Copolymer-polyelectrolyte-homopolymer associations: effects of neighbouring comonomer units and copolymer structure on interpolymer complexation

✍ Scribed by Chatterjee, Saroj K.; Misra, Neeti

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 317 KB
• Volume: 47
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199811)47:3<367::aid-pi81>3.0.co;2-d

✦ Synopsis

Interpolymer interactions between acrylamideÈvinyl alcohol graft copolymer with poly(ethyleneimine) (PEI) and non-ionic homopolymers, e.g. poly(vinyl pyrrolidone) (PVP) and poly(ethylene oxide) (PEO), have been studied. Some blends of binary homopolymer complexes having the same proportion of interacting units as in copolymer complex have been prepared. Simple binary complexes of PEI have also been prepared with individual non-ionic homopolymers, e.g. poly(acrylamide) (PAAm), poly(vinyl pyrrolidone) (PVP), poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA). The stability constant (K), degree of linkage (h) and related thermodynamic parameters, e.g. standard free energy change standard enthalpy change and standard (*GÖ), (*HÖ) entropy change have been compared for the above three types of complex-(*SÖ) ation systems using OsadaÏs method. The comparative study indicated considerable di †erences in the values of the parameters, which have been interpreted on the basis of copolymer structure, presence of neighbouring comonomer units and other non-ionic homopolymers.