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The primary aim of this paper is to explore the influence of the number of CH 2 groups per –(CH 2 ) n OCOO– repeat unit (Num c ) on the properties of poly(alkylene carbonate)s. A series of poly(alkylene carbonate)s with different Num c , including PTMC (Num c = 3), PTeMC (Num c = 4), PPMC (Num c = 5), PHMC (Num c = 6) and...
Thin-film wide-angle X-ray diffraction, small-angle X-ray scattering, and density functional theory calculations using B3LYP hybrid functional with the two-dimensional periodic boundary conditions (2D-PBC) have been applied to study the crystal structures of parent and fluorinated polyurethanes. The crystal structures from 2D-PBC-B3LYP calculation and experiments showed the hard-segment chains within...
On the analyses of modulated differential scanning calorimetry, Fourier transform infrared spectra and quantum chemical calculations of fluorinated and corresponding unfluorinated polyurethanes, we investigated the effects of fluorination on the intermolecular hydrogen bonds and resulted morphological changes in polyurethanes. The B3LYP/6-31G(d′,p′) calculated values supported the experimental results...
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