Norm

NEN-EN-IEC 60450:2004 en;fr

Meting van de gemiddelde viscometrische graad van polymerisatie van nieuwe en verouderde cellulose, elektrische isolerende materialen

Volledig inclusief:

108,02

Over deze norm

Status Definitief
Aantal pagina's 45
Commissie Isolatiesystemen
Gepubliceerd op 01-07-2004
Taal Engels, Frans
Describes a standardized method for the determination of the average viscometric degree of polymerization (DPv) of new and aged cellulosic electrically insulating materials. It may be applied to all cellulosic insulating materials such as those used in transformer, cable or capacitor manufacturing. The methods described can also be used for the determination of the intrinsic viscosity of solutions of chemically modified kraft papers, provided that these dissolve completely in the selected solvent. Caution should be taken if the method is applied to loaded kraft papers. Note: Within a sample of material, all the cellulose molecules do not have the same degree of polymerization so that the mean value measured by viscometric methods is not necessarily the same as that which may be obtained by, for instance, osmotic or ultra centrifuging methods. Experience has indicated the need for improved description of the experimental method. It describes a revised procedure that overcomes the limitations of the first edition.

Details

ICS-code 29.035.10
Nederlandse titel Meting van de gemiddelde viscometrische graad van polymerisatie van nieuwe en verouderde cellulose, elektrische isolerende materialen
Engelse titel Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials
Gewijzigd door

Winkelwagen

Subtotaal:

Ga naar winkelwagen