The exhibited studies, such as infrared spectroscopy and weight loss percentage, have demonstrated the improvement of photophysical properties for modified PVC and blended modified films in ...

1H and 13C chemical shifts of PVC chains have been evaluated using quantum chemistry methods in order to evidence and interpret the NMR signatures of chains bearing unsaturated and branched...

The 100-MHz proton NMR spectra of commercial and laboratory-prepared poly(vinyl chloride) (PVC) have been measured in various solvents at high temperature (80–150°C). Tacticity in PVC was determined by the analysis of the β-proton spectrum.

We measured 13C-{1H} NMR spectra of PVC and its dimer model compounds, i.e., mesa-and racemic-2,4-dichloropentanes. PVC was supplied by Prof. Benoit for the IUP AC Study Programm

2002年12月1日 · Differences in the molecular mobility of PVC have been characterized by 13 C NMR spectroscopy, and these are related to the polymerization process. The arrangement of the chain sequences affects the NMR parameters.

1996年1月1日 · 13 C NMR spectra, spin−lattice relaxation time T 1 (C) and spin−spin relaxation time T 2 (C) were obtained for various PVC−DOP samples. Line widths of 〉CH Cl show a sharp increase due to the strong hydrogen-bonding interaction between the …

We present a facile approach for the direct attachment of cross-linked poly (2-thiopheneacetic acid) onto the surface of magnetite nanoparticles with one single carbon layer (Fe3O4@1C NPs) via...

1994年9月1日 · Samples of PVC plasticized by di-isobutylphthalate and di-2-ethylhexylphthalate, with plasticizer content varying up to 180 parts per hundred, have been examined using solid-state 1 H- and 13 C-NMR. Proton spin-lattice relaxation times in both the laboratory and the rotating frames were measured, with analysis into multi-exponential components ...

1995年1月1日 · The molecular mobility of a polymer in the solid state can be determined by NMR relaxation measurements. The analysis of proton spin-lattice relaxation time (T 1 H) and proton spin-lattice relaxation time in the rotating frame (T 1 H ϱ ), allow information to be obtained about the behaviour of homogeneous samples.

The 1 H-NMR-spectra of raw poly (vinyl chloride) obtained at atmospheric pressure (U-PVC) have revealed the presence of high concentrations of branches. The content of labile chlorine was determined by reaction with phenole in order to estimate the branch points with tertiary chlorine.