Effect of time on the hydration and temperature-induced phase separation in aqueous polymer solutions. 1H NMR study

Polymer ◽  
2006 ◽  
Vol 47 (21) ◽  
pp. 7329-7334 ◽  
Author(s):  
Larisa Starovoytova ◽  
Jiří Spěváček
Keyword(s):  
Phase Separation ◽  
1H Nmr ◽  
Polymer Solutions ◽  
Aqueous Polymer ◽  
Nmr Study

Novel porphyrin-labelled poly(N-isopropylacrylamides): syntheses from bromoalkyl-containing prepolymers and physicochemical properties

2000 ◽  
Vol 04 (06) ◽  
pp. 579-587 ◽  
Author(s):  
YURI S. AVLASEVICH ◽  
TIMOUR A. CHEVTCHOUK ◽  
VALERY N. KNYUKSHTO ◽  
OLEG G. KULINKOVICH ◽  
KONSTANTIN N. SOLOVYOV
Keyword(s):  
Phase Transition ◽  
Phase Separation ◽  
Physicochemical Properties ◽  
Absorption Spectra ◽  
Polymer Solutions ◽  
Soret Band ◽  
Water Soluble ◽  
Absorption Bands ◽  
Aqueous Polymer ◽  
Peak Intensity

Novel water-soluble tetraarylporphyrin-labelled polymers have been synthesized by the reaction of bromoalkyl-containing poly(N-isopropylacrylamides) with 5-(4-pyridyl)-10,15,20-tri(4-methoxyphenyl) porphyrin. Corresponding Zn -porphyrin-containing polymers have also been prepared. Phase transition diagrams show that aqueous polymer solutions exhibit phase separation upon heating. Absorption spectra of the porphyrin-labelled polymers have been recorded in water and organic solvents. It is found that the absorption bands in aqueous polymer solutions are broadened and shifted bathochromically, the peak intensity of the Soret band in the polymer spectra being strongly lowered in water. Fluorescence properties of the polymers are briefly reported.

1H NMR study of the phase separation and the behavior of hydrogen in Ti1−yVyHx

1983 ◽  
Vol 78 (8) ◽  
pp. 5096-5102 ◽  
Author(s):  
Shigenobu Hayashi ◽  
Kikuko Hayamizu ◽  
Osamu Yamamoto
Keyword(s):  
Phase Separation ◽  
1H Nmr ◽  
Nmr Study

1H NMR study of temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers

2010 ◽  
Vol 46 (6) ◽  
pp. 1299-1306 ◽  
Author(s):  
Hana Kouřilová ◽  
Julie Šťastná ◽  
Lenka Hanyková ◽  
Zdeňka Sedláková ◽  
Jiří Spěváček
Keyword(s):  
Phase Separation ◽  
1H Nmr ◽  
Nmr Study ◽  
Acrylamide Copolymers
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