Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water
mPEG (monomethoxy poly(ethylene glycol))-maleic rosin copolymer was successfully prepared. The surface properties of the copolymer were investigated by surface tension and resonance scattering techniques. The critical micelle concentration (CMC) was obtained. The adsorption behaviors and the conform...
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doaj-854de12d72984fe0b1bab2513565d9dd2020-11-24T21:53:28ZengMDPI AGPolymers2073-43602017-09-0191046610.3390/polym9100466polym9100466Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in WaterJuying Zhou0Xia Zhang1Yanzhi Zhao2Haitang Xu3Pengfei Li4Hao Li5Jinyan Zhang6Qin Huang7Fuhou Lei8School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, ChinamPEG (monomethoxy poly(ethylene glycol))-maleic rosin copolymer was successfully prepared. The surface properties of the copolymer were investigated by surface tension and resonance scattering techniques. The critical micelle concentration (CMC) was obtained. The adsorption behaviors and the conformational changes of the surfactant molecules at the air-water interface were described. The adsorption amount of state 1 presented a sinusoid shape and that of state 2 presented a sigmoid with the growth of П. The free energy of adsorption is more negative than that of micellization, thus, the surfactant molecules adsorb on the surface firstly, and then form micelles after saturation adsorption. Accordingly, structural transformation and aggregation behaviors of various concentration mPEG-maleic rosin copolymers with changing temperature were explored in water. The mPEG-maleic rosin chains experienced transformation from unimers to aggregates, to contracted aggregates, to cohesive aggregates with increasing temperature when the concentration is lower than CMC. This process is almost reversible with decreasing temperature. Transformation from micelle to aggregate with increasing temperature happened when the concentration is higher than CMC. The phenomena were assessed by DLS (dynamic light scattering) and SEM (scanning electron microscopy) techniques.https://www.mdpi.com/2073-4360/9/10/466mPEG-maleic rosin copolymersurface propertystructural transformationaggregation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Juying Zhou Xia Zhang Yanzhi Zhao Haitang Xu Pengfei Li Hao Li Jinyan Zhang Qin Huang Fuhou Lei |
spellingShingle |
Juying Zhou Xia Zhang Yanzhi Zhao Haitang Xu Pengfei Li Hao Li Jinyan Zhang Qin Huang Fuhou Lei Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water Polymers mPEG-maleic rosin copolymer surface property structural transformation aggregation |
author_facet |
Juying Zhou Xia Zhang Yanzhi Zhao Haitang Xu Pengfei Li Hao Li Jinyan Zhang Qin Huang Fuhou Lei |
author_sort |
Juying Zhou |
title |
Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water |
title_short |
Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water |
title_full |
Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water |
title_fullStr |
Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water |
title_full_unstemmed |
Surface Properties and Structural Transformation Behaviors of mPEG-Maleic Rosin Copolymer in Water |
title_sort |
surface properties and structural transformation behaviors of mpeg-maleic rosin copolymer in water |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2017-09-01 |
description |
mPEG (monomethoxy poly(ethylene glycol))-maleic rosin copolymer was successfully prepared. The surface properties of the copolymer were investigated by surface tension and resonance scattering techniques. The critical micelle concentration (CMC) was obtained. The adsorption behaviors and the conformational changes of the surfactant molecules at the air-water interface were described. The adsorption amount of state 1 presented a sinusoid shape and that of state 2 presented a sigmoid with the growth of П. The free energy of adsorption is more negative than that of micellization, thus, the surfactant molecules adsorb on the surface firstly, and then form micelles after saturation adsorption. Accordingly, structural transformation and aggregation behaviors of various concentration mPEG-maleic rosin copolymers with changing temperature were explored in water. The mPEG-maleic rosin chains experienced transformation from unimers to aggregates, to contracted aggregates, to cohesive aggregates with increasing temperature when the concentration is lower than CMC. This process is almost reversible with decreasing temperature. Transformation from micelle to aggregate with increasing temperature happened when the concentration is higher than CMC. The phenomena were assessed by DLS (dynamic light scattering) and SEM (scanning electron microscopy) techniques. |
topic |
mPEG-maleic rosin copolymer surface property structural transformation aggregation |
url |
https://www.mdpi.com/2073-4360/9/10/466 |
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