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The role of radical polymerization in the production of thermoregulating microcapsules or polymers from saturated and unsaturated fatty acids
Author(s) -
Szczotok Anna M.,
Carmona Manuel,
Kjøniksen AnnaLena,
Rodriguez Juan F.
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45970
Subject(s) - monomer , polymerization , styrene , chemistry , suspension polymerization , divinylbenzene , radical polymerization , polymer , polymer chemistry , unsaturated fatty acid , linoleic acid , double bond , oleic acid , fourier transform infrared spectroscopy , fatty acid , organic chemistry , chemical engineering , copolymer , engineering , biochemistry
The microencapsulation of linoleic (LinA), oleic, erucic, and palmitic acids (PAs) from styrene and divinylbenzene were studied by using the suspension‐like polymerization technique. All materials exhibited a spherical shape, with a particle size between 166 and 416 μm. The phase change material (PCM) content decreased with the presence of double bonds in the fatty acid molecule. The thermal energy storage (TES) capacity of the microcapsules (MC) containing saturated PA was the highest (123.30 J g −1 ). Whereas, the lowest TES capacity was observed for the LinA. TES capacity values from unsaturated fatty acid materials and the high particle yield indicated that these kinds of acids played two different roles, as PCM and also as monomers, in the radical polymerization processes. At high initiator concentrations, the unsaturated fatty acids were observed to react. This was confirmed by Fourier transform infrared where the peak assigned to the CC bond disappears in the spectrum of MC. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45970.