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Functionalization of montmorillonite by acrylamide polymers containing side‐chain ammonium cations
Author(s) -
Biasci Luca,
Aglietto Mauro,
Ruggeri Giacomo,
D′Alessio Aldo
Publication year - 1995
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1995.220061004
Subject(s) - thermogravimetric analysis , montmorillonite , polymer , thermal stability , materials science , polymer chemistry , copolymer , organoclay , fourier transform infrared spectroscopy , differential scanning calorimetry , polyelectrolyte , polyacrylamide , lamellar structure , chemical engineering , composite material , physics , engineering , thermodynamics
Stable polyacrylamide (polyAA)–montmorillonite adducts were prepared by two distinct processes: (1) free radical copolymerization of AA with alkaline clay previously treated with 2‐(N‐methyl‐N,N‐diethyl ammonium iodide)ethylacrylate (QD1) and (2) direct interactions of alkaline montmorillonite with various preformed copolymers of AA with QD1. The structure of the adducts as determined by Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry and X‐ray diffraction was shown to consist of AA macromolecules inserted between lamellar layers whose spacing was larger than in the polymer‐free clay. The polymer was strongly attached to the inorganic surfaces, probably due to cooperative formation of electrostatic bonding. The thermal stability of the organic polymers in the resulting complexes was substantially enhanced while the mobility of macromolecules decreased.