A model study on the impact of metal ions on pre-vulcanization of concentrated natural rubber latex and dipped-products
Issued Date
2022-02-01
Resource Type
ISSN
14777606
eISSN
14782413
Scopus ID
2-s2.0-85121793548
Journal Title
Progress in Rubber, Plastics and Recycling Technology
Volume
38
Issue
1
Start Page
125
End Page
138
Rights Holder(s)
SCOPUS
Bibliographic Citation
Progress in Rubber, Plastics and Recycling Technology Vol.38 No.1 (2022) , 125-138
Suggested Citation
Rojruthai P., Payungwong N., Sakdapipanich J.T. A model study on the impact of metal ions on pre-vulcanization of concentrated natural rubber latex and dipped-products. Progress in Rubber, Plastics and Recycling Technology Vol.38 No.1 (2022) , 125-138. 138. doi:10.1177/14777606211062909 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/84112
Title
A model study on the impact of metal ions on pre-vulcanization of concentrated natural rubber latex and dipped-products
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
A model study on the influence of some heavy metal ions on the stability and vulcanization efficiency of uncompounded and compounded high-ammonia natural rubber (HANR) latex was carried out by an exogenous addition and then determined by Brookfield viscometer, mechanical stability time (MST) tester, and tensile testing machine. The case of pre-vulcanized HANR latex with different aging times was determined by the change in the volatile fatty acid (VFA) number, MST, and viscosity. The compounded HANR latex was coagulated by adding Mn2+and Mg2+ while it was unaltered by adding Zn2+, Fe2+, and Cu2+ ions, leading to their colloidal stability. Therefore, these metal ions were chosen further to study the pre-vulcanization of compounded HANR latex. The presence of Zn2+, Fe2+, and Cu2+ in the latex is responsible for the delay in the vulcanization process and changes the appearance of compounded latex. Before compounding, the addition of such metal ions led to the reduction in tensile strength of the obtained gloves. At the same time, there was no effect on the tensile properties of the gloves made from the compounded HANR latex containing the metal ions.