This British Standard describes a method for measuring the rate of loss of styrene from contact moulded materials using unsaturated polyester resins and glass fibre chopped strand mats, with a surface open to the atmosphere.
BS 2782-4 Method 432D:1995 history
1995BS 2782-4 Method 432D:1995 Methods of testing plastics - Chemical properties - Determination of styrene evaporation from unsaturated polyester resins