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Investigation on Polyacrylonitrile/Cellulose Acetate Blends  

Barani, Hossein (Department of Textile Engineering, Islamic Azad University-Birjand Branch)
Bahranmi, Seyad Hajir (Department of Textile Engineering, AmirKabir University of Technology)
Publication Information
Macromolecular Research / v.15, no.7, 2007 , pp. 605-609 More about this Journal
Abstract
The molecular interactions of polyacrylonitrile (PAN) and cellulose acetate (CA) were investigated thoroughly via dilute solution viscometry in dimethylformamide (DMF) as a common solvent at $30^{\circ}C$. The intrinsic viscosities and viscometric interaction parameters were experimentally determined for both binary (polymer/dimethylformamide) and ternary (PAN/CA/dimethylformamide) systems. As all investigated PAN/CA ternaries evidenced negative viscometric interaction parameter values $({\Delta}b\;&{\Delta}k<0)$, the existence of repulsive intermolecular interactions was deduced, and PAN/CA blends were assigned as immiscible. Moreover, the results of microscopy photograph analysis indicated that pure PAN film evidences a homophasic structure, and the size of the phase domain increases gradually with increases in CA. In DSC analysis, it was determined that the glass transition temperature of the blend film increased slightly with increases in the CA content of the blend film.
Keywords
viscometry; film; polyacrylonitrile; cellulose acetate;
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