F. Dywan et al., NONDESTRUCTIVE DETERMINATION OF THE RESIDUAL MONOMER CONTENT IN POLYMERS BY RAMAN-SPECTROSCOPY, Die Makromolekulare Chemie, 194(6), 1993, pp. 1527-1536
By a comparative study and by calibration, Raman spectroscopy is estab
lished as a non-destructive method for the determination of the monome
r concentration in solid poly(methyl methacrylate) samples. Although t
he effect of the internal field on the refractive index and on the Ram
an intensity of a polymer solution in a monomer is considered, the Ram
an scattering cross section of the carbonyl stretching vibration of th
e monomer turns out to be more than twice as large as that of the poly
mer.