Radical polymerization of methacrylic acid in the presence of poly(4‐vinylpyridine) in methanol
1979; Wiley; Volume: 180; Issue: 7 Linguagem: Inglês
10.1002/macp.1979.021800712
ISSN0025-116X
Autores Tópico(s)Polymer Science and PVC
ResumoAbstract The rate of radical polymerization of methacrylic acid (MA) was found enhanced in the presence of poly(4‐vinylpyridine) (P4VP) of various molecular weights (M̄ η ) in methanol. The rate maximum shifted from 1 : 1 mole ratio of [P4VP]/[MA], based on the repeating units, to a larger polymer‐monomer ratio and also the rate enhancement was smaller, when P4VP of smaller M̄ η was used. The overall energy of activation was 36,1 and 60,7 kJ/mol in the presence and absence of P4VP, respectively. The M̄ η of poly(methacrylic acid) (PMA) prepared with P4VP was about 10 times larger than the M̄ η of PMA prepared without P4VP.
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