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Modification of oxidized lignins with styrene
Author(s) -
Katuščák S.,
Mahdalík M.,
Hrivík A.,
Minárik 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.1973.070170624
Subject(s) - polymerization , copolymer , styrene , lignin , polymer chemistry , hydrolysis , chemistry , solvent , materials science , organic chemistry , polymer
The effect of original and ozonized lignins upon the polymerization of styrene was investigated. It was found that the unoxidized lignin prepared by hydrolysis of spruce wood meals with 42% HCl retards the thermal polymerization of styrene. The ozonization of HCl‐lignin leads to its chemical transformation during which two types of functional groups are formed: those inhibiting and those initiating the polymerization of styrene. Moreover, the polymerization of styrene in the presence of oxidized HCl‐lignin affords both homopolymer and grafted copolymer. The amount of the grafted copolymer depends upon the concentration of active oxygen in lignin formed during oxidation, upon the temperature of polymerization, and, finally, upon the kind and concentration of the solvent used in the polymerization system.