A STUDY ON THERMO-CHEMICAL CHANGES OF NATURAL RUBBER

2015 ◽  
pp. 189-196
Keyword(s):  
Natural Rubber ◽  
Chemical Changes

Reaction of Deuterio Polyisoprene and Deuterio Polybutadiene with Sulfur

1963 ◽  
Vol 36 (1) ◽  
pp. 219-235
Author(s):  
J. J. Shipman ◽  
M. A. Golub
Keyword(s):  
Absorption Band ◽  
Infrared Spectrum ◽  
Natural Rubber ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Crosslinking Reaction ◽  
Infrared Absorption Spectroscopy ◽  
Chemical Changes ◽  
The Past ◽  
Soft Rubber

Abstract Infrared absorption spectroscopy has been employed in the past in efforts to determine the nature of the chemical changes which occur in natural rubber during vulcanization. The most prominent change in the infrared spectrum of rubber accompanying vulcanization with sulfur is the appearance of a new absorption band at 10.4 µ. In the spectra of useful soft rubber vulcanizates this band is barely detectable, while in those of hard rubber (ebonite) it is moderately intense. It has not been known whether this band is related in some way to the actual crosslinking reaction or is the result of some noncrosslinking reaction between the rubber and sulfur molecules.

The influence of cure and carbon black on the high temperature oxidation of natural rubber I. Correlation of physico-chemical changes

1999 ◽  
Vol 64 (2) ◽  
pp. 197-205 ◽  
Author(s):  
Michele Edge ◽  
Norman S. Allen ◽  
Rosa Gonzalez-Sanchez ◽  
Christopher M. Liauw ◽  
Simon J. Read ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Black ◽  
Natural Rubber ◽  
High Temperature Oxidation ◽  
Chemical Changes ◽  
Temperature Oxidation ◽  
Physico Chemical

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
Sign in / Sign up

Export Citation Format

Share Document