Synthesis, Characterization, and Chemosensing Application of Poly(methyl Methacrylate-Co-Hydroxyethyl Methacrylate) With Dansyl Side Group

Abstract

Abstract:A novel dansyl side-functional polymer (P2) was prepared and employed as the metal cation sensing chemical probe. The synthesis of P2 was performed via consecutive free radical polymerization and esterification reactions. P2 showed characteristic UV-Vis and fluorescence emission bands for the dansyl unit. The fluorescence emission intensity of P2 gradually decreased as the concentrations of the added metal ions were increased.

Switchable Wettability of Poly(NIPAAm-co-HEMA-co-NMA) Coated PET Fabric for Moisture Management

“…The aqueous solution turned from transparent to white turbid as a result of a coil-to-globule conformational transition, in which the increasing temperature causes a hydrophilic to hydrophobic phase change, eventually forming precipitation. The HEMA and NMA moieties in the side chains of the copolymers are highly endowed with a hydroxyl functional group, which is thermally labile [27]. Accordingly, the thermal stability of P1 is significantly lower than that of P2 and P3; and P1 is showing the lowest onset decomposition temperature at 321 • C with a higher molar ratio of HEMA and NMA than that of P2 at 336 • C and P3 at 346 • C. Moreover, the higher weight loss of P1 due to water evaporation from room temperature at 150-180 • C, compared to those of P2 and P3, agrees with the higher water absorption and retention property at high temperatures.…”