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The crystal structure and phase transition behavior of poly(nonamethylene terephthalamide) (PA9T, -[CO-C6H4-CONH-(CH2)9-NH]n-) and its related model compounds (ATm,C6H5-CONH-(CH2)m-NHCO-C6H5 (m = 7–12)) have been investigated by carrying out the temperature dependent measurements of wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS) and infrared spectra along with the DSC measurement...
Phase structures and mechanical properties of epoxy/acryl triblock copolymer alloys using several curing agents were studied. PMMA-b-PnBA-b-PMMA triblock copolymers synthesized by living anionic polymerization were applied as the toughening modifiers for the epoxy resins. An aromatic amine, an acid anhydride and an anionic polymerization catalyst as curing agents resulted in macro-phase separation...
Molecular vibrations of N,N-dimethylacrylamide (DMAA) and N,N-dimethylpropionamide (DMPA) in the liquid state were studied by means of Raman and IR spectra over the wide frequency range. It has been established in our previous work that DMPA involves two rotational isomers within its propionyl CH 3 –CH 2 –C(O)– group. In the present work, it is revealed that, like DMPA, DMAA also involves...
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