Poly(N-acryloyl-N’-propylpiperazine): A New Stimuli-Responsive Polymer was written by Gan, L. H.;Gan, Y. Y.;Deen, G. Roshan. And the article was included in Macromolecules in 2000.Recommanded Product: 1-Propylpiperazine This article mentions the following:
A new water-soluble stimuli-responsive poly(N-acryloyl-N’-propylpiperazine) (PAcrNPP) was synthesized and characterized. The polymer exhibited a lower critical solution temperature (LCST) in water at 37°. The phase transition temperature was highly sensitive to pH changes. The effects of some simple salts and cationic surfactants were studied. The enthalpy of phase separation determined by microcalorimetry was 21.4 kJ mol-1. This value corresponds to the breaking of one hydrogen bond per monomer unit. Dynamic light scattering studies indicated some aggregations of polymer chains below the LCST. No such aggregations were observed for the lower analogs, poly(N-acryloyl-N’-methylpiperazine) (PAcrNMP) and poly(N-acryloyl-N’-ethylpiperazine) (PAcrNEP) which exhibited no LCST. The crosslinked polymer gels were sensitive to both pH and temperature Their response time to swelling and deswelling was 150 min. The water sorption of the gels was non-Fickian under both acidic and neutral conditions. In the experiment, the researchers used many compounds, for example, 1-Propylpiperazine (cas: 21867-64-1Recommanded Product: 1-Propylpiperazine).
1-Propylpiperazine (cas: 21867-64-1) belongs to piperazine derivatives. Piperazine is a fairly basic compound and is an amine solvent. Although many piperazine derivatives occur naturally, piperazine itself can be synthesized by reacting alcoholic ammonia with 1,2-dichloroethane, by the action of sodium and ethylene glycol on ethylene diamine hydrochloride, or by reduction of pyrazine with sodium in ethanol.Recommanded Product: 1-Propylpiperazine
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics