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.

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.

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 Effect of Natural Rubber on the Properties of Bitumen and Bituminious Mixes

2019 ◽  
Vol 8 (9) ◽  
pp. 526-530
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Negative Effects ◽  
Rubber Latex ◽  
Fundamental Properties ◽  
Physical Attributes ◽  
Prolongation Of Life ◽  
Higher Temperature ◽  
To Come ◽  
To Receive

In India the leftovers of results of regular elastic latex are stored each year frequently wild causing disjoin natural and other financial negative effects. The ecological strong waste like elastic, swim tops, gloves and so on can be reused betterly so it is useful for what's to come. Numerous investigations have been done to discover other elective material to use as modifiers in bitumen blends on the improvement of its properties and expressway quality. Concentrates still today for the most part centered around mechanical and physical attributes of rubber treated blends in which swell elastic is utilized either as option in contrast to characteristic totals or as added substance. In this exploration Natural Rubber latex (as inflatable’s) has been utilized as bitumen modifier. Common elastic changed bitumen is utilized for the prolongation of life of state streets. The need to receive elastic for the utilization of development of the streets is predominantly that it lessens the expense of development and furthermore reused elastic is utilized as it limits the natural contamination. In this examination Natural Rubber latex (as inflatable’s) has been utilized as bitumen modifier. Bitumen when contrasted with the rubber treated bitumen is bit delicate when presented to traffic burden and temperature. The Rubberized bitumen shaped decreases perpetual distortions because of over-burden out and about and in this way unaffected by the progressions in environmental temperature and improves slide obstruction. Elastic expands protection from stream of bitumen at higher temperature and improves the protection from fragile break at low temperature. The upper surface layer of the asphalt has been made of rubber treated bituminous blends. Rheological attributes of rubber treated bitumen just as fundamental properties of the actualized, rubber treated bituminous blend are exhibited. The practices of the two modifiers were examined by far reaching research facility testing and assessment. It was seen that the expansion of normal elastic gave better by and large execution in the bituminous blends. Subsequently, this shows characteristic elastic may contribute toward better adaptable streets later on. The above properties increment the administration life of rubber treated streets much of the time to in excess of hundred percent when contrasted with that of bituminous streets. Accordingly changed elastic bitumen of streets will join reserve funds with security. Keywords: Inflatable Rubber, Remnants

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