Radiation processing and characterization of poly(vinyl alcohol) nano-composites, Part 1: Nano-particulate filler tuned crosslinking behavior



Nano-composites of poly vinyl alcohol containing different nano-fillers namely multiple walled carbon nanotubes (MWNT), single walled carbon nanotubes (SWNT), silica nanoparticles, and silver nanoparticles were prepared by sonication-assisted solution mixing and subjected to different doses of gamma radiation. The efficacy of radiation crosslinking was analyzed by sol–gel analysis, Charlesby-Pinner parameter estimation and crosslinking density measurements. Crosslinking of nano-composites was found to increase with radiation dose and markedly affected with the type of nano-particulate filler in the matrix (po/qo in the range: 0.40–0.83). The results have been explained on the basis of Raman spectroscopy, hydrodynamic volume measurements, contact angle measurements, and scanning electron microscopy (SEM). © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010