The influence of surface structure of low industrial grade seaweed and semi‐refined carrageenan on mechanical and physical properties of natural rubber latex composites

2018 ◽  
Vol 25 (3) ◽  
pp. 278-286
Author(s):  
Norhazariah Samsir ◽  
Azura A. Rashid ◽  
Baharin Azahari
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Surface Structure ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Industrial Grade ◽  
Mechanical And Physical Properties

Natural rubber latex foam production using air microbubbles: Microstructure and physical properties

2020 ◽  
Vol 260 ◽  
pp. 126916 ◽  
Author(s):  
Sanit Sirikulchaikij ◽  
Rungrote Kokoo ◽  
Matthana Khangkhamano
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Foam Production

scholarly journals Pengaruh Konsentrasi Asam Sulfat (H2SO4) pada Hidrolisa Tongkol Jagung (Zea mays) Menjadi Nanokristal Selulosa sebagai Filler Penguat pada Produk Lateks Karet Alam

2019 ◽  
Vol 8 (2) ◽  
pp. 48-53
Author(s):  
Hamidah Harahap ◽  
Azwin Harfansah Nst ◽  
Ilhamdi Fujian Junaidi
Keyword(s):  
Sulfuric Acid ◽  
Natural Rubber ◽  
Physical Properties ◽  
Mechanical Test ◽  
Natural Rubber Latex ◽  
Spherical Shape ◽  
Rubber Latex ◽  
Hydrolysis Process ◽  
Cross Connect ◽  
Vulcanization Process

This research studied about the effect of concentrations sulfuric acid (H2SO4) on the hydrolysis process of corn cobs waste to manufacture of cellulose nanocrystal (NCC) which will be applied as fillers in natural rubber latex. This study began with a pre-vulcanization process of natural rubber latex at a temperature of 70 oC and followed by a vulcanization process at 110 oC for 10 minutes. The results of the testing of physical properties indicate that the higher amount of NCC loading will result in higher crosslinked denotes, while the results of testing the mechanical properties indicate that the maximum value is achieved at the loading of NCCs as much as 6 phr. The mechanical test results supported by the analysis of Scanning Electron Microscopy (SEM) showing the NCC have spread well. Characterization of the Transform Electron Microscope (TEM) shown  the resulting of NCC was spherical shape with the size of NCC produced for each concentration of sulfuric acid (H2SO4) 45%, 55%, and 65% respectively 57.65 nm; 28.43 nm; and 82.61 nm with an amount of each 0.849 g; 1,824 g; and 0.681 g. The mechanical and physical properties of the optimum natural rubber latex products occurred in the loading of nanocrystal cellulose with a number of 6 bsk, where the values ​​of cross-connect density, tensile strength, elongation at break, M200 and M300 were respectively 10.6234 2Mc-1x10- 5; 18.2 MPa; 780%; 2.23 MPa and 2.7 MPa.

Film from Mixtures of Natural and Synthetic Rubber Latex. Physical Properties

1952 ◽  
Vol 25 (4) ◽  
pp. 983-994
Author(s):  
R. M. Pierson ◽  
R. J. Coleman ◽  
T. H. Rogers ◽  
D. W. Peabody ◽  
J. D. D'Ianni
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Natural Rubber Latex ◽  
Synthetic Polymers ◽  
Rubber Latex ◽  
Stress Strain ◽  
Synthetic Rubber ◽  
Mooney Viscosity ◽  
The One ◽  
Rubber Stock

