NMR and Thermodynamic Study of Phase Transition in Aqueous Solutions of Thermoresponsive Amphiphilic Polymer

被引：4
|
作者：
Hanykova, Lenka [1 ]
Radecki, Marek [1 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, Dept Macromol Phys, CR-18000 Prague 8, Czech Republic
来源：
CHEMISTRY LETTERS | 2012年 / 41卷 / 10期
关键词：
POLY(VINYL METHYL ETHER)/WATER; ANGLE NEUTRON-SCATTERING; COIL-GLOBULE TRANSITION; SOLVENT INTERACTIONS; ETHER)/D2O SOLUTIONS; COMPLEX-FORMATION; LIGHT-SCATTERING; METHYL-ETHER); SEPARATION; WATER;
D O I：
10.1246/cl.2012.1044
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
H-1 NMR techniques combined with differential scanning calorimetry (DSC) experiments are employed to investigate the temperature-induced phase transition in aqueous poly(vinyl methyl ether) solutions. NMR data were used to construct van't Hoff plots, and changes in the enthalpy and entropy characterizing the phase transition were determined. It follows from a comparison of NMR and DSC thermodynamic parameters (Delta H values) for solutions with c = 1-30 wt % that the size of the cooperative units (domains) undergoing the transition corresponds to the whole polymer chain.
引用
收藏
页码：1044 / 1046
页数：3
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