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A One‐Pot Approach to Novel Cross‐Linked Polyphosphazene Microspheres with Active Amino Groups
Author(s) -
Zhang Peng,
Huang Xiaobin,
Fu Jianwei,
Huang Yawen,
Zhu Yan,
Tang Xiaozhen
Publication year - 2009
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/macp.200800597
Subject(s) - differential scanning calorimetry , polymer chemistry , polyphosphazene , chemistry , fourier transform infrared spectroscopy , scanning electron microscope , polymerization , monomer , cationic polymerization , copolymer , ether , surface modification , nuclear chemistry , chemical engineering , polymer , organic chemistry , materials science , engineering , composite material , thermodynamics , physics
Highly cross‐linked microspheres bearing active amino groups on the surface have been successfully synthesized via a single‐step precipitation polymerization of hexachlorocyclotriphosphazene (HCCP) with 4,4′‐diaminodiphenyl ether (ODA) in acetonitrile medium without any added surfactant. The active microspheres were characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and differential scanning calorimetry (DSC). The results revealed that the active microspheres had clean surfaces and they were in the size of micrometer range, varying from 0.5 to 2.5 µm. The accessibility of the surface amino groups to further functionalization was confirmed by the reaction of these groups with benzoxy chloride. Interestingly, the content of amino groups can be easily tailored through changing the molar ratio of HCCP to ODA. The effects of the concentration of HCCP and the monomer ratios on the morphology were also discussed.