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Investigation of CNSL-Based Hybrid Sol in Conventional Polymeric Material

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The performance properties of conventional polymeric material have been investigated by modifying it with cashew nut shell liquid (CNSL) derived hybrid precursor. The synthesis of hybrid material involved formation of maleic anhydride adduct of CNSL followed by silane modifi cation and subsequent hydrolysis and condensation with tetra ethyl orthosilicate. The developed hybrid material was characterized by a number of instrumental techniques like FT-IR, 1H-NMR and 13C-NMR, as reported in our earlier work. In the present work, we have investigated the effect of CNSL-based hybrid material on the performance properties of conventional alkyd-melamine formaldehyde-based stoving system. The synthesized material was used as a modifi er at various concentrations (15, 30 and 50 wt% of alkyd resin). The developed coating formulations were applied on mild steel and cured at 120 °C for 30 minutes. Further, the completely cured coatings were evaluated for optical, thermal, mechanical, chemical and solvent resistance properties, hydrolytic stability, UV resistance, corrosion resistance, morphological behavior and elemental distribution properties. The study conducted showed that incorporation of CNSL-based hybrid materials improved overall performance properties by forming crosslinked silane network within the material along with strong metal-oxygen-silicon covalent bond at metal coating interface.
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Document Type: Research Article

Publication date: 06 April 2016

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