Viscoelastic and thermal properties of linseed oil-based ceramer coatings

Dynamic mechanical thermal analysis (DMTA) was used to determine the crossl ink density and glass transition temperature of various ceramer coatings. T he metal-oxide ceramer coatings were developed using linseed oil as the org anic phase with titanium isopropoxide, and zirconium propoxide as the inorg anic sol-gel precursors. The viscoelastic characteristics and tensile prope rties were investigated as a function of sol-gel precursor type and content . The phase, morphology, and thermal decomposition of these ceramer coating s were evaluated using small-angle X-ray scatterings (SAXS), and thermal gr avimetric analysis (TGA), respectively. The sol-gel precursor type and cont ent were found to effect the crosslink density, glass transition temperatur e, and tensile modulus. The morphology of these ceramer coatings was found to primarily depend on sol-gel precursor concentration. TGA revealed that t he thermal history of the ceramer coatings also depended on sol-gel precurs or concentration.