Synthetic Additional Polymers

PolyethenePolytetrafluoroethene (PTEF)Polymethylmethacrylate (PMMA)Polypropene (PP) Polystyrene (PS) Polyvinyl chloride (PVC)

Polyethene

common name: ethylene

Polyethene

Non- biodegradable When incinerated : burns slowly with blue fla

me having a yellow tip and gives off an odour of paraffin.

Polyethene - Real object

Plastic bag Geomembranes

Polyethene – Real Object

High Density Polyethene (HDPE)

Detergent bottle Toys Water pipies

Polyethene – Real Object

Low Density Polyethene (LDPE)

Plastic container Film wrap

Polyethene - Formation

Polymerization: radical polymerization anionic addition polymerization ion coordination polymerization  cationic addition polymerization

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

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 structure ↓strong intermolecular forces as the 

instantaneous-dipole induced-dipole attraction ↓

lower tensile strength and increased ductility

melting point : 105 - 115 °C (221 - 239 °F)

excellent chemical resistance

Polymethlymethacrylate (PMMA)

Poly(methyl 2-methylpropenoate)

Polymethlymethacrylate (PMMA)

Molecular formula: (C5O2H8)n Density: 1.17-1.20g/cm3 Melting point: 160 (320 )℃ ℉ Boiling point: 200℃ PMMA swells and dissolves in many organic 

solvents glass transition temperature :105°C organic glass at room temp

Polymethlymethacrylate (PMMA) – Real object After modification with additives and fillers

 aquariums

Aircraft windows

Polymethlymethacrylate (PMMA) – Real object

Optical Fiber

lenses of exterior lights of automobiles

Polymethlymethacrylate (PMMA) - Formation emulsion polymerization solution polymerization bulk polymerization molding processes: injection molding

compression molding , extrusion. 

Polypropene

Molecular formula: (C3H6)n Density: 0.855 g/cm3, amorphous

0.946 g/cm3, crystalline Melting point: 130–171 °C (266–340 °F)

Polypropene

Polypropene –Real object

Living hinge Carpet

Polypropene – Real Objects

Polypropylene lid of a tic tacs box A polypropylene chair

Polyvinyl Chloride (PVC)

Polyvinyl chloride (PVC) – Formation

57% of its mass is chlorine suspension polymerization. incorporation of additives such as heat

stabilizers before made into finished product

Clothing cheaper than rubber waterproof coats, skiing equipment,

shoes, jackets, aprons, and bags

Polyvinyl chloride (PVC) – Real Object

Polyvinyl chloride (PVC) – Real Object

Electric wires

PVC wires

Finish

Claudy ChanCurmen Chiu

Gladys LiNatalie KwanEsther Leung