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Comparative study on activation rate constants for some styrene/nitroxide systems
Author(s) -
Goto Atsushi,
Fukuda Takeshi
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20001101)201:16<2138::aid-macp2138>3.0.co;2-1
Subject(s) - nitroxide mediated radical polymerization , steric effects , chemistry , styrene , activation energy , polystyrene , polar , polymer chemistry , reaction rate constant , entropy of activation , adduct , photochemistry , computational chemistry , radical polymerization , organic chemistry , kinetics , polymerization , physics , quantum mechanics , astronomy , copolymer , polymer
The activation rate constants k act of some polystyrene (PS) – nitroxide adducts were determined as a function of temperature by the GPC peak resolution method. The results showed that both the steric and polar factors associated with the structure of the nitroxides strongly affect the magnitude of k act . Steric factors contribute significantly to the entropy of the reaction, while polar factors take part in the C—O bond energy.