Synthesis of low-molecular weight itaconic acid polymers as nanoclay dispersants and dispersion stabilizers

0565807 - ÚMCH 2024 RIV GB eng J - Journal Article
Bednarz, S. - Bujok, Sonia - Mielczarek, K. - Świergosz, T. - Wierzbicki, S. - Konefal, Rafal - Konefal, Magdalena - Nevoralová, Martina - Pavlova, Ewa - Beneš, Hynek
Synthesis of low-molecular weight itaconic acid polymers as nanoclay dispersants and dispersion stabilizers.
Polymer. Roč. 265, 16 January (2023), č. článku 125614. ISSN 0032-3861. E-ISSN 1873-2291
R&D Projects: GA ČR(CZ) GF21-07004K
Institutional support: RVO:61389013
Keywords : polyelectrolyte synthesis * renewable polymer * clay dispersant
OECD category: Polymer science
Impact factor: 4.6, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0032386122011028?via%3Dihub

Itaconic oligomers with an average molecular weight of Mn = 1500–2200 g/mol and different end-groups were prepared by 2,2′-azobis(2-methyl-propionamidine) dihydrochloride (V-50) – induced radical polymerization of itaconic acid (IA) in aqueous solution at 65 °C for 24 h. Mercaptoethanol, thioglycerol, and sodium hypophosphite were used as chain transfer agents (CTA) with the molar ratio ranging from 30:3:1 to 30:3:4 of IA, V50, and CTA, respectively. The structure of the oligomers was confirmed by electrospray ionization mass spectrometry (ESI-MS) and tandem mass spectrometry (ESI-MS/MS). The excellent dispersing efficiency of the oligomers at very low concentrations for Laponite® sols was proved by oscillatory rheology and small-angle X-ray scattering (SAXS) measurements.
Permanent Link: https://hdl.handle.net/11104/0337413