Effects of inclusion complexation and degree of protonation on cloud point of poly(N-acryloyl-N’-propylpiperazine) was written by Guo, Kai;Sun, Liang;Wu, Meng-chun;Wang, Shao-dan;Wang, Li-yan. And the article was included in Gaodeng Xuexiao Huaxue Xuebao in 2011.Application In Synthesis of 1-Propylpiperazine This article mentions the following:
Poly(N-acryloyl-N’-propylpiperazine) (PAcrNPP) is a pH- and temperature-responsive homopolymer. Degree of protonation of PAcrNPP can be changed by adjusting pH of the solution Cloud point of PAcrNPP increased with increasing degree of protonation. We investigated the effects of different sizes of cyclodextrins( CD) on cloud point of PAcrNPP. It was found that α-CD showed a significant effect on cloud point of PAcrNPP while γ-CD had almost no effect on its cloud point. At pH = 9.0 and pH = 7.4, we measured cloud points of PAcrNPP solutions containing different concentrations of α-CD. Cloud point of PAcrNPP solutions rises with increase of concentration of α-CD. Further more, we deduced an equation on the basis of contributions of different forms of PAcrNPP to cloud point. This equation describes the combined effect of complexation of CD and degree of protonation on cloud point from the viewpoint of chem. equilibrium In the experiment, the researchers used many compounds, for example, 1-Propylpiperazine (cas: 21867-64-1Application In Synthesis of 1-Propylpiperazine).
1-Propylpiperazine (cas: 21867-64-1) belongs to piperazine derivatives. Industrial applications of piperazine include the manufacture of plastics, resins, pesticides and brake fluids. 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.Application In Synthesis of 1-Propylpiperazine
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics