Shi Jie-feng
2007
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Journal
Polymer Materials Science and Engineering
Abstract
4,4′-Azobis-4-cyanopentanoyl chloride was prepared by reaction of 4,4′-azobis-4-cyanopentanoic acid and phosphorus pentachloride.Then the polyethylene glycol macroazoinitiator was synthesized by using PEG-1000 and 4,4′-azobis-4-cyanopentanoyl chloride through condensation reaction.The structure of this macroazoinitiator was characterized by Fourier transform infrared spectroscopy(FT-IR),proton nuclear magnetic resonance(1H-NMR),ultraviolet spectrum(UV) and gel permeation chromatography(GPC).The kinetic thermal decomposition of this macroazoinitiator was studied by differential scanning calorimetry(DSC).The results indicate that the decomposition activation energy of this macroazoinitiator is 120.2 kJ/mol,and its frequency factor is 1.165×1014 s-1.