Among the polypropylene types, the most interesting one is isotactic polypropylene, a semi-crystalline polymer characterised by high tensile strength, low density, and good thermal and abrasion resistance.
Polypropylene (or polypropene, abbreviated to PP) is a thermoplastic polymer that can exhibit various tactical properties. The most commercially attractive product is isotactic polypropylene: it is a semi-crystalline polymer characterised by high tensile strength, low density, and good thermal and abrasion resistance.
The density of isotactic polypropylene is 900 kg/m³, and the melting point is often above 165 °C. Chemical properties determined during production include stereoregularity, molecular mass, and polydispersion index. On the other hand, the atactic product has a rubbery appearance and little commercial interest (it has only been used as an additive).
The quality of polypropylene grades has improved over the years and will continue to do so in the near future. The latest technical developments have created more rigid, clear and transparent grades and have conquered market spaces that were previously the preserve of other polymers such as ABS and PS.
PP is used in many applications, but its ability to act as a hinge effect for CD/DVD closures and containers sets it apart.
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