Polysuccinimide and its derivatives: Degradable and water soluble polymers (review)

Hydrogels Based on Poly(aspartic acid): Synthesis and Applications

“…The reactions catalyzed by phosphoric acid yield linear chain whereas uncatalyzed reactions lead to branching (Wolk et al, 1994). High temperature, high catalyst, and aspartic acid monomer concentration can significantly increase molecular weight (Mw) (Jalalvandi and Shavandi, 2018; Yavvari et al, 2019). Recent studies have also shown when phosphoric acid is utilized as both catalyst and polymerization media (aspartic acid monomer: phosphoric acid, 1:1), PASP with high Mw and reaction yield is achieved (Zakharchenko et al, 2011; Moon et al, 2013; Szilágyi et al, 2017).…”

High-temperature resistant water-soluble polymers derived from exotic amino acids

“…Water-soluble polymers have been widely used in water-related application as dispersants, aggregation agents, thickeners, moisturizers, binders and hydrogels. [1][2][3][4][5] The majority of these materials are polysaccharides and their derivatives, proteins, or peptides, which can be used for biological applications. [6][7][8] In addition to natural polymers, synthetic water-soluble polymers such as poly(ethylene oxide), poly(vinyl alcohol), polyacrylates, polyacrylamide and their derivatives have been employed in various industries.…”

“…10,11 However, the heat resistance of conventional water soluble polymers remain too poor for advanced industries that require high thermal stability while processing under harsh conditions. 3,5 On the contrary, polymers possessing ultrahigh thermal stability, such as polyimides, exhibits poor solubility features. Especially, no effective molecular engineering design system exists for optimizing the water solubility features of polyimides due to their rigid polymer backbone and strong interchain interactions; thereby limits their processability, functionalization and subsequently applications as well.…”

Synthesis of Oligosuccinimide and Evaluation of Its Corrosion Inhibition Performance on Carbon Steel in CO2-Saturated 1% NaCl Solution

“…Polysuccinimide (PSI) is a N-heterocyclic biopolymer and is known as an intermediate compound of polyaspartic acid (PASP). Both of them are nontoxic and biodegradable polymers [12,13], however, only PASP is used widely as a non-phosphorous, antiscalant and a corrosion inhibitor due to its watersoluble property, good dispersion capacity and its ability as a chelating agent that can reduce the corrosion rate and prevent the deposition of calcium carbonate, calcium phosphate and calcium sulfate on the pipeline [12][13][14][15]. The structure of PSI and PASP are displayed in Figure 1.…”

“…The presence of carboxylic and amide groups in PASP's molecular structure can protect carbon steel from corrosion attacks. Meanwhile, PSI is soluble only in organic solvents such as dimethylformamide (DMF), which cause a risk of environmental damage [15]. The water insolubility is a crucial limitation of PSI for some applications, in particular as a corrosion inhibitor.…”