標準號：ISO 16152-2005
中文標準名稱：塑料.聚丙烯中二甲苯可溶物測定
英文標準名稱：Plastics - Determination of xylene-soluble matter in polypropylene
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.01
適用范圍：1 This International Standard specifies a method for determining the mass fraction of a polypropylene homopolymer or copolymer which is soluble in xylene at 25 ℃. 2 A weighed amount of dried sample is dissolved in xylene under reflux conditions, then cooled under controlled conditions and maintained at 25 ℃ to ensure controlled crystallization of the insoluble fraction. 3 The xylene-soluble fraction is then recovered by evaporation of the xylene and determined by weighing the residue. 4 Other materials with solubilities similar to that of the xylene-soluble fraction, such as additives, may interfere with the determination.