Results 311 to 320 of about 490,273 (356)
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Clinical and Experimental Dermatology, 1999
Rubber is an important industrial and consumer product encountered in many household items and medical devices. Whereas the chemical additives used in its manufacture are well recognized as a cause of delayed-type hypersensitivity (allergic contact dermatitis), it is only during the past decade that immediate-type allergy to natural rubber latex (NRL ...
Ian R. White, S H Wakelin
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Rubber is an important industrial and consumer product encountered in many household items and medical devices. Whereas the chemical additives used in its manufacture are well recognized as a cause of delayed-type hypersensitivity (allergic contact dermatitis), it is only during the past decade that immediate-type allergy to natural rubber latex (NRL ...
Ian R. White, S H Wakelin
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NATURAL AND SYNTHETIC RUBBER. I. PRODUCTS OF THE DESTRUCTIVE DISTILLATION OF NATURAL RUBBER
Journal of the American Chemical Society, 1929Abstract Two hundred pounds of pale crepe rubber have been destructively-distilled at atmospheric pressure. The distillate was fractionated and its components identified from C5 to C10, as shown in the table. Assuming that the Staudinger formula is correct, that the single bonds furthest from the double bonds are the weaker spots and that the ...
Thomas Midgley, Albert L. Henne
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Alternative sources of natural rubber
Applied Microbiology and Biotechnology, 2000Rubber (cis-1,4-polyisoprene) is one of the most important polymers naturally produced by plants because it is a strategic raw material used in more than 40,000 products, including more than 400 medical devices. The sole commercial source, at present, is natural rubber harvested from the Brazilian rubber tree, Hevea brasiliensis.
Mooibroek, H., Cornish, K.
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TENSILE PROPERTY OF EPOXIDIZED NATURAL RUBBER/NATURAL RUBBER BLENDS
Polymer-Plastics Technology and Engineering, 2000The tensile strength and elongation at break of epoxidized natural rubber (ENR) blended with natural rubber (NR) was studied. ENR 25, ENR 50, and one grade of natural rubber (SMR L) were used as the elastomers. The composition of ENR was varied from 0% to 100% rubber.
G. K. Khok, B.T. Poh
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2012
Hevea brasiliensis tree is the only source of natural rubber (NR), and for decades, has had a significant share (more than 40%) in the elastomeric market. This biopolymer is made of poly(cis-1,4-isoprene) associated with several other biological compounds. In this chapter, first, the current challenges faced by the NR supply chain are reviewed.
L. Vaysse +3 more
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Hevea brasiliensis tree is the only source of natural rubber (NR), and for decades, has had a significant share (more than 40%) in the elastomeric market. This biopolymer is made of poly(cis-1,4-isoprene) associated with several other biological compounds. In this chapter, first, the current challenges faced by the NR supply chain are reviewed.
L. Vaysse +3 more
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Natural Rubber Biosynthesis in Plants
2012Rubber biosynthesis in plants is a fascinating biochemical system, which evolved at the dawn of the dicotyledoneae and is present in at least four of the dictolydonous superorders. Rubber biosynthesis is catalyzed by a membrane complex in a monolayer membrane envelope, requires two distinct substrates and a divalent cation cofactor, and produces a high-
Katrina Cornish, Wenshuang Xie
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Reinforcement of natural rubber
Journal of Applied Polymer Science, 2002AbstractIn this article, we report on recent investigations on filled natural rubber. These investigations include a mechanical characterization as well as a molecular analysis based on measurements of chain orientation. It is demonstrated that at intermediate strains, the increase in the moduli can be explained by the inclusion of rigid particles in ...
Olivier Rapoport, Liliane Bokobza
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2000
Natural cis-1 ,4-po1yisoprene occurs in over 2000 species of higher plants, the most well known of which is natural rubber from Hevea brasiliensis. Other plants, such as guayule (Parthenium argentatum), Russian dandelion (Taraxacum kok-saghyz), goldenrod (Solidago altissima), Jelutong (Dyera retusa), and fungal genera such as Lactarius volemus have ...
A. H. Eng, E. L Ong
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Natural cis-1 ,4-po1yisoprene occurs in over 2000 species of higher plants, the most well known of which is natural rubber from Hevea brasiliensis. Other plants, such as guayule (Parthenium argentatum), Russian dandelion (Taraxacum kok-saghyz), goldenrod (Solidago altissima), Jelutong (Dyera retusa), and fungal genera such as Lactarius volemus have ...
A. H. Eng, E. L Ong
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Journal of Macromolecular Science, Part A, 2017
ABSTRACTNatural rubber obtained from a milky colloid (latex) extras mainly from the tree Hevea Brasiliensis is approximately 95% cis-polyisopren has important physical properties. Among its shortcomings are resistance to aging and thermal stability that limits its applications.
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ABSTRACTNatural rubber obtained from a milky colloid (latex) extras mainly from the tree Hevea Brasiliensis is approximately 95% cis-polyisopren has important physical properties. Among its shortcomings are resistance to aging and thermal stability that limits its applications.
openaire +2 more sources