ISO 1599-1990 塑料 乙酸纤维素 模塑时粘度降低的测定

标准号：ISO 1599-1990
中文标准名称：塑料 乙酸纤维素 模塑时粘度降低的测定
英文标准名称：Plastics; cellulose acetate; determination of viscosity loss on moulding
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1990/12/1 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
适用范围：This method is suitable for cellulose acetate which does not contain additives, fillers, etc. which may interfere with the determination of viscosity. It is suitable for cellulose acetate having an acetic acid yield above 50 %. Cellulose acetate plasticized with dimethyl phthalate is moulded under specified conditions of temperature, pressure and time. After cooling, the moulding is ground up. The viscosity ratio of the ground material from the moulding and also that of the original cellulose acetate material are determined in accordance with ISO 1157. The percentage viscosity loss is calculated from the values of viscosity before and after moulding. This second edition cancels and replaces the first edition ISO 1599:1975.