Volume 74, Issue 2 pp. 448-457

Multiphase materials with lignin. XV. Blends of cellulose acetate butyrate with lignin esters

Indrajit Ghosh

Indrajit Ghosh

Biobased Materials/Recycling Center and Department of Wood Science and Forest Products, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

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Rajesh K. Jain

Rajesh K. Jain

Biobased Materials/Recycling Center and Department of Wood Science and Forest Products, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

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Wolfgang G. Glasser

Corresponding Author

Wolfgang G. Glasser

Biobased Materials/Recycling Center and Department of Wood Science and Forest Products, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

Biobased Materials/Recycling Center and Department of Wood Science and Forest Products, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061===Search for more papers by this author

Abstract

Commercially available cellulose acetate butyrate (CAB, unplasticized) was blended in melt and solution with lignin esters having different ester substituents—acetate (LA), butyrate (LB), hexanoate (LH), and laurate (LL). All lignin esters formed phase-separated blends with CAB with domain size depending on processing conditions and the interaction between phases depending on blend components. CAB/LA and CAB/LB revealed the strongest interactions with domain sizes on the 15–30 nm scale as probed by dynamic mechanical thermal analysis and differential scanning calorimetry. The glass transitions (Tg) followed the Fox equation. Broader transitions corresponding to the Tgs of the two parent components were observed for CAB blends with LH and LL. Transmission electron micrographs revealed differences in the phase dimensions of the blends in accordance with chemical and processing (i.e., melt vs solvent) differences. Modest gains in modulus were observed for low contents (<20 wt %) of LA and LB. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 448–457, 1999

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