric Silsesquioxanes as Nanofillers PhD-thesis TU‐Berlin Berlin2007; urn:nbn:de:kobv:83‐opus‐15922.

Thông tin
Thông tin xuất bản

Journal of Polymer Science, Part B: Polymer Physics

Tập 51 Số 22

1593-1597

Thông tin tác giả