I try to degradation of natural rubber latex using 20% low ammonia NR latex.
"Degradation of NR was carried out by preparing latex with 20% dry rubber content (DRC). The pH of the latex was adjusted using formic acid to obtain the required pH (pH 5–9). Under continuous stirring, the mixture was heated to 70 °C before hydrogen peroxide and sodium nitrite were added simultaneously. The latex was then coagulated using methanol and filtered. The LNR obtained was washed four times with distilled water and dried in a vacuum oven at 60 °C."
; Polymers 2014, 6, 2928-2941; doi:10.3390/polym6122928
When I slowly added formic acid to control pH, the liquid latex was coagulated. How can I experiment while maintaining a latex state?
Add H2O2 to latex and heat the solution at different temperatures. Then wait. H2O2 is weak acid, with time H2O2 becomes simple water
Dear Jihyeon Moon . The oxidative stability of rubbers depends on the structure of the rubber and the impurities contaminating the rubber. It is known that the oxidation of natural rubber is accelerated by the presence of metallic impurities. See the link: https://onlinelibrary.wiley.com/doi/abs/10.1002/app.1966.070101109#:~:text=Abstract,the%20presence%20of%20metallic%20impurities.
Kindly see also the following useful RG links: Chapter Degradation of natural rubber latex
https://www.martins-rubber.co.uk/blog/what-causes-rubber-to-deteriorate/
Also check please the following useful RG links: Article On the Catalyzed Oxidative Degradation of Natural Rubber Networks1
http://polymerdatabase.com/polymer%20chemistry/Thermal%20Degradation%20Elastomers.html
The following RG links are also very useful: Article Studies on thermal–oxidative degradation behaviours of raw n...
https://www.mdpi.com/1422-0067/19/10/2862/pdf
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