Superabsorbent polymer with enhanced gel strength and heat resistance using itaconic acid-based oligomer

Abstract

The preparation of an itaconic acid-based oligomer and its polymerization with acrylic acid via aqueous solution copolymerization are described herein for application as novel superabsorbent polymers (SAPs). The structure of the SAP is characterized using Fourier transform infrared (FT-IR) spectroscopy. In addition, the absorption properties of the SAPs with various oligomer contents and degrees of monomer neutralization are evaluated by measuring the free absorbency, centrifuge retention capacity (CRC), and absorbency under load (AUL) in 0.9 wt% saline solution. Further, the gel strengths and thermal stabilities are examined via rheological thermo gravimetric analyses. The results demonstrate that the introduction of the IA-based oligomer into the SAP network is improves the AUL, gel strength, and thermal stability of the SAP. We found the best performance of an SAP using IA-based oligomer with a CRC of 36.7 and AUL of 22.7 g/g. © 2023 The Authors. Polymers for Advanced Technologies published by John Wiley & Sons Ltd.