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    Author(s): Timothy G. Rials; Wolfgang G. Glasser
    Date: 1989
    Source: Journal of Applied Polymer Science 37:2399-2415
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.9 MB)

    Description

    Polymer blends of hydroxypropyl cellulose (HPC) and organosolv lignin (OSL) were prepared by mixing in solutions of both pyridine and dioxane, and casting as films, and by mixing in the melt followed by extrusion. All preparations exhibited partial miscibility as evidenced by a single Tg up to a composition of 40 wt % lignin above which phase separation was detected. Dioxan-cast and injection-molded blends were distinguished from the pyridine-cast materials by a positive Tg deviation from additivity, an approximation which adequately described the latter. This positive deviation in Tg is attributed to the formation of a liquid-cryatal mesophase with a resultant reduction of amorphous HPC available for interaction with the lignin component.

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    Citation

    Rials, Timothy G.; Glasser, Wolfgang G. 1989. Multiphase materials with lignin. IV. Blends of hydroxypropyl cellulose with lignin. Journal of Applied Polymer Science 37:2399-2415

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