The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions

The acrylamide (AM)/methacryloyl ethyl sulfobetaine (SPE)/behenyl polyoxyethylene ether methacrylate (BEM) terpolymer (PASB) was synthesized by soap-free emulsion polymerization. Four types of PASBs were synthesized by adjusting the moles of AM and BEM with constant total moles of monomers. The synt...

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Autores principales:	Xiaotong Zhang, Gen Li, Yuhao Chen, Keliang Wang, Erlong Yang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	copolymer associative emulsion instability multiple light scattering Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/6a8ce52ddbca438aa43d9d7b2f52bd61
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spelling	oai:doaj.org-article:6a8ce52ddbca438aa43d9d7b2f52bd612021-11-25T18:49:37ZThe Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions10.3390/polym132240412073-4360https://doaj.org/article/6a8ce52ddbca438aa43d9d7b2f52bd612021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/4041https://doaj.org/toc/2073-4360The acrylamide (AM)/methacryloyl ethyl sulfobetaine (SPE)/behenyl polyoxyethylene ether methacrylate (BEM) terpolymer (PASB) was synthesized by soap-free emulsion polymerization. Four types of PASBs were synthesized by adjusting the moles of AM and BEM with constant total moles of monomers. The synthesized copolymers were characterized by Fourier-transform infrared spectroscopy, thermogravimetry, molecular weight, and viscosity. By measuring the microscopic morphology and backscattered light intensity of the emulsions, the instability process of the emulsions prepared by PASBs was investigated in detail. The main instability processes of the emulsions prepared from PASBs within 45 min were flocculation and coalescence. The intermolecular association of copolymer PASBs was dominated by the behenyl functional groups on the molecular chains. The stability of the emulsions, which were prepared from isoviscosity aqueous solutions controlled by the concentration of the associative copolymers, was increased with the degree of association of copolymers. The hydrophobic association between the copolymer molecules can further slow down the flocculation and coalescence of the emulsion droplets on the basis of the same aqueous solution viscosity, which is one of the reasons for improving the stability of the emulsion.Xiaotong ZhangGen LiYuhao ChenKeliang WangErlong YangMDPI AGarticlecopolymerassociativeemulsion instabilitymultiple light scatteringOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 4041, p 4041 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	copolymer associative emulsion instability multiple light scattering Organic chemistry QD241-441
spellingShingle	copolymer associative emulsion instability multiple light scattering Organic chemistry QD241-441 Xiaotong Zhang Gen Li Yuhao Chen Keliang Wang Erlong Yang The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions
description	The acrylamide (AM)/methacryloyl ethyl sulfobetaine (SPE)/behenyl polyoxyethylene ether methacrylate (BEM) terpolymer (PASB) was synthesized by soap-free emulsion polymerization. Four types of PASBs were synthesized by adjusting the moles of AM and BEM with constant total moles of monomers. The synthesized copolymers were characterized by Fourier-transform infrared spectroscopy, thermogravimetry, molecular weight, and viscosity. By measuring the microscopic morphology and backscattered light intensity of the emulsions, the instability process of the emulsions prepared by PASBs was investigated in detail. The main instability processes of the emulsions prepared from PASBs within 45 min were flocculation and coalescence. The intermolecular association of copolymer PASBs was dominated by the behenyl functional groups on the molecular chains. The stability of the emulsions, which were prepared from isoviscosity aqueous solutions controlled by the concentration of the associative copolymers, was increased with the degree of association of copolymers. The hydrophobic association between the copolymer molecules can further slow down the flocculation and coalescence of the emulsion droplets on the basis of the same aqueous solution viscosity, which is one of the reasons for improving the stability of the emulsion.
format	article
author	Xiaotong Zhang Gen Li Yuhao Chen Keliang Wang Erlong Yang
author_facet	Xiaotong Zhang Gen Li Yuhao Chen Keliang Wang Erlong Yang
author_sort	Xiaotong Zhang
title	The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions
title_short	The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions
title_full	The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions
title_fullStr	The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions
title_full_unstemmed	The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions
title_sort	synthesis of associative copolymers with both amphoteric and hydrophobic groups and the effect of the degree of association on the instability of emulsions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6a8ce52ddbca438aa43d9d7b2f52bd61
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The Synthesis of Associative Copolymers with Both Amphoteric and Hydrophobic Groups and the Effect of the Degree of Association on the Instability of Emulsions

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