polymer fillers 1-8-08 - Paints Stains Antioxidants These...

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1 Polymer Additives and Compounding Douglas J. Gardner Professor Wood-Polymer Hybrid Composites Additive Ingredients • Reinforcing fillers • Inert fillers • Plasticizers and lubricants • Foaming Agents • Colorants • Antioxidants • UV Absorbers • Biocides • Fire-retardants
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2 Reinforcing Fillers • These improve tensile strength, tear strength or composite modulus – Carbon black – Silica –G la s s – Wood fiber – Nanofillers Inert Fillers • May not change final properties of the polymer, but make the polymer easier to process and lower cost.
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3 Plasticizers and Lubricants • Petroleum-based oils • Fatty acids •E s t e r s • Waxes Foaming Agents • Reduce density • Physical Foaming agents –CO 2 –N
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4 Colorants •P i gm e n t s
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Unformatted text preview: Paints Stains Antioxidants These generally act as free radical sinks and thus stop the chain reactions in oxidation 5 UV-Absorbers Biocide Additives-WPC Borates Results of published work in the literature Isothiazolone Etc. Companies are now adding moldicides Correct Deck Work in progress 6 Fire-retardants Inorganic ammonium or diammonium phosphate borates zinc chloride Organic polymers and resins halogenated and organophosphorous compounds Compounding Dry blending and mixing Ribbon blenders Speed Mixer High Shear Mixing Kady Mill Cowles dissolver Melt Mixing Brabender Thermo-Haake 7 Measuring Dispersion Visual Light microscopy Electron microscopy TEM SEM Atomic force microscopy X-ray diffraction...
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This note was uploaded on 12/21/2010 for the course AEWC 430 taught by Professor Dg during the Fall '08 term at University of Maine Orono .

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polymer fillers 1-8-08 - Paints Stains Antioxidants These...

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