1. Preparation
1.1 Polypropylene structure
Polypropylene is one of the four main thermoplastics, along with polyethylene, polystyrene and polyvinyl chloride, with a tonnage representing 21% of total plastics.
The name polypropylene actually conceals a whole range of materials. At the very least, we can distinguish between homopolymers, copolymers and compounds. A homopolymer is prepared by chemically bonding identical units, in this case propylene. A copolymer is an assembly of several monomers, generally propylene and ethylene, in variable proportions and modes. Compounds are more or less complex mixtures.
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Preparation
Properties
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1.Production trends
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France
In thirty years, French polypropylene production has risen from zero to 1.4 Mt/year (figure ).
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