Results 301 to 310 of about 490,273 (356)
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Polymer, 1999
Pure gas transport properties of natural rubber (NR), epoxidised natural rubber (ENR) and their blends have been determined. The permeabilities of the pure polymers and blends were determined with nitrogen and oxygen. The relation between oxygen-to-nitrogen selectivity and the glass transition temperature has been studied.
T. Johnson, Sabu Thomas
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Pure gas transport properties of natural rubber (NR), epoxidised natural rubber (ENR) and their blends have been determined. The permeabilities of the pure polymers and blends were determined with nitrogen and oxygen. The relation between oxygen-to-nitrogen selectivity and the glass transition temperature has been studied.
T. Johnson, Sabu Thomas
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Natural rubber blends with epoxidized natural rubber
Journal of Macromolecular Science, Part B, 1997Abstract Blends of NR with ENR have been prepared in full composition following the polymer blend technique. Basic properties (mastication behavior and thermal degradation of each rubber and Mooney viscosity, Flory-Huggins interaction parameters, and cure characteristics of the blends) of the uncured blends were determined, in addition to the reversion,
Sang Yup Lee, Byung Kyu Kim, Joon Kim
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Silicone rubber and natural rubber as biomaterials
Medical & Biological Engineering & Computing, 1980The roles of silicone rubber and natural rubber as biomaterials are contrasted, with silicone rubber being widely used and natural rubber having, as yet, found limited application. Relevant properties of both elastomers are described, applications are discussed and possible future developments are considered.
T. Gilchrist, J. M. Courtney
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The cyclization of natural rubber
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963Several methods of measuring the unsaturation remaining in natural rubber after cyclization have been compared. Approximate agreem ent was obtained with the reagents, perbenzoic acid, phenyl iododichloride and ozone; iodine chloride gave high values. Perbenzoicacid is considered the most satisfactory of these reagents. The unsaturation in some cyclized
J. Scanlan, W. F. Watson, D. F. Lee
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Rubber Chemistry and Technology, 1985
Abstract When natural rubber is epoxidized under carefully controlled conditions, it can be converted to a totally new polymer with some properties more akin to speciality rubbers and some properties that appear to be advantageous for tire treads. Three levels of epoxidation have been extensively evaluated.
I. R. Gelling, R. Newell, C. S. L. Baker
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Abstract When natural rubber is epoxidized under carefully controlled conditions, it can be converted to a totally new polymer with some properties more akin to speciality rubbers and some properties that appear to be advantageous for tire treads. Three levels of epoxidation have been extensively evaluated.
I. R. Gelling, R. Newell, C. S. L. Baker
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Infrared studies on natural rubber and aged natural rubber
Journal of Polymer Science, 1955AbstractIn the infrared absorption spectra of solutions of natural rubber in carbon tetrachloride, two new absorptions are observed, one at 6.52 μ and another at 8.2 μ. These bands disappear when films from the solution are examined. Possible origins of these bands are discussed and it is suggested that the absorption at 6.52 μ may be due to a ...
J. B. Pande +2 more
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Natural and Synthetic Rubber. VII. Fractional Precipitation of Natural Rubber
Rubber Chemistry and Technology, 1931Abstract Temperature—concentration diagrams are given of the systems natural rubber—alcohol—benzene, pure rubber—alcohol—benzene and synthetic rubber—alcohol—benzene. A method based on these diagrams is given for the separation of nitrogen-free rubber hydrocarbon by fractional precipitation of natural rubber from a mixture of alcohol and ...
Albert L. Henne +2 more
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2009
Natural rubber, India rubber and caoutchouc are all names for the solid elastic material isolated, one way or another, from the ‘milk’ or latex of Hevea brasiliensis, and various other tropical plants like Castilloa elastica.
Vaysse, Laurent +3 more
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Natural rubber, India rubber and caoutchouc are all names for the solid elastic material isolated, one way or another, from the ‘milk’ or latex of Hevea brasiliensis, and various other tropical plants like Castilloa elastica.
Vaysse, Laurent +3 more
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Biodegradation of natural rubber and deproteinized natural rubber by enrichment bacterial consortia
Biodegradation, 2020This study examined the biodegradation of natural rubber (NR) and deproteinized natural rubber (DPNR) by bacterial consortia enriched from a rubber-processing factory's waste in Vietnam. The results reveal the degradation in both NR and DPNR, and the DPNR was degraded easier than NR.
Viet Linh Dao +13 more
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Cryoground Rubber-Natural Rubber Blends
Rubber Chemistry and Technology, 1984Abstract Addition of cryoground rubber (CGR) causes changes in curing characteristics (decrease in Mooney scorch time, optimum cure time, and reversion time) and shows a detrimental effect on most of the vulcanizate properties (tensile, resilience, flex, hysteresis, set, and abrasion).
S. K. Chakraborty +2 more
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