1. Synthetic Additional Polymers Polyethene Polytetrafluoroethene (PTEF) Polymethylmethacrylate (PMMA) Polypropene (PP) Polystyrene (PS) Polyvinyl chloride (PVC)

2. Polyethene common name: ethylene

3. Polyethene Non- biodegradable When incinerated : burns slowly with blue flame having a yellow tip and gives off an odour of paraffin.

4. Polyethene - Real object Plastic bagGeomembranes

5. Polyethene – Real Object High Density Polyethene (HDPE) Detergent bottle Toys Water pipies

6. Polyethene – Real Object Low Density Polyethene (LDPE) Plastic containerFilm wrap

7. Polyethene - Formation Polymerization: Polymerization radical polymerization anionic addition polymerization ion coordination polymerization cationic addition polymerization

8. High Density Polyethene (HDPE) density of greater or equal to 0.941 g/cm3 low degree of branching strong intermolecular forces & tensile strength Catalysts: chromium, silica melting point :120 - 130 °C (248 - 266 °F) excellent chemical resistance

9. Low Density Polyethene (LDPE) density range of 0.910–0.940 g/cm3. high degree of short and long chain branching chains do not pack into the crystal structurecrystal structure ↓strong intermolecular forces as the instantaneous- dipole induced-dipole attraction ↓instantaneous- dipole induced-dipole attraction lower tensile strength and increased ductilitytensile strength ductility melting point : 105 - 115 °C (221 - 239 °F) excellent chemical resistance

10. Polymethlymethacrylate (PMMA) Poly(methyl 2-methylpropenoate)

11. Polymethlymethacrylate (PMMA) Molecular formula: (C5O2H8)nCOH Density: 1.17-1.20g/cm3 Melting point: 160 ℃ (320 ℉ ) Boiling point: 200 ℃ PMMA swells and dissolves in many organic solventssolvents glass transition temperature :105°C glass transition temperature organic glass at room temp

12. Polymethlymethacrylate (PMMA) – Real object After modification with additives and fillers aquariums Aircraft windows

13. Polymethlymethacrylate (PMMA) – Real object Optical Fiber lenses of exterior lights of automobiles

14. Polymethlymethacrylate (PMMA) - Formation emulsion polymerization solution polymerization bulk polymerization molding processes: injection molding compression molding, extrusion. injection molding compression moldingextrusion

15. Polypropene

16. Molecular formula: (C3H6)n Molecular formula Density: 0.855 g/cm3, amorphous Density 0.946 g/cm3, crystalline Melting point: 130–171 °C (266–340 °F) Melting point Polypropene

17. Polypropene – Real object Living hinge Carpet

18. Polypropene – Real Objects Polypropylene lid of a tic tacs box A polypropylene chair

19. Polyvinyl Chloride (PVC)

20. Polyvinyl chloride (PVC) – Formation 57% of its mass is chlorine suspension polymerization. incorporation of additives such as heat stabilizers before made into finished product

21. Clothing cheaper than rubberrubber waterproof coats, skiing equipment, shoes, jackets, aprons, and bagsjacketsaprons Polyvinyl chloride (PVC) – Real Object

22. Electric wires PVC wires

23. Finish Claudy Chan Curmen Chiu Gladys Li Natalie Kwan Esther Leung