Synthetic Additional Polymers Polyethene Polytetrafluoroethene (PTEF) Polymethylmethacrylate (PMMA)...
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Transcript of Synthetic Additional Polymers Polyethene Polytetrafluoroethene (PTEF) Polymethylmethacrylate (PMMA)...
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