Syntheses and thermodynamic studies on the protonation behaviour of polymers containing acylpiperazinyl units in the backbone or in the side chain of a vinyl polymer
Identifieur interne : 001477 ( Main/Exploration ); précédent : 001476; suivant : 001478Syntheses and thermodynamic studies on the protonation behaviour of polymers containing acylpiperazinyl units in the backbone or in the side chain of a vinyl polymer
Auteurs : Rolando Barbucci [Italie] ; Mario Casolaro [Italie] ; Paolo Ferruti [Italie] ; M. Cristina Tanzi [Italie] ; Lucia Grassi [Italie] ; Chiara Barozzi [Italie]Source :
- Die Makromolekulare Chemie [ 0025-116X ] ; 1984-08.
English descriptors
- Teeft :
- Acryloyl chloride, Amido groups, Amino groups, Aqueous solution, Barbucci, Barone, Basicity, Basicity constants, Behaviour, Calorimetric, Calorimetric measurements, Calorimetric techniques, Casolaro, Constant weight, Corresponding monomer, Experimental details, Ferruti, Full agreement, Greater hydration, Hydrochloric acid, Hydrogen bonds, Initial amount, Ionic strength, Macromolecular chain, Macromolecule, Methyl groups, Nacl, Nacl solution, Negative values, Neighbouring unit, Other hand, Polymer, Polyvinylic structure, Potentiometric, Potentiometric measurements, Protonation, Protonation behaviour, Radical polymerization, Reaction mixture, Reaction vessel, Tanzi, Thermodynamic, Thermodynamic studies, Thermodynamic values, Titrant conc, Titration, Titration curve.
Abstract
Linear poly(1,4‐piperazinediyl‐1‐oxotrimethylene) (1), in which amido and tertiary amino groups regularly alternate along the macromolecular chain, the isomeric poly[1‐(1‐piperazinyl‐carbonyl)ethylene] (8) for polyvinylic structure and its N‐methylated derivative, poly{1‐[(4‐methyl‐1‐piperazinyl)carbonyl]ethylene} (3), were prepared and characterized. Their protonation behaviour was investigated in aqueous solution by potentiometric and calorimetric techniques. In all cases the basicity constants were found to decrease linearly with α (the degree of protonation), whereas the enthalpy changes show a different behaviour toward protonation. The thermodynamic values indicate the important role of hydrophobic interactions.
Url:
DOI: 10.1002/macp.1984.021850804
Affiliations:
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Da Vinci 32, 20133 Milano</wicri:regionArea><wicri:noRegion>20133 Milano</wicri:noRegion></affiliation></author><author><name sortKey="Barozzi, Chiara" sort="Barozzi, Chiara" uniqKey="Barozzi C" first="Chiara" last="Barozzi">Chiara Barozzi</name><affiliation wicri:level="1"><country xml:lang="fr">Italie</country><wicri:regionArea>Dipartimento di Chimica Industriale e Ingegneria Chimica del Politecnico, P. za L. Da Vinci 32, 20133 Milano</wicri:regionArea><wicri:noRegion>20133 Milano</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Die Makromolekulare Chemie</title><title level="j" type="abbrev">Makromol. Chem.</title><idno type="ISSN">0025-116X</idno><idno type="eISSN">0025-116X</idno><imprint><publisher>Hüthig & Wepf Verlag</publisher><pubPlace>Basel</pubPlace><date type="published" when="1984-08">1984-08</date><biblScope unit="volume">185</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="1525">1525</biblScope><biblScope unit="page" to="1535">1535</biblScope></imprint><idno type="ISSN">0025-116X</idno></series><idno type="istex">4EC6EA613055D5C2E459CDB3C0876918A3EE9301</idno><idno type="DOI">10.1002/macp.1984.021850804</idno><idno type="ArticleID">MACP021850804</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0025-116X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Acryloyl chloride</term><term>Amido groups</term><term>Amino groups</term><term>Aqueous solution</term><term>Barbucci</term><term>Barone</term><term>Basicity</term><term>Basicity constants</term><term>Behaviour</term><term>Calorimetric</term><term>Calorimetric measurements</term><term>Calorimetric techniques</term><term>Casolaro</term><term>Constant weight</term><term>Corresponding monomer</term><term>Experimental details</term><term>Ferruti</term><term>Full agreement</term><term>Greater hydration</term><term>Hydrochloric acid</term><term>Hydrogen bonds</term><term>Initial amount</term><term>Ionic strength</term><term>Macromolecular chain</term><term>Macromolecule</term><term>Methyl groups</term><term>Nacl</term><term>Nacl solution</term><term>Negative values</term><term>Neighbouring unit</term><term>Other hand</term><term>Polymer</term><term>Polyvinylic structure</term><term>Potentiometric</term><term>Potentiometric measurements</term><term>Protonation</term><term>Protonation behaviour</term><term>Radical polymerization</term><term>Reaction mixture</term><term>Reaction vessel</term><term>Tanzi</term><term>Thermodynamic</term><term>Thermodynamic studies</term><term>Thermodynamic values</term><term>Titrant conc</term><term>Titration</term><term>Titration curve</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Linear poly(1,4‐piperazinediyl‐1‐oxotrimethylene) (1), in which amido and tertiary amino groups regularly alternate along the macromolecular chain, the isomeric poly[1‐(1‐piperazinyl‐carbonyl)ethylene] (8) for polyvinylic structure and its N‐methylated derivative, poly{1‐[(4‐methyl‐1‐piperazinyl)carbonyl]ethylene} (3), were prepared and characterized. Their protonation behaviour was investigated in aqueous solution by potentiometric and calorimetric techniques. In all cases the basicity constants were found to decrease linearly with α (the degree of protonation), whereas the enthalpy changes show a different behaviour toward protonation. The thermodynamic values indicate the important role of hydrophobic interactions.</div></front></TEI><affiliations><list><country><li>Italie</li></country></list><tree><country name="Italie"><noRegion><name sortKey="Barbucci, Rolando" sort="Barbucci, Rolando" uniqKey="Barbucci R" first="Rolando" last="Barbucci">Rolando Barbucci</name></noRegion><name sortKey="Barbucci, Rolando" sort="Barbucci, Rolando" uniqKey="Barbucci R" first="Rolando" last="Barbucci">Rolando Barbucci</name><name sortKey="Barozzi, Chiara" sort="Barozzi, Chiara" uniqKey="Barozzi C" first="Chiara" last="Barozzi">Chiara Barozzi</name><name sortKey="Casolaro, Mario" sort="Casolaro, Mario" uniqKey="Casolaro M" first="Mario" last="Casolaro">Mario Casolaro</name><name sortKey="Ferruti, Paolo" sort="Ferruti, Paolo" uniqKey="Ferruti P" first="Paolo" last="Ferruti">Paolo Ferruti</name><name sortKey="Grassi, Lucia" sort="Grassi, Lucia" uniqKey="Grassi L" first="Lucia" last="Grassi">Lucia Grassi</name><name sortKey="Tanzi, M Cristina" sort="Tanzi, M Cristina" uniqKey="Tanzi M" first="M. Cristina" last="Tanzi">M. Cristina Tanzi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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