標準號：ISO 1599-1990
中文標準名稱：塑料 乙酸纖維素 模塑時粘度降低的測定
英文標準名稱：Plastics; cellulose acetate; determination of viscosity loss on moulding
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1990/12/1 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.20
適用范圍：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.