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Soy-Based UV Resistant Polyurethane Pultruded Composites: Phase II - Report
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2012-02-02
[PDF-502.21 KB]
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Alternative Title:Soy-Based UV Resistant Polyurethane Pultruded Composites
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Abstract:Aliphatic polyurethane (PU) nanocomposites were synthesized using organically modified nanoclays. X-Ray diffraction results confirmed good exfoliation of nanoclay particles in the PU resin system. With the addition of just 1% of nanoclay in the base resin, PU nanocomposites showed significantly higher strength and modulus. Soy-PU resin system with increased soy content (30% Soy-PU) was obtained from Bayer Material Science. Neat resin samples were manufactured using the aliphatic and aromatic 30% Soy-PU resin system. Results show that there is no significant change in the glass transition temperature for the Soy-PU with 30% soy content when compared to the 20% Soy-PU and base PU resin systems. Glass fiber reinforced polyurethane composites were manufactured using aromatic 30% Soy-PU resin system and modified pultrusion process. Low velocity impact tests were conducted on the pultruded PU composites. Results indicate that increase in the soy content in PU resin system does not result in the degradation of composite properties. Incorporation of pigments during the pultrusion of PU composites was also studied. Pigments such as zinc oxide and zinc sulphide (ZnS) were studied to obtain the required “white” coloration to the PU composites. ZnS was chosen for the pultrusion process due to its low corrosive property. Pigmented pultruded composites were manufactured using the base PU resin and ZnS. Soy based, pigmented pultruded PU composites manufactured during this study will have higher UV resistance and comparable mechanical properties when compared to the conventional PU pultruded composites. These Soy-based composites will find numerous applications in the automotive, marine and housing industries.
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