Synthesis, Characterization and Structure Properties of Biobased Hybrid Copolymers Consisting of Polydiene and Polypeptide Segmentsстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 декабря 2021 г.
Аннотация:Novel hybrid materials of the PB-b-P(o-Bn-L-Tyr) and PI-b-P(o-Bn-L-Tyr) type (wherePB: 1,4/1,2-poly(butadiene), PI: 3,4/1,2/1,4-poly(isoprene) and P(o-Bn-L-Tyr): poly(ortho-benzyl-Ltyrosine))were synthesized through anionic and ring-opening polymerization under high-vacuumtechniques. All final materials were molecularly characterized through infrared spectroscopy (IR)and proton and carbon nuclear magnetic resonance (1H-NMR, 13C-NMR) in order to confirm thesuccessful synthesis and the polydiene microstructure content. The stereochemical behavior ofsecondary structures (-helices and -sheets) of the polypeptide segments combined with thedifferent polydiene microstructures was also studied. The influence of the -helices and -sheets, aswell as the polydiene chain conformations on the thermal properties (glass transition temperatures,thermal stability, - and -relaxation) of the present biobased hybrid copolymers, was investigatedthrough differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and dielectricspectroscopy (DS). The obtained morphologies in thin films for all the synthesized materials viaatomic force microscopy (AFM) indicated the formation of polypeptide fibrils in the polydiene matrix.