標準號：BS 2782-4 Method 451A-1978
中文標準名稱：塑料試驗方法.第4部分:化學性能.酚醛模制件的丙酮可溶物的測定
英文標準名稱：Methods of testing plastics - Chemical properties - Determination of acetone-soluble matter in phenolic mouldings
標準類型：G31
發(fā)布日期：1978/5/31 12:00:00
實施日期：1978/5/31 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.10
適用范圍：This International Standard specifies a gravimetric method for the determination of the amount of matter that can be extracted by acetone, at a temperature near its boiling point, from a finely ground sample of a phenolic moulding. The test for acetone-soluble matter is one means for determining the relative degree of cure of phenolic mouldings made from a given material. The process of extraction is carried out under specified conditions for a specified time. Although a high proportion of soluble matter is determined, extraction is not necessarily complete. The results are only comparative, because the extracted material normally contains substances other than any undercured resin that may be present, for example lubricants, colouring matter and plasticizers.