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4. Control and designation
4.1 Characterization and control methods
Measurement of structural parameters and rheological properties
The structural parameters of PP can be measured by various methods:
the molar masses in number and mass and their I p ratio are measured by gel permeation chromatography;
the isotacticity rate is equal to the mass fraction of PP insoluble in boiling n-heptane;
the degree of crystallinity is assessed by differential scanning calorimetry (DSC), density measurement or X-ray measurement.
Melt rheological properties are characterized...
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Control and designation
Applications
Statistical and economic data
1.Production trends
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France
In thirty years, French polypropylene production has risen from zero to 1.4 Mt/year (figure ).
References
Also in our database
Norms and Standards
French and European standards http://www.afnor.fr
- Plastics – Determination of water absorption. Classification number T 51-166 - NF EN ISO 62 - 05-99
- Plastics – Test methods for determining the effects of immersion in liquid chemicals. Classification number T 51-029 - NF EN ISO 175 - 09-00
- Plastics – Determination of bending properties. Classification number T 51-001 - NF EN ISO 178 - 05-03 ...
Websites
List of polypropylene suppliers http://www.ides.com/generics/PP/PP_suppliers.htm
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
Borealis http://www.borealisgroup.com
DOW Plastics http://plastics.dow.com
Exxon Mobil http://www.exxonmobilchemical.com
...
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