Type of Document Master's Thesis Author Burtoff, Chuck URN etd-11152013-040504 Title Surface analysis of sheet molded composite (SMC) material as related to adhesion Degree Master of Science Department Chemistry Advisory Committee
Advisor Name Title John G. Dillard Committee Chair H. Brinson Committee Member J. P. Wightman Committee Member Keywords
- Composite materials
Date of Defense 1986-04-05 Availability restricted AbstractThe surface chemical properties of Sheet Molded Composite (SMC)
materials, formulated to contain polyester binder, calcium carbonate
filler, and glass fibers, have been investigated with emphasis on how
the surface properties are related to adhesion. These surface
properties, relative elemental concentrations and their chemical states,
were studied using x-ray photoelectron spectroscopy (XPS) before and
after a series of surface treatments as well as after mechanical lap
shear fracture tests for SMCs bonded with urethane adhesive. Surface
chemical functionalities, including -C-0·R(X)/-NCO2R and -C=0 (ester
carbonyl) groups, were found to promote good adhesion using urethane
adhesives. These chemical functionalities_were particularly enhanced
after treating the SMC surface with an isocyanate primer as well as
after a solvent/abrasive surface pretreatment done with a Scotch Brite
abrasive pad soaked in methylene chloride and after washing the SMC
surfaces with hot aqueous chemicals at high pressures.
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