Premium
Microencapsulation of Alkaline Salt Hydrate Melts for Phase Change Applications by Surface Thiol‐Michael Addition Polymerization
Author(s) -
Platte Daniela,
Helbig Uta,
Houbertz Ruth,
Sextl Gerhard
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201100338
Subject(s) - acrylate , polymerization , monomer , materials science , polymer chemistry , thiol , hydrate , chemical engineering , michael reaction , polymer , organic chemistry , chemistry , composite material , catalysis , engineering
The microencapsulation of alkaline salt hydrates suitable as inorganic phase change materials (PCMs) via surface Michael‐type addition polymerization of thiols and acrylates is reported. The encapsulation performance depending on the resins' acrylate‐to‐thiol ratio and monomer functionality is investigated, and the best encapsulation performance is found for resin compositions with considerable acrylate excess ratios. The step‐growth nature of the reaction can be substantiated via comparative bulk polymerizations. A multistage encapsulation mechanism is proposed in order to explain the different dependencies on the acrylate to thiol ratio observed in PCM encapsulations in comparison to bulk polymerizations.