ISSN 2375-0979
African Journal of Wood Science and Forestry ISSN 2375-0979 Vol. 5 (3), pp. 288-295, May, 2017. © International Scholars Journals
Full Length Research Paper
Categorization of exfoliated nano-composite of polyvinyl acetate and montmorillonite
*Tsung Qing Wen and lin Sun Yang
College of Wood Science and Technology, Nanjing Forestry University, Nanjing 210037, Jiangsu, China.
E-mail: [email protected]
Accepted 15 April, 2017
Abstract
To improve the chemical, physical, and mechanical properties of polyvinyl acetate (PVAc), montmorillonite (MMT) was added in the synthesis of PVAc in conventional lab conditions. The final product was studied mainly by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), static tensile, and the rheology was also investigated by the power-law function equation and the Cross-Williamson model viscous equation. The exfoliated nano-composite of PVAc-MMT was obtained. Linear macromolecular chains of PVAc were formed in MMT layers. MMT was exfoliated into layers or sheets of nano-particles, and randomly dispersed in PVAc matrix. The particle diameter of MMT ranged from 50 to 100 nm, while PVAc’s ranged from 250 to 500 nm, the smaller MMT particles were adsorbed around the larger PVAc particles to form the “Strawberry” structure. In addition, PVAc and PVAc-MMT were pseudo-plastic Non-Newtonian fluids, they all possessed the normal stress effect (or Weissenberg effect), that was the pole-climbing phenomenon.
Key words: Polyvinyl acetate (PVAc), montmorillonite (MMT), chemical structure, dispersion, particles, rheology, static tensile.