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Miscibility of Blends of Biodegradable Polymers and Copolymers with Different Plasticizers

✍ Scribed by Rosa García-Lopera; Isidro S. Monzó; Iolanda Porcar; Concepción Abad; Agustín Campos

Book ID
102939316
Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
623 KB
Volume
209
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Miscibility between components of different plasticizer(A)/solvent(B)/biodegradable polymer(C) ternary systems with H‐bonding has been compared. Systems were formed by two H‐donor phenolic plasticizers, 4‐nonylphenol (NP) and 4:4′‐dihydroxydiphenylmethane (BPF); an H‐acceptor solvent, epichlorohydrin (ECH); and H‐acceptor poly(3‐hydroxybutyrate) (PHB) or poly[(3‐hydroxybutyrate)‐co‐(3‐hydroxyvalerate)] (PHBHV) copolymers. Blend miscibility is the result of the balance of three competitive H‐bondings: plasticizer self‐association (AA), plasticizer‐solvent (AB) and plasticizer‐polymer (AC) interassociations. The strength and extent of such specific interactions have been experimentally monitored by fluorescence spectroscopy either in solution or in solid state. Theoretical modelling has been conducted with a recent thermodynamic approach based on two free‐energy excess functions.

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