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Synthesis of hyperbranched aromatic polyesters by carbon monoxide insertion reaction using palladium catalyst
Author(s) -
Ishida Yuichi,
Jikei Mitsutoshi,
Kakimoto Masaaki
Publication year - 2000
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/1099-1581(200008/12)11:8/12<698::aid-pat22>3.0.co;2-w
Subject(s) - monomer , polymerization , solubility , carbon monoxide , polyester , polymer chemistry , polymer , materials science , catalysis , palladium , organic chemistry , chemistry
Hyperbranched aromatic polyesters were synthesized by the polymerization of AB 2 (3,5‐dibromophenol) and A 2 B (5‐bromoresorcinol and 5‐iodoresorcinol) monomers through the palladium‐catalyzed carbon monoxide insertion reaction. The polymerization of 3,5‐dibromophenol resulted in a polymer with poor solubility, however, after the use of end‐capping agents, polymers with good solubility in aprotic polar solvents were obtained. Hyperbranched aromatic polyesters prepared by the polymerization of 5‐bromo‐ or 5‐iodo‐resorcinol gave low‐molecular‐weight polymers, but have good solubility without end‐capping agents. The polymer from the AB 2 ‐type monomer was compared with the polymer from the A 2 B‐type monomer. Copyright © 2000 John Wiley & Sons, Ltd.