2007
DOI: 10.1080/00914030701283063
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Evaluation of Composites Miscibility by Low Field NMR

Abstract: Solid state nuclear magnetic resonance (NMR) is a powerful technique to analyze polymer composites. The use of proton relaxation data to evaluate the dispersity of the dispersion phase in the composite and its homogeneity are very wide. In this work PVC=silica composites were prepared using different ratios to obtain a new material to be used in chromatograph column for separation of plant extracts. Thus, this study used proton spin-lattice and spin-spin nuclear magnetic resonance relaxation data, determined i… Show more

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Cited by 10 publications
(8 citation statements)
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“…In order to prepare any type of a composite, at least, two different materials must be mixed. Thus, a phase miscibility phenomenon appears to be of the paramount importance [ 61 , 62 ]. Furthermore, the interfacial strength among the phases is a very important factor because a lack of adhesion among the phases will result in an early failure at the interface and thus in a decrease in the mechanical properties, especially the tensile strength.…”
Section: General Information and Knowledgementioning
confidence: 99%
“…In order to prepare any type of a composite, at least, two different materials must be mixed. Thus, a phase miscibility phenomenon appears to be of the paramount importance [ 61 , 62 ]. Furthermore, the interfacial strength among the phases is a very important factor because a lack of adhesion among the phases will result in an early failure at the interface and thus in a decrease in the mechanical properties, especially the tensile strength.…”
Section: General Information and Knowledgementioning
confidence: 99%
“…Thus, a phase miscibility phenomenon appears to be of paramount importance. 97,98 Furthermore, the interfacial strength among the phases is a very important factor, because a lack of adhesion among the phases will result in an early failure at the interface and thus in a decrease in the mechanical properties, especially the tensile strength. From a chemical point of view, we can distinguish several types of interactions among the composite components: materials with strong (covalent, coordination, ionic) interactions; those with weak interactions (van der Waals forces, hydrogen bonds, hydrophilic-hydrophobic balance) and those without chemical interactions among the components.…”
Section: ©2 0 1 1 L a N D E S B I O S C I E N C E D O N O T D I S Tmentioning
confidence: 99%
“…Figure 6 shows the T 1 ρH curves with one fit, for PCL/Aerosil ® R972 and be attributed to the poor dispersion of unmodified silica oxide in the PCL matrix. However, for all hybrid ratios, the rigid domain, which has the highest relaxation parameter value, controls the relaxation process [31][32][33] . …”
Section: Nmr Analysismentioning
confidence: 99%
“…To better investigate the compatibility, dispersion and interaction between both hybrid components, proton spin-lattice relaxation time (Table 3) and proton spin-lattice relaxation time in the rotating frame (Table 4) were determined in a low-field NMR spectrometer 31 . The influence of silica oxide dispersion in the PCL crystalline phase was also investigated.…”
Section: Nmr Analysismentioning
confidence: 99%