Banerjee, Palash; Jana, Somdeb; Mandal, Tarun K. published the artcile< Coulomb interaction-driven UCST in poly(ionic liquid) random copolymers>, Recommanded Product: 1-(Chloromethyl)-4-vinylbenzene, the main research area is Coulomb driven UCST polyionic liquid random copolymer.
Upper critical solution temperature (UCST)-type thermoresponsive phenomena is not very common in conventional hydrophobic or hydrophilic polymers in aqueous solution The incorporation of poly(triphenyl-4-vinylbenzylphosphonium chloride) (P[VBTP][Cl]), poly(ionic liquid) (PIL) segment with either hydrophobic poly(Me methacrylate)(PMMA)/polystyrene (PS) or hydrophilic poly(hydroxyethyl methacrylate)(PHEMA)/poly(N-iso-Pr acrylamide)(PNIPAM) segments via reversible addition-fragmentation chain transfer (RAFT) copolymerization is a simple, yet versatile approach for introducing UCST property in their random copolymers. These PIL copolymers exhibit UCST-type behaviors in aqueous or in methanol solution depending on their compositions in the presence of externally added halide anion (Cl- and I-). The cause of UCST is the formation of copolymer aggregates by anion-bridging Coulomb interactions followed by their disruption upon heating. The cloud points of these copolymers can easily be tuned with respect to the copolymer compositions as well as concentrations of anions. Whereas, the random copolymer of P[VBTP][Cl] and PNIPAM segments with low (ca. 1.1-19.3 wt%) ionic PIL content show lower critical solution temperature (LCST)-type behavior and its cloud point increases linearly with increasing ionic PIL content. More interestingly, P[VBTP][Cl]-ran-PNIPAM copolymer containing high (ca. 34.5 wt%) percentage of ionic PIL segment simultaneously show a LCST-type transition at lower temperature followed by an UCST-type transition at higher temperature in the presence of chloride ions. Tuning of both the LCST-/UCST-type cloud points is possible by varying the concentrations of copolymer and the added chloride ion.
European Polymer Journal published new progress about Cloud point. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, Recommanded Product: 1-(Chloromethyl)-4-vinylbenzene.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics