Physico-mechanical properties of natural rubber sheets coated by polyethyleneimine-functionalized poly(methyl methacrylate) nanoparticles

• Published in: Journal of applied polymer science Vol. 124; no. 1; pp. 49 - 57
• Main Authors: Duangphet, Sitthi, Jenjob, Somkieath, Sunintaboon, Panya, Rattanasom, Nittaya, Thanawan, Sombat
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05-04-2012; Wiley; Wiley Subscription Services, Inc
• Subjects: adsorption; Applied sciences; core-shell polymer; Elongation; Exact sciences and technology; Machinery and processing; Materials science; Miscellaneous; Nanoparticles; Natural rubber; natural rubber sheet; PMMA/PEI nanoparticle; Polyetherimides; Polymer industry, paints, wood; Polymers; Polymethyl methacrylates; Reduction; Rubber; Stretching; Surface chemistry; surface modification; Technology of polymers; adsorption; PMMA/PEI nanoparticle; Nanoparticle; surface modification; Adsorption isotherm; Methyl methacrylate polymer; Mechanical properties; natural rubber sheet; Natural rubber; Hardness; Experimental study; Property processing relationship; Latex; Coated material; Tensile strength; Surface treatment; Polyelectrolyte; core-shell polymer; Friction coefficient; Olefinimine polymer; Polyethylene imine; Tribology
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.34991

The surface modification of sulfur‐prevulcanized natural rubber (SPNR) sheets by the polyethyleneimine‐functionalized‐poly(methyl methacrylate) (PMMA/PEI) nanoparticles was successfully performed via a simple dipping method. The percentage of surface coverage (Cs) of the nanoparticles on SPNR sheets was found to be affected by a variation of nanoparticle latex concentrations and immersion times. The adsorption isotherm of PMMA/PEI nanoparticles on SPNR sheets was analyzed and found to fit well to the Freundlich model. After coating, it can be observed that the presence of PMMA/PEI nanoparticles on SPNR surface had no effects over the SPNR mechanical properties e.g., tensile strength, elongation at break, and hardness. On the other hand, the coated SPNR sheets showed a reduction of surface friction coefficients and interfacial adhesion up to 45 and 59%, respectively. Furthermore, PMMA/PEI nanoparticles adsorbed on the SPNR surface was subjected to stretching and wearing conditions, and found to be stable for at least seven stretching and wearing cycles. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012