Imperial College London
Alternate

Professor Theoni K. Georgiou

Faculty of Engineering, Department of Materials

Professor in Polymer Chemistry
 
 
 
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Contact

 

t.georgiou Website

 
 
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Location

 

RSM 1.05Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Constantinou:2020:10.1016/j.eurpolymj.2020.109655,
author = {Constantinou, AP and Lan, T and Carroll, DR and Georgiou, TK},
doi = {10.1016/j.eurpolymj.2020.109655},
journal = {European Polymer Journal},
title = {Tricomponent thermoresponsive polymers based on an amine-containing monomer with tuneable hydrophobicity: Effect of composition},
url = {http://dx.doi.org/10.1016/j.eurpolymj.2020.109655},
volume = {130},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In the present study, six dual-responsive ABC triblock copolymers were synthesised via group transfer polymerisation (GTP) and investigated through visual inspections in terms of their thermoresponsive behaviour. The copolymers consist of i) penta(ethylene glycol) methyl ether methacrylate (PEGMA), which is hydrophilic and thermoresponsive at high temperatures, ii) n-butyl methacrylate (BuMA) as the hydrophobic counterpart to promote self-assembly, and iii) 2-(diethylamino)ethyl methacrylate (DEAEMA), which is pH-responsive by adjusting its hydrophilicity depending on the pH. The effect of the degree of ionisation of DEAEMA units as well as the ionic strength effect on the self-assembly behaviour of the copolymers was tested via dynamic light scattering (DLS). The dissociation constants (pKa) of the amine units of DEAEMA were determined via potentiometric titrations. The thermoresponse has been primarily been investigated in means of cloud points (CPs) at various pH values in deionised water. Detailed phase diagrams were constructed for all the polymer solutions in phosphate buffered saline (PBS), with the interest being focused on the gelation area. It has been clearly proven that gelation is promoted as the content in BuMA and DEAEMA is increased. The polymer that presented the widest gelation area has been further investigated via rheology in terms of its gelation temperature, gelation time and shear-thinning properties.
AU  - Constantinou,AP
AU  - Lan,T
AU  - Carroll,DR
AU  - Georgiou,TK
DO  - 10.1016/j.eurpolymj.2020.109655
PY  - 2020///
SN  - 0014-3057
TI  - Tricomponent thermoresponsive polymers based on an amine-containing monomer with tuneable hydrophobicity: Effect of composition
T2  - European Polymer Journal
UR  - http://dx.doi.org/10.1016/j.eurpolymj.2020.109655
UR  - https://www.sciencedirect.com/science/article/pii/S0014305720300252?via%3Dihub
UR  - http://hdl.handle.net/10044/1/77824
VL  - 130
ER  -
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