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3 Cards in this Set
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- Back
- 3rd side (hint)
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Comparison of Plastics: Thermoplastics vs Thermosettings |
- Formed by Polymerisation: Addition/Condensation -Linear w/ No Cross Links/ 3D w/Number of Cross Links -Monomers: bifunctional/poly functional -Molecular Weight: Low/High -Soft, Weak, Less Brittle/Hard, Strong, More Brittle -Solubility in Organic Solvents: Yes/No -Examples: PVC, PVA/Phenolformaldehyde, Nylon 6:6 |
On the basis of Polymerisation, Cross Links, Monomers, Molecular Weight, Physical Properties, Solubility, Examples. |
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Compounding of Plastics: |
Binders (Resins) - Hold Constituents together Fillers/Extenders - impart better tensile strength, hardness, finish, workability, opacity etc. Pigments/Dyes Catalysts/Accelerators Plasticizers - increase the plasticity Lubricants - Impart flawless ness, glossy finish Stabilizers - improve thermal stability |
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Fabrication/Moulding of Plastics |
Compression, Transfer - Thermosets Injection, Extrusion - Thermoplasts |
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