Natural Higher Fatty Acid Soaps in Natural Rubber Latex Concentrate and Correlations to Other Latex Variables

1986 ◽  
Vol 59 (1) ◽  
pp. 84-102 ◽  
Author(s):  
C. W. Jurado ◽  
K. G. Mayhan
Keyword(s):  
Fatty Acid ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Free Form ◽  
Rubber Latex ◽  
Rubber Phase

Abstract The amounts and types of HFA soaps found in latex did not vary greatly from sample to sample. Greater than 95% of the free HFA soaps were associated with the rubber phase of the latex. The distribution of fatty acid soaps were markedly different in the serum and latex samples. About 80–90% of the HFA soaps are in their free form, but only about 50% of the furanoic acid was in its free form. Titration results agree fairly well with the GC results and indicate that titration can be a useful measure of HFA.

A Comparative Study of the Processing and Properties of Natural and Synthetic Polyisoprene Rubber Latex

1970 ◽  
Vol 43 (5) ◽  
pp. 1255-1274 ◽  
Author(s):  
A. D. T. Gorton
Keyword(s):  
Fatty Acid ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Unique Combination ◽  
Synthetic Material ◽  
Rubber Latex ◽  
Natural Counterpart ◽  
Rubber Phase ◽  
To Receive ◽  
Synthetic Latex

Abstract A comparison of natural polyisoprene latex with that of synthetic polyisoprene latex included latex properties, raw latex films, compound stability and processing, prevulcanization, vulcanizate properties, foam rubber, dipping, and adhesives. A number of differences were seen between the two latexes. It is obvious that synthetic polyisoprene latex is a very different latex to its natural counterpart. In many properties in the wet and dry state, raw or vulcanized, the synthetic latex shows inferior properties to that of natural latex. The unique combination of the polyisoprene rubber phase and the stabilizing system of protein/fatty acid soap in natural rubber latex concentrate make it superior in processing and properties to the synthetic polyisoprene latex. Many of the published claims for the synthetic material failed to receive experimental support in this study.

scholarly journals INFLUENCE OF THE VOLATILE FATTY ACID CONTENT TO RADIATION VULCANIZED NATURAL RUBBER LATEX (RVNRL)

2012 ◽  
Vol 09 (17) ◽  
pp. 38-41
Author(s):  
Hugo David CHIRINOS ◽  
Sueli CARVALHO DE JESUS
Keyword(s):  
Fatty Acid ◽  
Natural Rubber ◽  
Acid Content ◽  
Volatile Fatty Acid ◽  
Fatty Acid Content ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Protein Layer ◽  
Physical Strength ◽  
The Stability

Natural rubber latex is a dispersion of natural rubber particles in water. These particles are coated with a protein layer which will stabilize the dispersion in water by forming an electric charge in the layer. Any different condition affecting this layer disturbs the stability of dispersion. Microorganism attack disturbs the protein layer and consequently the stability of the dispersion. By adding 1.2% by weight of NH3, the stability of the dispersion can be improved. The fresh latex was irradiated by Co-60 with irradiation dose of 10, 20, 30, 40 and 100 kGy. The results showed a relationship between the volatile fatty acid content (VFA, product from microorganism attack on carbohydrate) and the green strength or the physical properties of vulcanized film. Low VFA number showing a higher physical strength of the film either un-vulcanized or vulcanized. It appeared that the structure was responsible in yielding a good physical property of the film.

scholarly journals Natural rubber latex used as drug delivery system in guided bone regeneration (GBR)

2009 ◽  
Vol 12 (2) ◽  
pp. 253-256 ◽  
Author(s):  
Rondinelli Donizetti Herculano ◽  
Cecília Pereira Silva ◽  
Cibele Ereno ◽  
Sérgio Augusto Catanzaro Guimaraes ◽  
Angela Kinoshita ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Natural Rubber ◽  
Bone Regeneration ◽  
Drug Delivery System ◽  
Delivery System ◽  
Natural Rubber Latex ◽  
Guided Bone Regeneration ◽  
Rubber Latex
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