A quaternary ammonium salt compound with a long chain of 12 carbon atoms was synthesized and used as an antistatic agent to be added into plasticized poly(vinyl chloride) (PVC), and the structure and properties of such PVC materials were studied by surface resistivity, mechanical property and scanning electronic microscope tests. The results show that with the content of the synthetic compound increasing, the surface resistivity of PVC materials was decreased. When the content of the synthetic compound reached 4.5%, the surface resistivity of PVC materials was reduced below 3.0×10⁸ Ω. When a small amount of poly(ethylene oxide) was added, the surface resistivity of PVC materials was not sensitive to atmospheric humidity and was further reduced, and the tensile strength and break elongation of PVC, however, were improved.

Key words: quaternary ammonium salt, plasticized poly(vinyl chloride), surface resistivity, antistatic performance, poly(ethylene oxide)