Related Experiment Video
Updated: Sep 24, 2025

Controlled Synthesis and Fluorescence Tracking of Highly Uniform PolyN-isopropylacrylamide Microgels
Published on: September 8, 2016
Quantitative determination of the spring entropy effect and its indication of the conformational change of polymer
Li Song1, Jiaxiang Lin1, Panpan Liu1
1Department of Polymer Material Science and Engineering, Institution of Advanced Polymer Materials, School of Material Science and Engineering Tianjin University Tianjin 300350 China dhuang@tju.edu.cn.
Abstract:
The lower critical solution temperature (LCST) phase separation behaviors of thermosensitive poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions were investigated by power-compensation differential scanning calorimetry (DSC). The entropic effect and hence the change of swelling state of PNIPAM polymer coils in homogeneous concentrated aqueous solutions with varied solution composition was elucidated by the isothermal enthalpy demixing recovery behaviors in distinct concentration regions.
Related Concept Videos
Polymers: Molecular Weight Distribution
Molecular Weight of Step-Growth Polymers
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
Enthalpy of Solution
Polymer Classification: Stereospecificity

