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Synthesis of Hydrophilic Aromatic Polyesteramide Porous Bodies Having Controlled Structures and Characteristics from Submicron‐Sized Particles
Author(s) -
Yoshioka Yayoi
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001238
Subject(s) - crystallinity , monomer , crystallization , pyridine , copolymer , polymer chemistry , chemical engineering , polymerization , precipitation , porosity , chemistry , acetone , particle size , particle (ecology) , water of crystallization , degree of polymerization , precipitation polymerization , materials science , polymer , organic chemistry , crystallography , radical polymerization , physics , oceanography , meteorology , engineering , geology
Crosslinked aromatic polyesteramide porous bodies with hydroxyl and amino groups are prepared by reacting m ‐phthalyl chloride and 4,4′‐diamino‐3,3′‐dihydroxybiphenyl in acetone solutions containing pyridine and water via a one‐step precipitation polymerization method. These materials show meso and macroporous structures in which spherical particles with average diameters of 60–160 nm are aggregated and bonded. The pore diameter, particle diameter, copolymerization ratio, concentrations of functional groups, and degree of crystallinity depend on the proportions of water and pyridine in the reaction mixture. Pyridine accelerates both the esterification and amidation reactions while water promotes only the amidation. The degree of crystallinity is significantly affected not only by the monomer ratio in the copolymer but also by the environment during crystallization. The addition of water has a pronounced effect on the crystallization mechanism, although the porous bodies have crosslinked structures.