Micropore Analysis of Polymer Networks by Gas Sorption and129Xe NMR Spectroscopy: Toward a Better Understanding of Intrinsic Microporosity

Langmuir ◽  
2010 ◽  
Vol 26 (19) ◽  
pp. 15650-15656 ◽  
Author(s):  
Jens Weber ◽  
Johannes Schmidt ◽  
Arne Thomas ◽  
Winfried Böhlmann
Keyword(s):  
Nmr Spectroscopy ◽  
Polymer Networks ◽  
Gas Sorption ◽  
Intrinsic Microporosity ◽  
Micropore Analysis

scholarly journals Chemical modification of the polymer of intrinsic microporosity PIM-1 for enhanced hydrogen storage

Adsorption ◽  
2020 ◽  
Vol 26 (7) ◽  
pp. 1083-1091
Author(s):  
Mi Tian ◽  
Sébastien Rochat ◽  
Hamish Fawcett ◽  
Andrew D. Burrows ◽  
Christopher R. Bowen ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Hydrogen Adsorption ◽  
Sorption Properties ◽  
Bet Surface Area ◽  
Polymer Modification ◽  
Gas Sorption ◽  
Chemically Modified ◽  
Polymer Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

Abstract A detailed investigation has been carried out of the pre-polymerisation modification of the polymer of intrinsic microporosity PIM-1 by the addition of two methyl (Me) groups to its spirobisindane unit to create a new chemically modified PIM-1 analogue, termed MePIM. Our work explores the effects of this modification on the porosity of PIM-1 and hence on its gas sorption properties. MePIM was successfully synthesised using either low (338 K) or high (423 K) temperature syntheses. It was observed that introduction of methyl groups to the spirobisindane part of PIM-1 generates additional microporous spaces, which significantly increases both surface area and hydrogen storage capacity. The BET surface area (N2 at 77 K) was increased by ~ 12.5%, resulting in a ~ 25% increase of hydrogen adsorption after modification. MePIM also maintains the advantages of good processability and thermal stability. This work provides new insights on a facile polymer modification that enables enhanced gas sorption properties.

Ionic π-Conjugated Polymer Networks by Catalyst-Free Polymerization, Photoluminescence and Gas Sorption Behavior

2016 ◽  
Vol 217 (17) ◽  
pp. 1886-1898 ◽  
Author(s):  
Tomáš Faukner ◽  
Arnošt Zukal ◽  
Jiří Brus ◽  
Jiří Zedník ◽  
Jan Sedláček
Keyword(s):  
Conjugated Polymer ◽  
Polymer Networks ◽  
Sorption Behavior ◽  
Gas Sorption ◽  
Catalyst Free

A structural study of silicon-based interpenetrating polymer networks by solid state 1H and 13C NMR spectroscopy

2002 ◽  
Vol 602-603 ◽  
pp. 321-333 ◽  
Author(s):  
Masatoshi Kobayashi ◽  
Shigeki Kuroki ◽  
Isao Ando ◽  
Kazuo Yamauchi ◽  
Hideaki Kimura ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Study ◽  
13C Nmr ◽  
Polymer Networks ◽  
13C Nmr Spectroscopy ◽  
Interpenetrating Polymer Networks ◽  
1H And 13C Nmr ◽  
Silicon Based

Knowledge-based Approach to Gas Sorption in Glassy Polymers by Combining Experimental and Molecular Simulation Techniques

2008 ◽  
Vol 1130 ◽  
Author(s):  
Matthias Heuchel ◽  
Ole Hölck ◽  
Martin Böhning ◽  
Martin R. Siegert ◽  
Dieter Hofmann
Keyword(s):  
Molecular Dynamics ◽  
Polymer Matrix ◽  
Glassy Polymers ◽  
Gas Sorption ◽  
Reasonable Time ◽  
Knowledge Based ◽  
Simulation Techniques ◽  
Polymer Of Intrinsic Microporosity ◽  
Complex Polymers ◽  
Intrinsic Microporosity

AbstractWe present a method which allows to calculate gas sorption in complex polymers where, as slow processes, gas induced plasticization and volume dilation are important factors. Since the relaxational swelling of the polymer matrix that is observed at elevated gas concentrations takes hours or days, the swelling process is orders of magnitudes too slow to simulate the respective molecular dynamics in reasonable time and effort. To address this apparent incompatibility of experiment and simulation, we use single representative reference states from experiment and construct atomistic packing models according to these specifications. Gas sorption of CO2 and CH4 was successfully calculated on polysulfone, a 6FDA-polyimide, and a polymer of intrinsic microporosity, PIM-1, at 308 K and pressures up to 50 bar.

scholarly journals Polymer Networks Synthesized from Poly(Sorbitol Adipate) and Functionalized Poly(Ethylene Glycol)

Gels ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 22
Author(s):  
Haroon Rashid ◽  
Yury Golitsyn ◽  
Muhammad Humayun Bilal ◽  
Karsten Mäder ◽  
Detlef Reichert ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Ethylene Glycol ◽  
Polymer Networks ◽  
Coupling Constants ◽  
Cross Linking ◽  
Magic Angle ◽  
Poly Ethylene Glycol ◽  
Component Structure ◽  
Degree Of Swelling ◽  
Poly Ethylene

Polymer networks were prepared by Steglich esterification using poly(sorbitol adipate) (PSA) and poly(sorbitol adipate)-graft-poly(ethylene glycol) mono methyl ether (PSA-g-mPEG12) copolymer. Utilizing multi-hydroxyl functionalities of PSA, poly(ethylene glycol) (PEG) was first grafted onto a PSA backbone. Then the cross-linking of PSA or PSA-g-mPEG12 was carried out with disuccinyl PEG of different molar masses (Suc-PEGn-Suc). Polymers were characterized through nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography (GPC), and differential scanning calorimetry (DSC). The degree of swelling of networks was investigated through water (D2O) uptake studies, while for detailed examination of their structural dynamics, networks were studied using 13C magic angle spinning NMR (13C MAS NMR) spectroscopy, 1H double quantum NMR (1H DQ NMR) spectroscopy, and 1H pulsed field gradient NMR (1H PFG NMR) spectroscopy. These solid state NMR results revealed that the networks were composed of a two component structure, having different dipolar coupling constants. The diffusion of solvent molecules depended on the degree of swelling that was imparted to the network by the varying chain length of the PEG based cross-linking agent.

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