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Polyethylene- Polyethylene is most the high polymer with simple structure, also be the high polymer data with the most extensive application. Be joined by reduplicative –CH2– unit and it is become. Polyethylene is to pass ethylene...
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PS- hard glue - polystyrene- Abbreviation PS Common weighs hard glue, common hard glue Formal name polystyrene English name General Purpose Polystyrene Monomer styrene---By oil complex a kind of colorless liquid Specific gravity: 1.05 is overcome / cubic cent...
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