Dynamics of ionic liquids in poly(vinyl alcohol) porous scaffold. Low field NMR study

2019 ◽  
Vol 56 ◽  
pp. 126-130 ◽  
Author(s):  
Carlos Mattea ◽  
Bulat Gizatullin ◽  
Siegfried Stapf
Keyword(s):  
Ionic Liquids ◽  
Vinyl Alcohol ◽  
Porous Scaffold ◽  
Poly Vinyl Alcohol ◽  
Low Field ◽  
Nmr Study ◽  
Low Field Nmr

scholarly journals Structure of Poly(vinyl alcohol) Cryo-Hydrogels as Studied by Proton Low-Field NMR Spectroscopy

2009 ◽  
Vol 42 (1) ◽  
pp. 263-272 ◽  
Author(s):  
J. L. Valentín ◽  
D. López ◽  
R. Hernández ◽  
C. Mijangos ◽  
K. Saalwächter
Keyword(s):  
Nmr Spectroscopy ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Low Field ◽  
Low Field Nmr

Network Structure of Swollen Iodine-Doped Poly (Vinyl Alcohol) Amorphous Domain as Characterized by Low Field NMR

Soft Matter ◽  
2021 ◽  
Author(s):  
Yahui Li ◽  
Junsheng Yang ◽  
Hong Cheng ◽  
Linkun Cai ◽  
Ke Ye ◽  
...  
Keyword(s):  
Complex Formation ◽  
Network Structure ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Low Field ◽  
Iodine Complex ◽  
Amorphous Domain ◽  
Nmr Techniques ◽  
Low Field Nmr ◽  
Lf Nmr

The network structure in the amorphous domain of swollen iodine-doped poly (vinyl alcohol) (PVA) were systematically investigated by low-field (LF) NMR techniques to reveal the PVA-iodine complex formation mechanism. Three...

scholarly journals The Synthesis of Poly(Vinyl Alcohol) Grafted with Fluorinated Protic Ionic Liquids Containing Sulfo Functional Groups

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4158
Author(s):  
Patrycja Glińska ◽  
Andrzej Wolan ◽  
Wojciech Kujawski ◽  
Edyta Rynkowska ◽  
Joanna Kujawa
Keyword(s):  
Ionic Liquids ◽  
Vinyl Alcohol ◽  
Proton Exchange ◽  
Polymer Materials ◽  
Polymerization Reaction ◽  
Poly Vinyl Alcohol ◽  
Hydroxyl Groups ◽  
Protic Ionic Liquids ◽  
Synthesis Route ◽  
Sulfo Groups

There has been an ongoing need to develop polymer materials with increased performance as proton exchange membranes (PEMs) for middle- and high-temperature fuel cells. Poly(vinyl alcohol) (PVA) is a highly hydrophilic and chemically stable polymer bearing hydroxyl groups, which can be further altered. Protic ionic liquids (proticILs) have been found to be an effective modifying polymer agent used as a proton carrier providing PEMs’ desirable proton conductivity at high temperatures and under anhydrous conditions. In this study, the novel synthesis route of PVA grafted with fluorinated protic ionic liquids bearing sulfo groups (–SO3H) was elaborated. The polymer functionalization with fluorinated proticILs was achieved by the following approaches: (i) the PVA acylation and subsequent reaction with fluorinated sultones and (ii) free-radical polymerization reaction of vinyl acetate derivatives modified with 1-methylimidazole and sultones. These modifications resulted in the PVA being chemically modified with ionic liquids of protic character. The successfully grafted PVA has been characterized using 1H, 19F, and 13C-NMR and FTIR-ATR. The presented synthesis route is a novel approach to PVA functionalization with imidazole-based fluorinated ionic liquids with sulfo groups.

Low-field NMR study of Nylon 6/silica composites

2007 ◽  
Vol 26 (4) ◽  
pp. 501-504 ◽  
Author(s):  
Mônica Preto ◽  
Maria Inês Bruno Tavares ◽  
Edemilson P. da Silva
Keyword(s):  
Nylon 6 ◽  
Low Field ◽  
Nmr Study ◽  
Low Field Nmr

Solid-State 13C NMR Study of Poly(vinyl alcohol) Gels

2002 ◽  
Vol 21 (3-4) ◽  
pp. 187-196 ◽  
Author(s):  
Simona Lai ◽  
Mariano Casu ◽  
Giuseppe Saba ◽  
Adolfo Lai ◽  
Ivan Husu ◽  
...  
Keyword(s):  
Solid State ◽  
13C Nmr ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Nmr Study ◽  
Solid State 13C Nmr
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