Journal
POLYMER
Volume 57, Issue -, Pages 173-182Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2014.12.013
Keywords
LCST; DSC; Cryo-TEM
Categories
Funding
- Ile-de-France region
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In this article, we study the temperature-induced phase transition of aqueous solutions of tailor-made Dawson polyoxometalate-poly(N,N-diethylacrylamide) hybrids (POM-PDEAAm) by means of differential scanning calorimetry, dynamic light scattering and cryo-TEM microscopy. Generally, the typical thermoresponsive aggregation of the PDEAAm in water was transferred to the hybrids. The organization of the compounds in solution below and above the transition temperature was studied, and precious insights in the aggregation mechanisms were obtained. The impact of the polymer chain-ends, the nature of the counterions of the negatively charged POM subunits and the weight fraction of the POM was elucidated, revealing a strong influence of the POM's counter-ions. Temperature and nature of the cations are thus two external factors that can be used to control the properties of the conjugates. (C) 2014 Elsevier Ltd. All rights reserved.
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