Summary
Tacticity dependence of thermal stability of poly(methyl methacrylate)s was examined under nitrogen by differential scanning calorimetric analysis using the isotactic PMMAs prepared with t-C4H9MgBr and syndiotactic PMMAs prepared with t-C4H9Li-(C2H5)3Al (Al/Li=3), which had the same chemical structure from α-end to ω-end and similar molecular weights. As the molecular weight became smaller, the degradation temperatures of both the isotactic and syndiotactic PMMAs became higher. The syndiotactic PMMAs showed higher degradation temperatures than the isotactic ones with similar molecular weights.
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Kitayama, T., Horii, H., Hatada, K. et al. Tacticity dependence of thermal degradation of PMMAs with the same chemical structure. Polymer Bulletin 21, 433–437 (1989). https://doi.org/10.1007/BF01045181
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DOI: https://doi.org/10.1007/BF01045181