ABA Type Amphiphiles with Poly(2-benzhydryl-2-oxazine) Moieties: Synthesis, Characterization and Inverse Thermogelation was written by Hahn, Lukas;Kessler, Larissa;Polzin, Lando;Fritze, Lars;Forster, Stefan;Helten, Holger;Luxenhofer, Robert. And the article was included in Macromolecular Chemistry and Physics in 2021.Related Products of 1126-09-6 This article mentions the following:
Thermoresponsive polymers are frequently involved in the development of materials for various applications. Here, polymers containing poly(2- benzhydryl-2-oxazine) (pBhOzi) repeating units are described for the first time. The homopolymer pBhOzi and an ABA type amphiphile comprising two flanking hydrophilic A blocks of poly(2-methyl-2-oxazoline) (pMeOx) and the hydrophobic aromatic pBhOzi central B block (pMeOx-b-pBhOzi-b-pMeOx) are synthesized and the latter is shown to exhibit inverse thermogelling properties at concentrations of 20 weight% in water. This behavior stands in contrast to a homolog ABA amphiphile consisting of a central poly(2-benzhydryl-2-oxazoline) block (pMeOx-b-pBhOx-b-pMeOx). No inverse thermogelling is observed with this polymer even at 25 weight%. For 25 weight% pMeOx-b-pBhOzi-b-pMeOx, a surprisingly high storage modulus of 鈮?2 kPa and high values for the yield and flow points of 480 Pa and 1.3 kPa are obtained. Exceeding the yield point, pronounced shear thinning is observed Interestingly, only little difference between self-assemblies of pMeOx-b-pBhOzi-b-pMeOx and pMeOx-b-pBhOx-b-pMeOx is observed by dynamic light scattering while transmission electron microscopy images suggest that the micelles of pMeOx-b-pBhOzi-b-pMeOx interact through their hydrophilic coronas, which is probably decisive for the gel formation. Overall, this study introduces new building blocks for poly(2-oxazoline) and poly(2-oxazine)-based self-assemblies, but addnl. studies will be needed to unravel the exact mechanism. In the experiment, the researchers used many compounds, for example, Ethyl piperidine-4-carboxylate (cas: 1126-09-6Related Products of 1126-09-6).
Ethyl piperidine-4-carboxylate (cas: 1126-09-6) belongs to piperidine derivatives. The piperidine moiety constitutes an important building block for the synthesis of a variety of bioactive natural products, alkaloids and other drugs. Piperidine derivatives are being utilized in different ways as anticancer, antiviral, antimalarial, antimicrobial, antifungal, antihypertension, analgesic, anti-inflammatory, anti-Alzheimer, antipsychotic and/or anticoagulant agents.Related Products of 1126-09-6
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem