The nucleophilic substitution with C6H5SNa, at -30°C, is compared for five PVC samples with various contents of isotactic triads. The conversion curves consist of a very fast stage followed by a steady one. All the samples are found to behave in the same way except for the content of the structures involved in the fast period. This content is estimated by extrapolating the straight lines of the steady stages to zero time. The obtained values are found to be a linear function of the content of isotactic triads. The results, together with some earlier ones, allow for the content of the labile non-defect structures in PVC to be determined.
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W.H.Starnes,Jr., Dev.Polym.Degradation,3, 135 (1981) and references cited therein.
G.Martínez, C.Mijangos and J.Millán, J.Macromol.Sci.Chem.,A17, 1129 (1982).
J.Millán, G.Martínez and C.Mijangos, accepted for publication in J.Polym.Sci.
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G.Martínez, C.Mijangos and J.Millán, accepted for publication in Eur.Polym.J.
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Martínez, G., Mijangos, C. & Millán, J. Quantitative determination of non-defect unstable structures in PVC through selective nucleophilic substitution with C6H5SNa. Polymer Bulletin 13, 151–154 (1985). https://doi.org/10.1007/BF00254224
- Linear Function
- Material Processing
- Quantitative Determination