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:
Polyamide microcapsules containing solutions of azo-bis-isobutyronitrile (AIBN) were prepared and characterized as regards diameter and wall thickness. Under UV irradiation the AIBN eliminates nitrogen, and this, under suitable conditions, leads to rupture of the capsules. The influence of capsular diameter and wall thickness of the crosslinking agent silane, of AIBN concentration, and of light intensity on the photoelimination and rupture were studied by determining rates of nitrogen release and by microscopic examination. The results are interpreted in terms of release of nitrogen in the core followed by diffusion of nitrogen or of core solution through the walls, or rupture of the microcapsules. The application to controlled photochemical release of contents is considered.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1981.070260307
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