Non-isothermal degradation of poly(vinyl chloride) /methylmethacrylate-butadiene-styrene blends

The thermal degradation of poly(vinyl chloride) /methylmethacrylate- butadiene-styrene (PVC/MBS) blends was studied by non-isothermal thermogravimetry in nitrogen. Measurements were carried out in the temperature range 323-823 K. The kinetic parameters were determined by applying Flynn-Wall- Ozawa and Kissinger's methods. According to the compensation parameters the mechanism of degradation remains the same on adding the MBS; only the kinetics change. The thermal stability of the blends depends on the blend composition and shell/core ratio in MBS.