Abstract
We present experimental and theoretical studies of the vibrational properties of two similar polymers containing phenyl rings: poly(p-phenylene)sulfide (PPS) and poly(p-phenylene)oxide (PPO). We have investigated these compounds by using the Resonant Raman Scattering (RRS) technique associated with infrared absorption. Using Valence-Force-Field calculations, we have built a dynamical model to assign correctly the different modes. As performed in other polymers, in order to obtain a better determination of the force constants, our procedure includes model compounds which are in this case; Benzene, Diphenylsulfide (DPS) for PPS and Diphenylether (diphenyloxide or DPO) for PPO. A good agreement is obtained between calculated and experimental data, despite some assumptions in the calculations.
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