Biodegradation of polymeric builders—experiments with a C-14 labelled sodium poly(α-hydroxyacrylate)

Mulders, Jan M.C.A.; Gilain, J.

doi:10.1016/0043-1354(77)90167-1

Cited by 10 publications

(1 citation statement)

References 4 publications

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“…Polyelectrolytes are often known to have a poor biodegradability but the PHA molecule is biodegradable to a large extent which makes it attractive also elsewhere within chemical industry such as detergent applications as metal and fatty acid removing agent [2,3].…”

Section: Introductionmentioning

confidence: 99%

Intramolecular Lactonization of Poly(α-hydroxyacrylic acid): Kinetics and Reaction Mechanism

Virkki

Vuori

Vuorinen

2015

Journal of Polymers

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Poly( -hydroxyacrylic acid), PHA, is one of the few polymers with biodegradable properties used in mechanical pulp bleaching to stabilize hydrogen peroxide. A new method for the in situ follow-up of the lactone ring formation of PHA has been developed. The results have further been applied to describe the reaction kinetics of the lactonization and hydrolysis reactions through parameter estimation. In addition, the reaction mechanism is elucidated by multivariate data analysis. Satisfactory identification and semiquantitative separation of the lactone ring as well as the acyclic (carboxyl and hydroxyl groups) forms have been established by 1 H NMR in the pH range of 1-9. The lactonization reaction approaching equilibrium can be described by pseudo-first-order kinetics in the pH range of 1-6. The rate constants of the pseudo-first-order kinetic model have been estimated by nonlinear regression. Due to the very low rates of lactonization as well as the weak pH dependency of the reaction, an addition-elimination mechanism is proposed. Additionally, the presence of a transient reaction intermediate during lactonization reaction could be identified by subjecting the measurement data to multivariate data analysis (PCA, principal component analysis). A good correlation was found between the kinetic and the PCA models in terms of model validity.

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Section: Introductionmentioning

confidence: 99%

Intramolecular Lactonization of Poly(α-hydroxyacrylic acid): Kinetics and Reaction Mechanism

Virkki

Vuori

Vuorinen

2015

Journal of Polymers

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Polymers, Environmentally Degradable

Swift

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Environmentally degradable polymers are a new technology being developed in response to polymer waste‐management, effects of which are threatening to consume valuable landfill sites and are detracting from the aesthetics of land‐ and seascapes. These polymers are one of a range of technologies that are addressing the problem; others include recycle, incineration, and continued landfill. Environmentally degradable polymers include water‐soluble polymers and plastics and degrade by oxidation, hydrolysis, irradiation (photodegradation), and biological pathways. The principal opportunities for this technology are in the niche markets for plastic used in food packaging, agriculture, hygienic products, and other applications with difficult‐to‐recover options; and for water‐soluble polymers in general, which are not sufficiently readily recoverable for one of the alternative disposal technologies to be of value.

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Biodegradation of Synthetic Water‐Soluble Polymers

Swift¹

2002

Biopolymers Online

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Introduction Historical Outline Definitions Disposal Options for Biodegradable Water‐Soluble Polymers Test Methods for Biodegradable Water‐Soluble Polymers Biodegradable Water‐Soluble Polymers Carbon‐Chain Polymers Poly(Vinyl Alcohol) Polycarboxylates Heteroatom Chain Polymers Polyesters and Polyamides Polyethers Modified Natural Polymers Graft Polymers Chemical Modification of Polysaccharides Summary

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Biodegradation of polymeric builders—experiments with a C-14 labelled sodium poly(α-hydroxyacrylate)

Cited by 10 publications

References 4 publications

Intramolecular Lactonization of Poly(α-hydroxyacrylic acid): Kinetics and Reaction Mechanism

Intramolecular Lactonization of Poly(α-hydroxyacrylic acid): Kinetics and Reaction Mechanism

Polymers, Environmentally Degradable

Biodegradation of Synthetic Water‐Soluble Polymers

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