ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Poly(glycidyl azide) (PGA) was synthesized by reaction of polyepichlorohydrin (PECH) with sodium azide (NaN3) by using phase-transfer catalysis. A detailed analysis was performed to follow the polymer-polymer conversion reaction. Conversion of —CH2—CL to — CH2 — N3 was achieved completely in 6 h, as determined from FTIR assignment, UV-VIS spectroscopy, and thermal analysis. In FTIR and UV-VIS spectroscopy studies, the reaction was followed from the change in characteristic peak intensities. Thermal analysis also showed that the first thermal decomposition process of PGA, which is due to the exothermic clevage of pendant—N3 groups, was shifted to higher temperatures, and the exothermicity was increased as the conversion proceeded. It was also found that the extent and completion of—CL to—N3 conversion could be easily followed by measuring the glass transition temperature and exothermic decompostion of the polymers. The quantitative analysis of the data collected from FTIR and DSC measurements showed that PECH → PGA conversion is a first-order reaction with a rate constant of k = 0.74 h-1. © 1996 John Wiley & Sons, Inc.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
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