The Effect of Synthetic Conditions on the Free Volume of Poly(2-hydroxyethyl methacrylate) as Studied by1H NMR,129Xe NMR, and Position Annihilation Spectroscopy

2007 ◽  
pp. 391-409 ◽  
Author(s):  
Kylie M. Varcoe ◽  
Idriss Blakey ◽  
Traian V. Chirila ◽  
Anita J. Hill ◽  
Andrew K. Whittaker
Keyword(s):  
Free Volume ◽  
Hydroxyethyl Methacrylate ◽  
129Xe Nmr

129Xe NMR Investigation of the Free Volume in Dendritic and Cross-Linked Polymers

1999 ◽  
Vol 32 (6) ◽  
pp. 1897-1903 ◽  
Author(s):  
D. R. Morgan ◽  
E. O. Stejskal ◽  
A. L. Andrady
Keyword(s):  
Free Volume ◽  
129Xe Nmr

129Xe-NMR study of free volume in amorphous perfluorinated polymers: comparsion with other methods

Polymer ◽  
2003 ◽  
Vol 44 (17) ◽  
pp. 5039-5045 ◽  
Author(s):  
G. Golemme ◽  
J.B. Nagy ◽  
A. Fonseca ◽  
C. Algieri ◽  
Yu. Yampolskii
Keyword(s):  
Free Volume ◽  
129Xe Nmr ◽  
Nmr Study

Positron annihilation and 129Xe NMR studies of free volume in polymers

2000 ◽  
Vol 58 (5-6) ◽  
pp. 581-585 ◽  
Author(s):  
Bunsow Nagasaka ◽  
Taro Eguchi ◽  
Hirokazu Nakayama ◽  
Nobuo Nakamura ◽  
Yasuo Ito
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Nmr Studies ◽  
129Xe Nmr

scholarly journals On the structural origin of free volume in 1-alkyl-3-methylimidazolium ionic liquid mixtures: a SAXS and 129Xe NMR study

2019 ◽  
Vol 21 (11) ◽  
pp. 5999-6010 ◽  
Author(s):  
Cameron C. Weber ◽  
Nicholas J. Brooks ◽  
Franca Castiglione ◽  
Michele Mauri ◽  
Roberto Simonutti ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Free Volume ◽  
Alkyl Chain ◽  
Liquid Mixtures ◽  
Excess Free Volume ◽  
129Xe Nmr ◽  
Nmr Study ◽  
Chain Lengths

The structural origins of excess free volume in mixtures of ionic liquids featuring different alkyl chain lengths are identified by combining 129Xe NMR and SAXS techniques.

Effect of Redundant Chain Packing on the Uptake of Calcium Phosphate in Poly(2-Hydroxyethyl Methacrylate) Hydrogels

2007 ◽  
Vol 60 (6) ◽  
pp. 439 ◽  
Author(s):  
Traian V. Chirila ◽  
Anita J. Hill ◽  
David T. Richens
Keyword(s):  
Calcium Phosphate ◽  
Free Volume ◽  
Emission Spectroscopy ◽  
Calcium Uptake ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Hydroxyethyl Methacrylate ◽  
Chain Packing ◽  
Phosphate Ions

A method is described that allows reduction of the amount of calcium phosphate phases deposited spontaneously inside poly(2-hydroxyethyl methacrylate) (PHEMA), a hydrogel of biomedical importance. PHEMA homo-interpenetrating polymer networks (homo-IPNs) were synthesized and then treated in a calcifying solution. A reduction of calcium uptake of 58 to 75% was measured by ICP emission spectroscopy in the IPNs as compared to the PHEMA homopolymer (the parent network). The effect was rationalized in terms of reduction of the free volume available for the penetration and transport of Ca2+ and phosphate ions as a result of redundant chain packing through formation of IPNs.

Free volume of poly(perfluorosulfonic acid)/SiO2 composite proton exchange membranes by 129Xe NMR

2011 ◽  
Vol 506 (1-3) ◽  
pp. 71-75 ◽  
Author(s):  
Lavinia Utiu ◽  
Carmen Filipoi ◽  
Dan E. Demco ◽  
Xiaomin Zhu ◽  
Rostislav Vinokur ◽  
...  
Keyword(s):  
Free Volume ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Perfluorosulfonic Acid ◽  
129Xe Nmr

FREE VOLUME CHANGE OF METALLIC GLASSES STUDIED BY THERMAL EXPANSION MEASUREMENTS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-875-C8-877
Author(s):  
E. Girt ◽  
P. Tomić ◽  
A. Kuršumović ◽  
T. Mihać-Kosanović
Keyword(s):  
Thermal Expansion ◽  
Free Volume ◽  
Volume Change ◽  
Metallic Glasses

Survey of Relations of Chemical Constituents in Polymer-Based Materials with Brittleness and its Associated Properties

2016 ◽  
Vol 10 (4s) ◽  
pp. 595-600 ◽  
Author(s):  
Witold Brostow ◽  
◽  
Haley E. Hagg Lobland ◽  
Keyword(s):  
Chemical Composition ◽  
Impact Strength ◽  
Free Volume ◽  
Chemical Constituents ◽  
Polymer Processing ◽  
Brittle Behavior ◽  
Composition And Structure ◽  
Common Thread

The property of brittleness for polymers and polymer-based materials (PBMs) is an important factor in determining the potential uses of a material. Brittleness of polymers may also impact the ease and modes of polymer processing, thereby affecting economy of production. Brittleness of PBMs can be correlated with certain other properties and features of polymers; to name a few, connections to free volume, impact strength, and scratch recovery have been explored. A common thread among all such properties is their relationship to chemical composition and morphology. Through a survey of existing literature on polymer brittleness specifically combined with relevant reports that connect additional materials and properties to that of brittleness, it is possible to identify chemical features of PBMs that are connected with observable brittle behavior. Relations so identified between chemical composition and structure of PBMs and brittleness are described herein, advancing knowledge and improving the capacity to design new and to choose among existing polymers in order to obtain materials with particular property profiles.

Parameters of the free volume theory in glasses with trigonal local coordination

2001 ◽  
Vol 10 (0) ◽  
pp. 147-151
Author(s):  
Т. М. Мельниченко ◽  
Т. Д. Мельниченко ◽  
Я. Я. Коцак ◽  
Я. П. Куценко ◽  
П. П. Пуга
Keyword(s):  
Free Volume ◽  
Free Volume Theory ◽  
Local Coordination
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