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

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.

The Biodegradation and the Rheological Properties of Polypropylene/Hyperbranched Polyester Blends for Industrial Applications

“…VPP and rPP were purchased from sabic (KSA), and used as the major phase for the preparation of polymeric blends. A novel Hyperbranched polyester polymers HBPs (HBP-TA, HBP-AD, HBP-MA, and HBP-PA) were synthesized by polycondensation polymerization in our laboratory (polymer department/Babylon University) according our previous works [13] and [14]. Table 1 shows the properties of VPP and rPP.…”

A Theoretical Investigation of the Polyaddition of an AB2+A2+B4 Monomer Mixture

“…This poses a notable barrier to the practical application of HBPs that are obtained through the aforementioned methods. For this reason, co-polyaddition of monomer mixtures of different types, for example, A2+B3, A2+B4, etc., have found wider application [19][20][21][22][23][24][25][26][27][28] (Scheme 1). Scheme 1.…”

“…To describe the polyaddition of A2+CB2 Scheme 1. Synthesis of HBP by polyaddition of the monomer types A 2 +B 3 [23][24][25], A 2 +B 4 [26][27][28], A 2 +CB 2 [29][30][31], and A 2 +B B 2 [32][33][34].…”