University of Oulu

Geng et al. Plasticizing and crosslinking effects of borate additives on the structure and properties of poly(vinyl acetate). RSC Adv., 2017,7, 7483-7491. DOI: 10.1039/c6ra28574k

Plasticizing and crosslinking effects of borate additives on the structure and properties of poly(vinyl acetate)

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Author: Geng, Shiyu1; Ullah Shah, Faiz2; Liu, Peng1;
Organizations: 1Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, Sweden
2Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden
3Department of Physics, University of Warwick, Coventry, UK
4Fibre and Particle Engineering, University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe201704055957
Language: English
Published: RSC Publishing, 2017
Publish Date: 2017-04-05
Description:

Abstract

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.

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Series: Rsc advances
ISSN: 2046-2069
ISSN-E: 2046-2069
ISSN-L: 2046-2069
Volume: 7
Issue: 13
Pages: 7483 - 7491
DOI: 10.1039/C6RA28574K
OADOI: https://oadoi.org/10.1039/C6RA28574K
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
116 Chemical sciences
Subjects:
Funding: Financial support from the Wallenberg Wood Science Center and Kempe Foundation are greatly appreciated. A “Bruker” NMR spectrometer and Atomic Force Microscopy has been purchased from funds raised by the Kempe Foundation and Luleå University of Technology.
Copyright information: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. This journal is © The Royal Society of Chemistry 2017
  https://creativecommons.org/licenses/by/3.0/