Structure and properties of poly(vinyl chloride)-triallyl cyanurate plastisols

Triallyl cyanurate (TAC) has been used as a reactive plasticizer to promote the high-temperature creep resistance of poly(vinyl chloride) (PVC) plasti sols. The resultant crosslinked structure is characterized using gel conten t and swell ratio measurements as well as Fourier transform infrared spectr oscopy. The crosslinking reaction was initiated using peroxide. The effect on the network structure of using a free radical scavenger in the formulati on has also been studied. The gel yield and crosslink density in the gel in crease with increasing TAC concentration in the plastisol, while the grafte d PVC fraction and the residual unsaturation of TAC behave in the opposite way. Introduction of TAC into the plastisol promotes creep resistance at hi gh temperatures, and the logarithmic creep rate was found to decrease linea rly with increasing crosslink density.