The interaction effects of montmorillonite and glycerol on the properties of polyvinyl alcohol-montmorillonite films

The effects of montmorillonite (MMT), glycerol (GL), and their interaction effects on the properties of polyvinyl alcohol-montmorillonite (PVA-MMT) films were evaluated. MMTincreased tensile strength (TS), b*, yellowness index (YI), and opacity of the films. MMT, however, reduced elongation (E%) and water vapor permeability (WVP) of the films. Theeffect of GL on the films was quite opposite MMT. In addition, the interaction effects ofMMT-GL on WVP, YI, and b* were significant (p<0.01). MMT contents could reduce WVPjust in the presence of GL in the films, while GL contents could increase WVP at all MMT concentrations. Furthermore, MMT contents could increase YI of the films at all GL concentrations, while GL could increase YI just at 20% MMT content. Strong affinities of MMT, and GL with PVA were proved by FTIR. Considering the target of utilizing PVAMMTfilms, appropriate concentrations of MMT, GL, and their proper combination should be selected

کلیدواژه ها:

Polyvinyl alcohol ، Composite film ، Montmorillonite ، Glycerol ، Interaction effects ، FTIR