EFFECT OF THE DMP CONCENTRATION ON THE THERMAL-DECOMPOSITION BEHAVIOROF PLASTISOLS FROM A COMMERCIAL PVC RESIN

The thermal decomposition behaviour of different PVC plastisols, deriv ed from a commercial PVC resin and DMP, has been studied by thermograv imetry. The results are compared with those corresponding to the resin and the plasticizer by themselves. The appearance of a new phase, a t ype of plasticized PVC, can be clearly observed as a consequence of th e interaction between the resin and the plasticizer. The behaviour of the three phases observed (i.e. plasticizer, plasticized PVC and resin ) has been studied as a function of the plasticizer concentration and the heating rate, and remarkable differences have been noticed. (C) 19 97 Elsevier Science Limited.