1H NMR Relaxation Studies of Cured Natural Rubbers with Different Carbon Black Fillers

1999 ◽  
Vol 72 (1) ◽  
pp. 1-14 ◽  
Author(s):  
J. Leisen ◽  
J. Breidt ◽  
J. Kelm
Keyword(s):  
Carbon Black ◽  
1H Nmr ◽  
Polymer Networks ◽  
Nmr Relaxation ◽  
Relaxation Data ◽  
Relaxation Experiment ◽  
Filling Materials ◽  
Physico Chemical ◽  
Rotational Motions ◽  
Insight Into

Abstract 1H NMR relaxation data provide insight into the effects of carbon black fillers on the structure of polymer networks in products based on natural rubber so that accepted ideas concerning the interaction between elastomeric networks and active filling materials are confirmed. A new 1H NMR relaxation experiment allows the direct investigation of dangling chains within the polymeric network. In samples containing carbon black a motional anisotropy is observed for these chain ends, while dangling chains in samples without carbon black fillers show isotropic rotational motions. The parameter q′, quantifying the motional anisotropy, is suggested to be a measure of the physico-chemical interactions between elastomer and filler.

Temperature and field dependent 1H-NMR relaxation data as probes of prostaglandin motional parameters in aqueous media

1984 ◽  
Vol 121 (2) ◽  
pp. 702-709 ◽  
Author(s):  
Niels H. Andersen ◽  
Bor-Sheng Lin ◽  
Khe T. Nguyen
Keyword(s):  
1H Nmr ◽  
Aqueous Media ◽  
Nmr Relaxation ◽  
Relaxation Data ◽  
Field Dependent

Relationships between 1H NMR Relaxation Data and Some Technological Parameters of Meat: A Chemometric Approach

2000 ◽  
Vol 147 (1) ◽  
pp. 89-94 ◽  
Author(s):  
Robert J.S Brown ◽  
Francesco Capozzi ◽  
Claudio Cavani ◽  
Mauro A Cremonini ◽  
Massimiliano Petracci ◽  
...  
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Technological Parameters ◽  
Relaxation Data ◽  
Chemometric Approach

Automatic classification of carbonate rocks permeability from 1H NMR relaxation data

2015 ◽  
Vol 42 (9) ◽  
pp. 4299-4309 ◽  
Author(s):  
Pablo Nascimento da Silva ◽  
Eduardo Corrêa Gonçalves ◽  
Edmilson Helton Rios ◽  
Asif Muhammad ◽  
Adam Moss ◽  
...  
Keyword(s):  
1H Nmr ◽  
Carbonate Rocks ◽  
Nmr Relaxation ◽  
Automatic Classification ◽  
Relaxation Data

Characterization of Polymer Adsorption on Disordered Filler Surfaces by Transversal 1H NMR Relaxation

1997 ◽  
Vol 70 (5) ◽  
pp. 747-758 ◽  
Author(s):  
H. Lüchow ◽  
E. Breier ◽  
W. Gronski
Keyword(s):  
Surface Roughness ◽  
Carbon Black ◽  
1H Nmr ◽  
Nmr Relaxation ◽  
Rubber Matrix ◽  
Adsorption Sites ◽  
Bound Rubber ◽  
Carbon Black Surface ◽  
Black Surface ◽  
Tan Δ

Abstract The transversal 1H NMR relaxation of the bound rubber shell of carbon black loaded elastomers can be decomposed into three relaxation regimes corresponding to the loosely bound rubber, the rubber that is immobilized on the carbon black surface and a third component of intermediate mobility. The relaxation time T2 of the intermediate component is related to the end-to-end distance of polymer segments between adsorption sites on the carbon black surface, by converting the relaxation times to length scales on the basis of recent work on NMR relaxation of elastomeric networks. From measurements on SBR loaded with carbon black N 220, a distance of 2.3 nm was obtained in agreement with characteristic dimensions of crystallite sizes and surface roughness as determined by atomic force and scanning tunneling microscopy. The analysis was applied to novel inversion blacks which give lower tan δ/60°C, and rolling resistance without affecting tan δ/0°C and wet skid behavior. These blacks were found to possess a higher density of adsorption sites and a greater surface roughness as compared to standard carbon blacks. In addition to the surface characterization, the analysis of the mobile component of the compound allowed the estimation of the density of entanglement couplings between the rubber matrix and the bound rubber shell.

