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Thermally induced polymerization in m ‐ and p ‐halogenomethyl‐benzoates to poly(hydroxymethylbenzoic acid)
Author(s) -
Herzberg Oliver,
Epple Matthias
Publication year - 1999
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/(sici)1521-3935(19991201)200:12<2662::aid-macp2662>3.0.co;2-h
Subject(s) - chemistry , alkali metal , salt (chemistry) , polymerization , benzoates , polymer chemistry , halide , polymer , polyester , inorganic chemistry , organic chemistry
Heating alkali salts of m ‐ and p ‐halogenomethylbenzoic acid above ca. 100°C leads to elimination of alkali halide and formation of the corresponding poly(hydroxymethylbenzoic acid). The salt is precipitated as small cubes (ca. 0.3 μm) in a matrix of the polyester and can be washed out with water to leave a porous material (pore size <1 μm). The degree of polymerisation of the polymers is between 30 and 100, depending on the benzoate salt and the reaction conditions. The reaction appears to occur at least partially in the solid state.