Detection of poly(ethylene glycol) residues from nonionic surfactants in surface water by proton and carbon-13 nuclear magnetic resonance spectrometry

1991 ◽  
Vol 25 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Jerry A. Leenheer ◽  
R. L. Wershaw ◽  
P. A. Brown ◽  
T. I. Noyes
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Surface Water ◽  
Magnetic Resonance ◽  
Ethylene Glycol ◽  
Nonionic Surfactants ◽  
Poly Ethylene Glycol ◽  
Nuclear Magnetic Resonance Spectrometry ◽  
Magnetic Resonance Spectrometry ◽  
Poly Ethylene ◽  
Nuclear Magnetic

13C/7Li Solid-State Nuclear Magnetic Resonance Study on Poly(Ethylene Glycol)-Poly(Propylene Glycol)-Poly(Ethylene Glycol)/LiCF3SO3 Copolymer Electrolytes

2020 ◽  
Vol 982 ◽  
pp. 26-33
Author(s):  
Ling Wei ◽  
Da Wei Li
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Ethylene Glycol ◽  
Phase Structure ◽  
Poly Ethylene Glycol ◽  
Chain Dynamics ◽  
Poly Ethylene ◽  
Nuclear Magnetic

Solid-state high-resolution 13C/7Li nuclear magnetic resonance (NMR) study was performed on the phase structure and chain dynamics of PEG-PPG-PEGn/LiCF3SO3 (n=3, 6, 12) copolymer electrolytes. PEG repeating units and Li+ form PEG3:LiCF3SO3 crystalline complex and PE3/Li+ amorphous complex in all the samples. PPG repeating units and Li+ form different complexes with respect to O:Li+ feed ratio (denoted as PP/Li+-3/6/12). The 13C chemical shifts and half widths of the signals from PP/Li+-3/6/12 remain unchanged, which implies the structures of PP/Li+-3/6/12 are similar at least in a very short range. The half width of the 7Li signals from PP/Li+-3/6/12 becomes narrower and narrower as the Li+ concentration decreases. This indicates the chain mobility of the amorphous phase increases with the decrease of ionic concentration. Moreover, neat crystalline PEG, neat amorphous PEG and neat amorphous PPG start to appear when O:Li+ is greater than 3:1 and their contents increase with the increase of O:Li+. Overall, solid-state high-resolution NMR is a powerful and unique method for understanding the phase structure and chain dynamics of solid polymer electrolytes (SPEs), more applications of this technique to studies on SPEs is expecting.

Investigation of the interaction between poly(ethylene glycol) and protein molecules using low field nuclear magnetic resonance

2013 ◽  
Vol 9 (5) ◽  
pp. 6414-6420 ◽  
Author(s):  
Jiang Wu ◽  
Zhen Wang ◽  
Weifeng Lin ◽  
Shengfu Chen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Low Field ◽  
Protein Molecules ◽  
Poly Ethylene ◽  
Nuclear Magnetic

Nuclear magnetic resonance study of drawn poly(ethylene glycol)

1968 ◽  
Vol 6 (3) ◽  
pp. 653-656 ◽  
Author(s):  
Kunio Hikichi ◽  
Toshiyuki Shibata ◽  
Akihiro Tsutsumi ◽  
Jiro Furuichi
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ethylene Glycol ◽  
Nuclear Magnetic Resonance Study ◽  
Poly Ethylene Glycol ◽  
Magnetic Resonance Study ◽  
Poly Ethylene ◽  
Nuclear Magnetic

Nuclear magnetic resonance spectrometry

1986 ◽  
Vol 58 (5) ◽  
pp. 315-321 ◽  
Author(s):  
John R. Wasson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectrometry ◽  
Magnetic Resonance Spectrometry ◽  
Nuclear Magnetic

Reactions of butadiene in zeolite catalysts by in situ variable-temperature solid-state nuclear magnetic resonance spectrometry

1990 ◽  
Vol 112 (8) ◽  
pp. 2886-2891 ◽  
Author(s):  
Benny R. Richardson ◽  
Noel D. Lazo ◽  
Paul D. Schettler ◽  
Jeffery L. White ◽  
James F. Haw
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Variable Temperature ◽  
Zeolite Catalysts ◽  
Nuclear Magnetic Resonance Spectrometry ◽  
Magnetic Resonance Spectrometry ◽  
Nuclear Magnetic
Sign in / Sign up

Export Citation Format

Share Document