Free radical copolymerization behavior of myrcene |
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Authors: | David L. Trumbo |
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Affiliation: | (1) S. C. Johnson Polymers, S. C. Johnson and Son, Inc., 1525 Howe Street, 53403-5011 Racine, WI, USA |
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Abstract: | Summary Myrcene (7-methyl-3-methylene-1,6-octadiene) binary copolymers with styrene, methyl methacrylate or p-fluorostyrene were synthesized. Polymer compositions were measured by H-NMR and reactivity ratios were calculated using a nonlinear least squares error-in-variables method. For myrcene-styrene copolymerizations the polymer radicals have a marked preference for myrcene monomer. In the case of the myrcene-MMA copolymerization the growing polymer chains prefer to add the other monomer, i.e. the crossover reaction dominates. The same is true for the myrcene/p-fluorostyrene copolymerization, although the myrcene radical has a higher preference for myrcene monomer in this copolymerization than it does in the myrcene-MMA copolymerization. |
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