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Polymer Parameters

Explore the intricate details of polymer parameters including structure, composition, morphology, and additives, impacting properties like glass transition temperature, boiling point, and mechanical behavior. Discover the significance of cost, topology, and sequence distribution in polymer applications.

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Polymer Parameters

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  1. Polymer Parameters • Chemical structure • Chemical composition and distribution • Sequence length and distribution • Molecular weight and distribution • Chain isomerism • Morphology • Topology • Additives • Cost

  2. Amorphous Morphology Glass Transition Temperature • - 80 °C • - 20 °C • 105 °C • 290 °C

  3. Structure-Property Relationships Boiling Point Formula Weight • 46 g/mol • 46 g/mol Boiling Point Formula Weight • 86 g/mol • 188 g/mol

  4. Structure-Property Relationships Tm (°C) ΔG = ΔH — T ΔS

  5. PE vs PTFE

  6. Structure-Property Relationships Tg (°C) Tm (°C) Tm (°C)

  7. Polymer Parameters • Chemical structure • Chemical composition and distribution • Sequence length and distribution • Molecular weight and distribution • Chain isomerism • Morphology • Topology • Additives • Cost

  8. Topology • Soluble and melt processable • Linear • Branched • Long chain • Short chain

  9. Topology

  10. Topology • Network • Insoluble • Intractable • No flow with heat and pressure • aka • Gel, cured, vulcanizate, thermoset, crosslinked • Examples • Rubber, epoxy glue, etc

  11. Mechanical Properties

  12. Effect of Branching on Melting Transitions of PEs

  13. Polymer Parameters • Chemical structure • Chemical composition and distribution • Sequence length and distribution • Molecular weight and distribution • Chain isomerism • Topology • Morphology • Additives • Cost

  14. Additives • Plasticizers • PVC • Tg ≈ 80 °C • Tg ≈ ? °C w/ 2% DOP • Stabilizers • Processing temperature • Operating temperature • Properties • MW • Brittleness • Discoloration • Cross-linking

  15. Additives • Anti-oxidants • Flame retardants • Colorants • Dyes • Fillers • Carbon black: UV screen, enhance modulus • Fibrous reinforcers: glass, carbon, polymeric, ceramics • Economic performance fillers: Saw dust, dirt, etc! • Blowing agents • Lubricants

  16. Polymer Parameters • Chemical structure • Chemical composition and distribution • Sequence length and distribution • Molecular weight and distribution • Chain isomerism • Topology • Morphology • Additives • Cost

  17. Cost • Application dependent • Feedstock dependence • Raw materials cost • Recycle vs new • GDP independence? • Process improvements • COO • Environmental issues • Catalysts • Automation/sensors

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