The complete chemical structure of the macromolecular coupling agent is not disclosed since a patent is pending for this study.
Contribution of hydrogen and/or covalent bonds on reinforcement of natural rubber latex films with surface modified silica
Article first published online: 23 JAN 2014
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 12, June 15, 2014
How to Cite
2014). Contribution of hydrogen and/or covalent bonds on reinforcement of natural rubber latex films with surface modified silica. J. Appl. Polym. Sci. 131, 40380, doi: 10.1002/app.40380, and (
- Issue published online: 16 MAR 2014
- Article first published online: 23 JAN 2014
- Manuscript Accepted: 30 DEC 2013
- Manuscript Received: 8 SEP 2013
- hydrophilic polymers;
- surfaces and interfaces
A macromolecular coupling agent containing hydrophilic and hydrophobic groups is made to react with precipitated silica. Interfacial interactions between OH groups of silica and COOH groups of macromolecule are found to be created through either hydrogen bonds alone or through hydrogen bonds and covalent bonds. Aqueous dispersions of unmodified and modified silica are prepared and the colloidal stability and particle size distribution of the dispersions are observed. The dispersions at neutral pH are incorporated into vulcanized/unvulcanized natural rubber latex. The formation of hydrogen bonds and/or covalent bonds is studied via FTIR spectroscopy and their contribution in encouraging filler-rubber interactions is emphasized through mechanical and swelling properties. Uniform distribution and dispersion of modified filler particles throughout the rubber matrix is confirmed by the microstructures of the latex films cast from filler added natural rubber latex. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40380.