Phase Separation in Aqueous Polymer Solutions as Studied by NMR Methods

2005 ◽  
Vol 222 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Ji?� Sp?v�?ek
Keyword(s):  
Phase Separation ◽  
Polymer Solutions ◽  
Aqueous Polymer ◽  
Nmr Methods

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.

scholarly journals Viscoelastic phase separation model for ternary polymer solutions

2021 ◽  
Vol 154 (10) ◽  
pp. 104903
Author(s):  
Kenji Yoshimoto ◽  
Takashi Taniguchi
Keyword(s):  
Phase Separation ◽  
Polymer Solutions ◽  
Ternary Polymer ◽  
Separation Model
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