Potassium-N-Butyl Xanthate as a New Antioxidant for Natural Rubber

1991 ◽  
Vol 30 (4) ◽  
pp. 405-411 ◽  
Author(s):  
P. Rajalingam ◽  
Ganga Radhakrishnan
Keyword(s):  
Natural Rubber ◽  
Butyl Xanthate

Studies on Synthesis and Characterisation of Zinc Butyl Xanthate and its Room Temperature Curing Property in Natural Rubber

2007 ◽  
Vol 23 (3) ◽  
pp. 195-208 ◽  
Author(s):  
Shiny Palaty ◽  
Rani Joseph
Keyword(s):  
Natural Rubber ◽  
Room Temperature ◽  
Mechanical Stability ◽  
Resonance Spectroscopy ◽  
Butyl Xanthate ◽  
Elongation At Break ◽  
H Nmr ◽  
Compression Set ◽  
Diethyl Dithiocarbamate ◽  
Stability Time

Zinc butyl xanthate [Zn(bxt)2] was prepared in the laboratory. It was purified by reprecipitation and was characterised by infrared spectroscopy (IR), Proton Magnetic Resonance spectroscopy (H-NMR) and thermogravimetric analysis (TGA) techniques. Gum and black filled natural rubber (NR) compounds were prepared using zinc butyl xanthate alone and zinc butyl xanthate in combination with zinc diethyl dithiocarbamate (ZDC) as accelerators and were cured at room temperature. The sheets were moulded and properties such as tensile strength, tear strength, crosslink density, elongation at break, compression set, abrasion resistance etc. were evaluated. NR latex was compounded using Zn(bxt)2/ZDC accelerator combination. It was prevulcanised at room temperature and properties like mechanical stability time (MST), pH, potassium hydroxide (KOH) number and Volatile fatty acid (VFA) number of the prevulcanised latex were measured. Sheets were prepared by casting and tensile properties were measured. The results showed that Zn(bxt)2 and Zn(bxt)2/ZDC combination were effective for the vulcanisation of NR and NR latex at room temperature.

Extraction and identification of fillers and pigments from pyrolyzed rubber and tire samples

1996 ◽  
Vol 54 ◽  
pp. 174-175
Author(s):  
P. Sadhukhan ◽  
J. B. Zimmerman
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Carbon Black ◽  
Natural Rubber ◽  
Transmission Electron Microscope ◽  
Rolling Resistance ◽  
Synthetic Polymers ◽  
Nitrogen Atmosphere ◽  
Transmission Electron ◽  
Curing Agents

Rubber stocks, specially tires, are composed of natural rubber and synthetic polymers and also of several compounding ingredients, such as carbon black, silica, zinc oxide etc. These are generally mixed and vulcanized with additional curing agents, mainly organic in nature, to achieve certain “designing properties” including wear, traction, rolling resistance and handling of tires. Considerable importance is, therefore, attached both by the manufacturers and their competitors to be able to extract, identify and characterize various types of fillers and pigments. Several analytical procedures have been in use to extract, preferentially, these fillers and pigments and subsequently identify and characterize them under a transmission electron microscope.Rubber stocks and tire sections are subjected to heat under nitrogen atmosphere to 550°C for one hour and then cooled under nitrogen to remove polymers, leaving behind carbon black, silica and zinc oxide and 650°C to eliminate carbon blacks, leaving only silica and zinc oxide.

Novel Approaches of Using of Spirulina Platensis in Natural Rubber Based Composites

2018 ◽  
Vol 6 (7) ◽  
pp. 680-687
Author(s):  
Ewa Głowińska ◽  
Janusz Datta ◽  
Paulina Parcheta and Natalia Kaźmierczak
Keyword(s):  
Natural Rubber ◽  
Spirulina Platensis ◽  
Novel Approaches

Tensile Strength of Protein-free Natural Rubber and its Vulcanizate Soaked in Water

2020 ◽  
Vol 93 (9) ◽  
pp. 293-299
Author(s):  
Luu Thanh HUYEN ◽  
Chen Ao RAN ◽  
Yoshimasa YAMAMOTO ◽  
Seiichi KAWAHARA
Keyword(s):  
Tensile Strength ◽  
Natural Rubber

Rubber Fracture Characterization Using J-Integral

1988 ◽  
Vol 16 (1) ◽  
pp. 44-60 ◽  
Author(s):  
C. L. Chow ◽  
J. Wang ◽  
P. N. Tse
Keyword(s):  
Crack Initiation ◽  
Carbon Black ◽  
Natural Rubber ◽  
Fracture Parameter ◽  
J Integral ◽  
Specimen Length ◽  
Fracture Characterization ◽  
Premature Failure ◽  
Testing Procedures ◽  
Material Evaluation

Abstract The use of the J-integral to investigate fracture characterization in a carbon black reinforced natural rubber is described. Three applications to crack initiation are included: two based on the use of a hypothetical zero specimen length and one on conventional testing procedures for metals. While the validity of the zero-length methods is questionable, the conventional method yielded a consistent Jc value of 1.01 N/mm for a typical tire compound. This value was obtained from 24 combinations of varying specimen geometries and pre-crack lengths. The J-integral is revealed as a valid fracture parameter that is applicable not only for material evaluation but also for designing tire structures to resist premature failure. These conclusions disagree with those from an earlier investigation, so the causes for the discrepancies are examined and discussed.

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