Polymer–polymer complexes of poly(N-isopropylacrylamide) and poly(N,N-diethylacrylamide) with poly(carboxylic acids): a comparative study

• Published in: Colloid and polymer science Vol. 292; no. 2; pp. 423 - 430
• Main Authors: Ruiz-Rubio, Leire, Laza, José M., Pérez, Leyre, Rioja, Nerea, Bilbao, Elena
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2014; Springer; Springer Nature B.V
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Complex formation; Complexation; Exact sciences and technology; Food Science; Fourier transforms; Infrared; Infrared spectroscopy; Nanotechnology and Microengineering; Organic polymers; Original Contribution; Physical Chemistry; Physicochemistry of polymers; Polyacids; Polyacrylamides; Polymer Sciences; Properties and characterization; Soft and Granular Matter; Solution and gel properties; Solvents; diethylacrylamide; isopropylacrylamide; Phase separation; Poly(carboxylic acids); Poly; Interpolymer complexes; ,; Hydrogen bond; Stoichiometry; Poly(N,N-diethylacrylamide); Methacrylic acid polymer; Experimental study; Acrylamide derivative polymer; Intermolecular interaction; Polyelectrolyte; Organic solution; Poly(N-isopropylacrylamide); Acrylic acid polymer; Interpolymer; Interpolymercomplexes; Comparative study
• ISSN: 0303-402X; 1435-1536
• DOI: 10.1007/s00396-013-3086-7

In this manuscript, the complexation process between two polyacids, poly(acrylic acid) (PAA) and poly(methacrylic acid) (PMAA), and two different polyacrylamides, poly( N -isopropylacrylamide) (PNiPAm) and poly( N , N -diethylacrylamide) (PNdEAm), in organic solvents, has been studied. The influence of polymer chemical structure and the effect of polymer–solvent interactions on the complex formation in solution have been analyzed. Specific interactions were studied by Fourier transform infrared (FTIR) spectroscopy, and the composition of the obtained complexes was determined by elemental analysis. The calorimetric study of the interpolymer complexes shows a unique glass transition temperature for all systems except for PNdEAm/PMAA system in which phase separation was observed after thermal treatment.