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Top 10 List Polymer products change our life significantly

Top 10 List Polymer products change our life significantly. Ties (Synthetic rubber) Non-sticky pan (Teflon) Polyethylene Stocking (Nylon) Polystyrene PVF PMMA Silicone Rayon Piping (PVC) We will review this list in the end of this course. Synthesis. Classification of Polymerization.

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Top 10 List Polymer products change our life significantly

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  1. Top 10 ListPolymer products change our life significantly • Ties (Synthetic rubber) • Non-sticky pan (Teflon) • Polyethylene • Stocking (Nylon) • Polystyrene • PVF • PMMA • Silicone • Rayon • Piping (PVC) We will review this list in the end of this course

  2. Synthesis

  3. Classification of Polymerization • Carothers method / Reaction stoichiometric classification • Condensation vs addition polymerization • Determined by loss of weight (or not) on polymerization • Condensation: • mass of final polymer < mass of monomers • Small molecules lost (eg H2O or HCl) during polymerization • Addition: • Mass unchanged • Typically have higher MW and narrower MW distributions • This method is not sufficient. • Examples:

  4. Type of Condensation Reactions • Elimination of H2O • Di-carboxylic acid + di-hydroxyl • Di-amino + Di-carboxylic acid • Di-functional monomer • Transestification –carboxylic acid ester + alcohol • Cyclization-type such as polyimide See page 30 – Allcock book

  5. High-performance polymers prepared by polycondensation • Polycarbonate • Polyethersulphone • Polyetheretherketone • Poly(p-phenylene terephthalamide) • Polyimide Main applications, Tg and modulus

  6. Examples – condensation ) • Polyester • Polycarbonate • Polyethersulphone • Polyetheretherketone • Poly(p-phenylene terephthalamide) • Polyamide • Polyimide • Polyanhydrides • Polybenzimidazoles • PPQ polyquinoxalines Homework: Main applications, Tg and modulus, issues

  7. PET • Transestification rxn – low solubility and high Tm of terephthalic (sublimes at 573K)

  8. Polyamide (nylon)

  9. Polyaddition • Polyurethanes (RA2 + RB2) • Diisocyanates with diols • Polyureas (RA2 + RB2) • Diisocyanates with diamine

  10. Classification of Polymerization

  11. Classification of Polymerization • Mechanistic classification: • Step-growth (step reaction) vs Chain-growth (chain-reaction)

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