Title page for ETD etd-08192010-124830


Type of Document Master's Thesis
Author Paris, Jesse Loren
URN etd-08192010-124830
Title Carboxymethylcellulose Acetate Butyrate Water-Dispersions as Renewable Wood Adhesives
Degree Master of Science
Department Wood Science and Forest Products
Advisory Committee
Advisor Name Title
Frazier, Charles E. Committee Chair
Edgar, Kevin J. Committee Member
Roman, Maren Committee Member
Keywords
  • adhesive penetration
  • mode I fracture testing
  • Carboxymethylcellulose acetate butyrate
  • CMCAB
  • viscosity
  • wood adhesives
  • dynamic mechanical analysis
Date of Defense 2010-08-05
Availability unrestricted
Abstract
Two commercial carboxymethylcellulose acetate butyrate (CMCAB) polymers, high and low molecular weight (MW) forms, were analyzed in this study. High-solids water-borne dispersions of these polymers were studied as renewable wood adhesives. Neat polymer analyses revealed that the apart from MW, the CMCAB systems had different acid values, and that the high MW system was compromised with gel particle contaminants. Formulation of the polymer into water-dispersions was optimized for this study, and proved the “direct method”, in which all formulation components were mixed at once in a sealed vessel, was the most efficient preparation technique. Applying this method, 4 high-solids water dispersions were prepared and evaluated with viscometry, differential scanning calorimetry, dynamic mechanical analysis, light and fluorescence microscopy, and mode I fracture testing.

Thermal analyses showed that the polymer glass transition temperature significantly increased when bonded to wood. CMCAB dispersions produced fairly brittle adhesive-joints; however, it is believed toughness can likely be improved with further formulation optimization. Lastly, dispersion viscosity, film formation, adhesive penetration and joint-performance were all dependent on the formulation solvents, and moreover, these properties appeared to correlate with each other.

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