In this study, we propose an infrared spectrometry technique to determ
ine the copolymer composition. Polysulfones are copolymerized by acryl
amide and sulfur dioxide at various conditions. The copolymer's compos
ition is measured as a function of the ratio of the absorbance of the
CH2 group (1423 cm(-1)) to the absorbance of the SO2 group (1305 cm(-1
)). Using this linear relation, the copolymer composition can be easil
y determined without repeating the experiment of an element analysis i
n the range of 2.83-11.96. Experimental results confirm that this tech
nique applied to poly(styrene sulfone) is valid for the copolymer in t
he range of 1.27-5.25. The data and the linear relationship correlate
well with each other. (C) 1997 Elsevier Science Ltd.