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Study on the mechanism and properties of new polyacrylamide emulsion polymerization with ester as continuous phase

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Abstract

Emulsion polymerization is an effective means of synthesizing high-molecular-weight polymers in order to reduce the consumption of fossil energy. This paper adopts isoamyl octanoate to replace white oil as the continuous phase of emulsion polymerization to synthesize the high molecular weight polyacrylamide emulsion RSE. S-80 and T-80 were chosen as the emulsifiers, and the test results showed that the HLB value is 5.72 when S-80/T-80 is 6.5. When S-80/T-80 is 6.5, the HLB value is 5.72. Water and isoamyl octanoate can produce ultra-low interfacial tension and stable arrangement in the interfacial membrane to form a stable emulsion, and the particle size is uniformly distributed in a normal manner. The test of the exothermic process of polymerization shows that the emulsion can be stabilized into nuclei, and polyacrylamide polymers with a molar mass of more than 18 million are obtained. The microstructure test observes that RSE molecules are in an aggregated state in the aqueous solution. A three-dimensional spatial network structure is formed, and the polymerization can be stabilized in a three-dimensional network structure after 120 °C, 170 s−1 shear, which still has good stability. After the variable shear performance test proved that the aqueous solution of RSE belongs to the typical non-Newtonian fluids, to shock test the viscoelasticity of different concentrations of RSE polymer, G′ > G″, the RSE solution to elasticity is dominant. In this paper, the capacity to form stable emulsions of isoamyl octanoate in the emulsion polymerization process is investigated to provide a basis for seeking the selection of a continuous phase with little environmental pollution and high functionality.

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Funding

This research was supported by the Service Program for Foreign Experts of Shaanxi Province of China (grant no. 2023WGZJ-ZD-03), Key R&D Program of Shaanxi Province (grant no. 2023-YBGY-307), Industrialization Project of Shaanxi Provincial Education Department (grant no. 23JC008, 21JC005), and Science and Technology Program of **’an, China (grant no. 22GXFW0014). The funding agencies had no role in the study design, collection, analysis, interpretation of data, report writing, and the decision to submit the article for publication.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, **’an, 710021, Shaanxi, China

    **n Wen, Lei Wang, **ao-juan Lai, Gui-ru Liu, Wen-wen Yang, **-hao Gao & Ya-meng Liu

  2. Shaanxi Agricultural Products Processing Technology Research Institute, **’an, 710021, Shaanxi, China

    Lei Wang

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Contributions

XW: conceptualization, data curation, and roles/writing—original draft; LW: funding acquisition and methodology; X-jL: investigation and project administration; G-rL: software, W-wY: supervision; J-hG: validation, visualization, and formal analysis; Y-mL: writing—review and editing.

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Correspondence to Lei Wang.

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Wen, X., Wang, L., Lai, Xj. et al. Study on the mechanism and properties of new polyacrylamide emulsion polymerization with ester as continuous phase. Colloid Polym Sci 302, 573–584 (2024). https://doi.org/10.1007/s00396-023-05205-y

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