Advanced Powder Technology, Vol.30, No.11, 2580-2587, 2019
Polymeric micropowders from thermal reversible crosslinking of oligomers
Polymeric microparticles provide great potentials for applications originated from their high surface area and functionalities and thus have attained many attentions in various fields. Here, we attempt to fabricate polymeric micropowders based on the reversible thermal crosslinking (Diels-Alder reaction). Initially, poly(FEEMA) obtained from the radical polymerization of furan functionalized monomer and partially crosslinked poly(FEEMA) respectively. The physical properties of base-polymer for fabrication of microparticles have changed in order to control thermal responsible property of final micro particles. Based on Diels-Alder reaction, microparticles in the size range of 200 nm-2 mu m were successfully prepared using polymer precursors and cross-linker in oil-in-water emulsion. Controlling the molecular weight as well as crosslinked density of polymer precursors makes it possible to adjust the thermal properties (glass transition temperature and retro-Diels-Alder temperature) of the microparticles. These series of method can provide thermal triggered, selective meltdown microparticles for several application fields such as selective gluing, patching, filling or healing by applying external heat. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
Keywords:Stimulus responsive power;Polymer microparticles;Diels-Alder reaction;Thermal reversible crosslinking;Emulsion polymerization