BS EN 60450-2004 新旧纤维素电绝缘材料聚合的平均粘度测量

标准号：BS EN 60450-2004
中文标准名称：新旧纤维素电绝缘材料聚合的平均粘度测量
英文标准名称：Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials
标准类型：K15
发布日期：2004/8/16 12:00:00
实施日期：2004/8/16 12:00:00
中国标准分类号：K15
国际标准分类号：17.220.99; 29.035.01
引用标准：IEC 60814;ISO 287;ISO 3105
适用范围：This International standard describes a standardized method for the determination of theaverage viscometric degree of polymerization ( DPν ) of new and aged cellulosic electricallyinsulating materials. It may be applied to all cellulosic insulating materials such as those usedin transformer, cable or capacitor manufacturing.The methods described can also be used for the determination of the intrinsic viscosity ofsolutions of chemically modified kraft papers, provided that these dissolve completely in theselected 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 sothat the mean value measured by viscometric methods is not necessarily the same as that which may be obtainedby, for instance, osmotic or ultra centrifuging methods.