BS 2782-4 Method 451B:1978 Methods of testing plastics - Chemical properties - Determination of acetone-soluble matter in phenolic moulding materials after moulding
This method 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 finely ground samples of mouldings prepared from a phenolic moulding material.
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.
BS 2782-4 Method 451B:1978 history
1984BS 2782-2 Method 241A:1984 Methods of testing plastics - Electrical properties - Determination of effect of polyvinyl chloride compound on the loss tangent of polyethylene
1978BS 2782-1 Methods 131C and 131D:1978 Methods of testing plastics - Thermal properties - Crushing strength after heating (heat resistance) of thermosetting moulding material - Crushing strength after heating (heat resistance) of thermosetting laminated sheet or mouldings