Block copolymers containing polyacrylamide and polyacrylic acid: Bulk structure and hydrogen bonds system. (2nd January 2017)

• Record Type: Journal Article
• Authors: Kunitskaya, L.; Zheltonozhskaya, T.; Destarac, M.; Mazieres, S.
• Is Part Of: Molecular crystals and liquid crystals. Volume 642(2017)
• Page Start: 89
• Page End: 98
• Publication Date: 2017-01-02
• Subjects: polyacrylamide -- poly(acrylic acid) -- block copolymer -- intramolecular polycomplex; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2016.1255522
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: Asymmetric block copolymers PAAc- b -PAAm (DBCs) and PAAm- b -PAAc- b -PAAm (TBCs) comprised poly(acrylic acid) blocks of constant chain length and polyacrylamide blocks of variable chain length were synthesized using RAFT/MADIX technique. Their properties in a bulk state were studied by differential scanning calorimetry and the hydrogen bond system was investigated by Fourier transform infrared spectroscopy. It was found that DBCs and TBCs possess a homogeneous amorphous structure, whose temperatures of glass transition and destruction beginning increased with growth of PAAm block length. The H-bond system between PAAc and PAAm blocks was most developed in TBC sample and formed manly by the mixed cyclic dimmers of carboxyl and amide groups.