Investigation of Polymer Degradation Using NMR Relaxometry with Inverse Laplace Transformation

Bogaychuk, Alexander; Sinyavsky, N.; Kupriyanova, G. S.

doi:10.1007/s00723-016-0833-1

Cited by 10 publications

(2 citation statements)

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“…It has been shown that these factors may result in either a decrease or an increase in the polymer's transparency, which is associated with the mechanisms of crosslinking, crystallization and degradation of macromolecules. The correlation between the photocolorimetry data and the proton NMR distribution relaxation times of different parts of the polymer chain was obtained earlier [9]. In this previous article, the distribution of the spin-lattice spin-spin relaxation time NMR was used to characterize the mobility of macromolecules in different parts of the polymers and to crosslink the density of the polymer chains.…”

Section: Introductionmentioning

confidence: 92%

Polarimetric study of the optical anisotropy of polymers

Sinyavsky

Korneva

2017

Eur. J. Phys.

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This paper presents the results of an optical anisotropy study of a polymer film and the effect of temperature on birefringence. A method using a polariscope for the quantitative determination of the optical path difference is offered. The research findings are useful to students of physical and engineering specialities studying electromagnetic theory and optics. The described experiments and theoretical approaches are based on prominent aspects of modern optics. This work can be used to teach students the methods of polarimetry, the method of measuring optical anisotropy, and the basics of colorimetry. Students will learn a color description system to demonstrate the interference of polarized light, as well as being able to make a comparison between the numerical simulation and experiment of the interference pattern.

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Section: Introductionmentioning

confidence: 92%

Polarimetric study of the optical anisotropy of polymers

Sinyavsky

Korneva

2017

Eur. J. Phys.

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“…A number of different experiments have been reported in the literature that make use of the ILT including exchange [3], relaxation–relaxation [1,4], relaxation–diffusion [5], diffusion–diffusion [6], and chemical shift–diffusion [7] correlation approaches. These methods have been successfully applied to probe molecular dynamics and structure, for example via a diffusion coefficient or exchange rate, in many different type of systems such as polymers [8,9], rock [10,11], and biological systems [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Static Solid Relaxation Ordered Spectroscopy: SS-ROSY

Boutis

Kausik

2019

IJMS

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A two-dimensional pulse sequence is introduced for correlating nuclear magnetic resonance anisotropic chemical shifts to a relaxation time (e.g., T1) in solids under static conditions. The sequence begins with a preparatory stage for measuring relaxation times, and is followed by a multiple pulse sequence for homonuclear dipolar decoupling. Data analysis involves the use of Fourier transform, followed by a one-dimensional inverse Laplace transform for each frequency index. Experimental results acquired on solid samples demonstrate the general approach, and additional variations involving heteronuclear decoupling and magic angle spinning are discussed.

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