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<p>Compared to linear analogs, hyperbranched polymers (HBPs) have gotten much attention in the last decade because of their intrinsic globular topologies and distinctive features like low viscosity, high solubility, and a high degree of functionality. In this work, four types of hyperbranched polyester polymer HBPs have been synthesized using the A2+B3 polycondensation methodology. Firstly, the starting material B3 monomer (Pyrimidine-2,4,6-triol) has been synthesized using urea and malonic acid with the presence of sodium Na as the catalyst for the reaction. Secondly, four types of materials (tartaric acid TA, adipic acid AD, maleic acid MA, and phthalic anhydride PA) as A2 monomers were added to the starting material B3 monomer in an oil bath to prepare the four types of HBP. The chemical structure of HBPs was characterized by FTIR, and <sup>1</sup>H-NMR. The molecular weight of the prepared HBPs was characterized by gel permeation chromatography GPC, and thermal properties were characterized by differential scanning calorimetry DSC and thermal gravimetric analysis TGA. FTIR results showed that there are new bands, such as C-O-C between A2 and B3 monomers, as indicated by 1H-NMR. In addition, GPC shows that the prepared polymers have a narrow molecular weight distribution with good thermal stability, as indicated by DSC and TGA.</p>
</abstract>

Compared to linear analogs, hyperbranched polymers (HBPs) have gotten much attention in the last decade because of their intrinsic globular topologies and distinctive features like low viscosity, high solubility, and a high degree of functionality. In this work, four types of hyperbranched polyester polymer HBPs have been synthesized using the A2+B3 polycondensation methodology. Firstly, the starting material B3 monomer (Pyrimidine-2,4,6-triol) has been synthesized using urea and malonic acid with the presence of sodium Na as the catalyst for the reaction. Secondly, four types of materials (tartaric acid TA, adipic acid AD, maleic acid MA, and phthalic anhydride PA) as A2 monomers were added to the starting material B3 monomer in an oil bath to prepare the four types of HBP. The chemical structure of HBPs was characterized by FTIR, and 1H-NMR. The molecular weight of the prepared HBPs was characterized by gel permeation chromatography GPC, and thermal properties were characterized by differential scanning calorimetry DSC and thermal gravimetric analysis TGA. FTIR results showed that there are new bands, such as C-O-C between A2 and B3 monomers, as indicated by 1H-NMR. In addition, GPC shows that the prepared polymers have a narrow molecular weight distribution with good thermal stability, as indicated by DSC and TGA.

Preparation and Characterization of a Novel Hyperbranched Polyester Polymers Using A2+B3 Monomers

Polymer and Petrochemical Industries Department

Department of Energy, College of Engineering

Production Engineering Archives

This work is licensed under the Creative Commons Attribution 4.0 International License.

Compared to linear analogs, hyperbranched polymers (HBPs) have gotten much attention in the last decade because of their intrinsic globular topologies and...

Preparation and Characterization of a Novel Hyperbranched Polyester Polymers Using A2+B3 Monomers

Published Online: Feb 15, 2023

Page range: 28 - 36

Received: Jul 14, 2022

Accepted: Dec 09, 2022

DOI: https://doi.org/10.30657/pea.2023.29.5

Keywords
hyperbranched polyester HBP, A2+B3 monomer, polycondensation, H-NMR, GPC

© 2023 Nabeel Hasan Al-Mutairi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Preparation and Characterization of a Novel Hyperbranched Polyester Polymers Using A2+B3 Monomers

Published Online: Feb 15, 2023

Page range: 28 - 36

Received: Jul 14, 2022

Accepted: Dec 09, 2022

DOI: https://doi.org/10.30657/pea.2023.29.5

Keywordshyperbranched polyester HBP, A2+B3 monomer, polycondensation, H-NMR, GPC

© 2023 Nabeel Hasan Al-Mutairi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
hyperbranched polyester HBP, A2+B3 monomer, polycondensation, H-NMR, GPC