Martinez, Alina M. published the artcilePermanent and reversibly programmable shapes in liquid crystal elastomer microparticles capable of shape switching, Computed Properties of 7575-23-7, the main research area is liquid crystal elastomer microparticle thiol Michael dispersion polymerization.
Reversibly programmable liquid crystal elastomer microparticles (LCEMPs), formed as a covalent adaptable network (CAN), with an average diameter of 7μm ± 2μm, were synthesized via a thiol-Michael dispersion polymerization The particles were programmed to a prolate shape via a photoinitiated addition-fragmentation chain-transfer (AFT) exchange reaction by activating the AFT after undergoing compression. Due to the thermotropic nature of the AFT-LCEMPs, shape switching was driven by heating the particles above their nematic-isotropic phase transition temperature (TNI). The programmed particles subsequently displayed cyclable two-way shape switching from prolate to spherical when at low or high temperatures, resp. Furthermore, the shape programming is reversible, and a second programming step was done to erase the prolate shape by initiating AFT at high temperature while the particles were in their spherical shape. Upon cooling, the particles remained spherical until addnl. programming steps were taken. Particles were also programmed to maintain a permanent oblate shape. Addnl., the particle surface was programmed with a diffraction grating, demonstrating programmable complex surface topog. via AFT activation.
Soft Matter published new progress about Birefringence. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Computed Properties of 7575-23-7.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts