The Thermal Degradation of Poly(dimethyl Itaconate-co-4-vinylpyridine)
Copolymers of dimethyl itaconate (DMI) and 4-vinylpyridine (4VP) were synthetized in toluene at 60°C with0.26 mol% of AIBN as initiator. Their compositions were determined by differential refractometry and by differential scanning calorimetry. The 4VP contents of the copolymer samples ranged between 7 and 75 mol%. The reactivity ratios calculated via the Fineman-Ross method were r 1=0.24 (DMI) and r 2=0.57 (4VP).
The thermal degradations of these copolymers were studied. The results of thermogravimetric measurements indicated that the copolymers degrade at lower temperatures than those of their parent homopolymers. A possible explanation of this anomalous behaviour is the formation of thermally unstable structures during the copolymerisation.
Unable to display preview. Download preview PDF.
- 1.N. Grassie, Polymer Science. A Materials Science Handbook, Vol. 2, North Holland 1972, p. 59.Google Scholar
- 6.N. Grassie and G. Scott, Polymer Degradation and Stabilization, Cambridge Univ. Press, Cambridge 1988, p. 24.Google Scholar
- 10.N. Grassie and E. Vance, Trans. Faraday Soc., 49 (1953) 181.Google Scholar
- 11.P. Cacioli, G. Moad and E. Rizzardo, Polym. Bull (Berl.), 11 (1975) 325.Google Scholar