The graft copolymerization of styrene and lignin. III. Chain transfer reactions of lignin and lignin model compounds | Zendy

Phillips R. B. | Zendy; Brown W. | Zendy; Stannett V. | Zendy

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The graft copolymerization of styrene and lignin. III. Chain transfer reactions of lignin and lignin model compounds

Author(s) -

Phillips R. B.,

Brown W.,

Stannett V.

Publication year - 1973

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1973.070170210

Subject(s) - lignin , guaiacol , polymerization , copolymer , chain transfer , polymer chemistry , styrene , chemistry , softwood , polymer , isoeugenol , allylic rearrangement , organic chemistry , radical polymerization , materials science , catalysis , composite material , eugenol

The effect of addition of lignin model compounds on the polymerization rate and molecular weight of polymer in the radiation‐induced polymerization of styrene was studied. Guaiacol, a model for softwood lignin, reacted slowly with styrene radicals, while 2,6‐dimethoxyphenol, a hardwood lignin model, was a much more efficient chain transfer agent. Studies with isoeugenol indicate that allylic or phenoxy radical stability in a conjugated system may terminate polymerization quite effectively. The results are discussed in the light of new and previous data with isolated lignins; they are consistent with the previously presented grafting scheme.

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