期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 214, 期 18, 页码 2115-2123出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201300332
关键词
block copolymers; microphase seperation; hydrogen bonding; in situ small-angle X-ray scattering (SAXS); mesoporous materials
资金
- National Science Council, Taiwan, Republic of China [NSC 100-2221-E-110-029-MY3, NSC 100-2628-E-110-001]
In this study,in situ small-angle X-ray scattering (SAXS), in situ Fourier transform infrared (FTIR) spectroscopy, and transmission electron microscopy (TEM) are used to monitor the formation of ordered mesophases in cured mixtures of phenolic resin and the diblock copolymer poly(ethylene oxide-block-epsilon-caprolactone) (PEO-b-PCL). SAXS and TEM analyses reveal that the mesophase of the phenolic/PEO-b-PCL mixture transforms sequentially from disordered to short-range-ordered to hexagonal-cylindrical to gyroidal during the curing process when using hexamethylenetetramine (HMTA) as a cross-linking agent, indicating that a mechanism involving reaction-induced microphase separation controls the self-assembly of the phenolic resin. In situ SAXS is also used to observe the fabrication of mesoporous phenolic resins during subsequent calcination processes.
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