Abstract When tested in a single standardized procedure for cast latex films, the type of synthetic-rubber latex employed in latex blends containing 70 per cent or more natural-rubber latex had little effect on the stress-strain properties of the mixture. Cold-rubber latexes imparted higher stress-strain values to blends with natural rubber than did the corresponding hot-rubber latexes. The improvement was particularly noted on comparison of tensile product values. Low-conversion synthetic polymers produced higher stress-strain properties than high-conversion polymers in blends with natural rubber, even though their tensile strengths in 100 per cent synthetic stocks were approximately equal. Optimum physical properties were obtained by use of blends with synthetic polymers of medium Mooney viscosity. It is believed that the appearance of an optimum Mooney viscosity is tied in with the necessity of having quite high molecular weight on the one hand, and, on the other, the ability of the particles to knit well, the latter in turn requiring a comparative freedom from tight gel. Tensile product values increased with increasing styrene content in the synthetic polymer, but, correspondingly, the low-temperature stiffening increased. The physical properties of a natural rubber stock are far superior to those of any of the synthetic-rubber latexes tested to date. Cold-rubber latexes now in production are an improvement over high-temperature latexes, for example, in wet gel strength but do not approach natural rubber latex in stress-strain properties.

Natural Rubber Latex and Its Effects on Some Properties of Bitumen.

2020 ◽  
Vol 13 ◽  
Author(s):  
Osei T. ◽  
Tagbor T. A. ◽  
Awudza J. A.M.
Keyword(s):  
Specific Gravity ◽  
Natural Rubber ◽  
Physical Properties ◽  
Softening Point ◽  
Asphalt Binder ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Point Temperature ◽  
Aging Test ◽  
Ft Ir

: In Ghana, the main binder for asphalt roads is bitumen. However there are many cases of early road deterioration resulting sometimes from effects of temperature on asphalt binder (bitumen). For this reason several studies are on-going to develop bitumen suitable for the climatic condition in the country. This study examines some physical properties such as softening point temperature, viscosity, penetration temperature and specific gravity and chemical functionalities, peak intensity and new functional group of AC 10 grade bitumen modified with natural rubber latex (L) at levels between 1-5% and 10% as well as its effect on aging at 5 and 10% blends. Standard methods of determinations of the physical properties, Fourier Transform Infra-Red Spectroscopy (FT-IR) Test and Short term aging test were employed. Results indicated that upon addition of 1% natural rubber latex, all the properties tested decrease. Further increasing the percentage of natural rubber latex decreases penetration point but the softening point temperature, specific gravity and viscosity increases. Spectroscopy analysis result revealed that there was no change in peaks intensities of the blends as compared to the conventional bitumen. Aging test results indicated a change in mass of 0.112% for 5% blend and 0.152% for 10% blend. The study has shown that natural rubber could improve some properties of bitumen andcould be used for constructing more durable roads.

Effect of the vulcanization time and storage on the stability and physical properties of sulfur-prevulcanized natural rubber latex

2005 ◽  
Vol 97 (5) ◽  
pp. 1804-1811 ◽  
Author(s):  
K. K. Sasidharan ◽  
Rani Joseph ◽  
Shiny Palaty ◽  
K. S. Gopalakrishnan ◽  
G. Rajammal ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
The Stability ◽  
And Storage

scholarly journals Reinforcement of Natural Rubber with Bacterial Cellulose via a Latex Aqueous Microdispersion Process

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Sirilak Phomrak ◽  
Muenduen Phisalaphong
Keyword(s):  
Natural Rubber ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Bacterial Cellulose ◽  
Composite Films ◽  
Natural Rubber Latex ◽  
Structural Morphology ◽  
High Mechanical Strength ◽  
Elongation At Break ◽  
Mechanical And Physical Properties

Natural rubber (NR) composites were reinforced with bacterial cellulose (BC) to improve mechanical and physical properties. The natural rubber bacterial cellulose (NRBC) composite films were prepared via a latex aqueous microdispersion process by a thorough mixing of BC slurry with natural rubber latex (NRL). The structural morphology and chemical and physical properties of NRBC composites were investigated. The hydrophilicity, opacity, and crystallinity of the NRBC composites were significantly enhanced because of the added BC. By loading BC at 80 wt.%, the mechanical properties, such as Young’s modulus and tensile strength, were 4,128.4 MPa and 75.1 MPa, respectively, which were approximately 2,580 times and 94 times those of pure NR films, respectively, whereas the elongation at break of was decreased to 0.04 of that of the NR film. Because of its high mechanical strength and thermal stability, the NRBC composites have potential uses as high mechanical strength rubber-based products and bioelastic packaging in many applications.

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