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Plasticizing and crosslinking effects of borate additives on the structure and properties of poly(vinyl acetate)
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-3652-7798
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-1067-7990
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Number of Authors: 5
2017 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 7, no 13, 7483-7491 p.Article in journal (Refereed) Published
Abstract [en]

As an environmentally friendly, low-cost and widely used polymer, poly(vinyl acetate) (PVAc) is worth modifying to achieve better properties. Here, we report on the influence of borate additives on the structure and properties of partially hydrolysed PVAc. In addition to the general crosslinking function of borate additives, an extraordinary plasticizing effect was found. By controlling the pH from 4 to 11 during sample preparation, the plasticizing and crosslinking effects can be shifted. In alkaline conditions, the degree of crosslinking in the PVAc/borate sample is increased; however, this increase declines gradually with an increase in the borate additive content, which impacts the morphology of the PVAc latex particles, as well as the mechanical and thermal properties of the PVAc/borate films. In contrast, in acidic conditions, the PVAc/borate films are plasticized by borate additives; thus, their ultimate mechanical strength, elastic moduli and thermal stabilities decrease, while the water diffusivities increase.

Place, publisher, year, edition, pages
2017. Vol. 7, no 13, 7483-7491 p.
National Category
Physical Chemistry Bio Materials
Research subject
Wood and Bionanocomposites; Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-61616DOI: 10.1039/C6RA28574KISI: 000393757100006Scopus ID: 2-s2.0-85010648470OAI: oai:DiVA.org:ltu-61616DiVA: diva2:1068198
Note

Validerad; 2017; Nivå 2; 2017-02-13 (andbra)

Available from: 2017-01-24 Created: 2017-01-24 Last updated: 2017-07-07Bibliographically approved

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