Notizen:Oriented Adsorption of Benzene Molecules on Graphitized Carbon Black

1976 ◽  
Vol 31 (7) ◽  
pp. 853 ◽  
Author(s):  
B. Boddenberg ◽  
J. A. Moreno
Keyword(s):  
Carbon Black ◽  
Low Temperatures ◽  
Nmr Relaxation ◽  
Graphitized Carbon Black ◽  
Relaxation Data ◽  
New Model ◽  
Graphitized Carbon

Abstract A new model for the oriented adsorption of benzene molecules on graphitized carbon black at low temperatures is proposed which explains NMR relaxation data.

1H-NMR RELAXATION STUDIES ON THE NATURE OF THE SEMICONDUCTING STATE OF (TMTTF)2Br AND (TMTTF)2PF6: MAGNETISM

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-1095-C3-1097
Author(s):  
T. Takahashi ◽  
F. Creuzet ◽  
D. Jérôme ◽  
J. M. Fabre
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Relaxation Studies

scholarly journals First Insight into Nutraceutical Properties of Local Salento Cichorium intybus Varieties: NMR-Based Metabolomic Approach

2021 ◽  
Vol 18 (8) ◽  
pp. 4057
Author(s):  
Chiara Roberta Girelli ◽  
Francesca Serio ◽  
Rita Accogli ◽  
Federica Angilè ◽  
Antonella De Donno ◽  
...  
Keyword(s):  
1H Nmr ◽  
Cichorium Intybus ◽  
Resonance Spectroscopy ◽  
Metabolic Profiles ◽  
Whole Plant ◽  
Different Content ◽  
Insight Into ◽  
Nutraceutical Properties ◽  
Metabolomic Approach

Background: Plants of genus Cichorium are known for their therapeutic and nutraceutical properties determined by a wealth of phytochemical substances contained in the whole plant. The aim of this paper was to characterize the metabolic profiles of local Salento chicory (Cichorium intybus L.) varieties (“Bianca”, “Galatina”, “Leccese”, and “Otranto”) in order to describe their metabolites composition together with possible bioactivity and health beneficial properties. Methods: The investigation was performed by 1H-NMR spectroscopy and Multivariate Analysis (MVA), by which the metabolic profiles of the samples were easily obtained and compared. Results: The supervised Partial Least Squares Discriminant Analysis (PLS-DA) analysis showed as “Bianca” and “Galatina” samples grouped together separated by “Leccese” and “Otranto” varieties. A different content of free amino acids and organic acids was observed among the varieties. In particular a high content of cichoric and monocaffeoyl tartaric acid was observed for the “Leccese” variety. The presence of secondary metabolites adds significant interest in the investigation of Cichorium inthybus, as this vegetable may benefit human health when incorporated into the diet. Conclusions: The 1H-NMR (Nuclear Magnetic Resonance Spectroscopy) based characterization of Salento chicory varieties allowed us to determine the potential usefulness and nutraceutical properties of the product, also providing a method to guarantee its authenticity on a molecular scale.

Selective 1H-NMR relaxation investigations of membrane-bound drugs in vitro

1990 ◽  
Vol 36 (3) ◽  
pp. 209-213 ◽  
Author(s):  
E. Gaggelli ◽  
T. Di Perri ◽  
A. Orrico ◽  
P.L. Capecchi ◽  
F.Laghi Pasini ◽  
...  
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Membrane Bound

Recovering compartment sizes from NMR relaxation data

1991 ◽  
Vol 94 (3) ◽  
pp. 486-492 ◽  
Author(s):  
Kenneth P Whittall
Keyword(s):  
Nmr Relaxation ◽  
Relaxation Data

Insight into oil and gas-shales compounds signatures in low field 1H NMR and its application in porosity evaluation

2017 ◽  
Vol 252 ◽  
pp. 37-49 ◽  
Author(s):  
I. Habina ◽  
N. Radzik ◽  
T. Topór ◽  
A.T. Krzyżak
Keyword(s):  
1H Nmr ◽  
Oil And Gas ◽  
Low Field ◽  
Gas Shales ◽  
Insight Into
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