Equations of State for Chain Homopolymers in High Pressure

This paper gives a set of equations of state for chain homopolymers on the ba-sis of the quasi-harmonic osciltator model.The calculation results are in good agreementwith the experiment in high pressure and wide temperature range. The results showed thatthe contribution of mers motion for pressure is larger than that of mutual interaction amongmers,and there is a simple ratio between them.