Abstract: The gelation property of environmental-friendly PVC plastisols was measured by torque rheometer and rotary viscometer. The effect of PVC resin, plasticizer, and blending resin on the gelation time were investigated. High molecular weigh or round shaped resin resulted in long gel time, whereas sheet shaped resin gave short gel time. The higher the compatibility between the resin and plasticizer, the shorter the gel time. The gel time increased with increasing loading of blending resin. When the loading of blending resin was 40phr, the gel time was 28 min, which contrasted to 18 min of the neat system.

Key words: plastisol, poly(vinyl chloride), gelation