Ultraviolet‐induced crosslinking of poly(vinyl alcohol) evaluated by principal component analysis of FTIR spectra

This work was focused on: i) developing single and blend films based on carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVOH) studying their properties, ii) analyzing the interactions between CMC and PVOH and their modifications UV-induced in the presence of sodium benzoate (SB), and iii) evaluating the antimicrobial capacity of blend films containing SB with and without UV treatment. Once the blend films with SB were exposed to UV radiation, they exhibited lower moisture content as well as a greater elongation at break and rougher surfaces compared to those without treatment. Considering oxygen barrier properties, the low values obtained would allow their application as packaging with selective oxygen permeability. Moreover, the characteristics of the amorphous phase of the matrix prevailed with a rearrangement of the structure of the polymer chain, causing a decrease of the crystallinity degree. These results were supported by X-rays and DSC analysis. FT-IR spectra reflected some degree of polymer-polymer interaction at a molecular level in the amorphous regions. The incorporation of sodium benzoate combined with UV treatment in blend films was positive from the microbial point of view because of the growth inhibition of a wide spectrum of microorganisms. From a physicochemical perspective, the UV treatment of films also changed their morphology rendering them more insoluble in water, turning the functionalized blend films into a potential material to be applied as food packaging.

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“…These findings are in accordance with those found by Miranda et al. [52], working on crosslinking of PVOH by UV in the presence of SB.…”

Section: Accepted Manuscriptsupporting

confidence: 94%

“…However, according to Miranda et al [52], it is probable that a free radical arising from the photolysis of sodium…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 98%

Changes induced by UV radiation in the presence of sodium benzoate in films formulated with polyvinyl alcohol and carboxymethyl cellulose

Villarruel

Giannuzzi

Rivero

et al. 2015

Materials Science and Engineering: C

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“…In addition, PEG is more common which could reduce the cost of experiments and simplify the experiments process. PVA and PEG blends have been widely explored as water soluble polymers for numerous industrial, biomedical and pharmaceutical applications due to the advantages of nontoxic, non-carcinogenic and bioadhesive properties [8].The miscibility between the constituents of a polymer mixture is an important factor in the development of new materials based on polymeric blends. In miscible polymeric blends, there are often specific interactions between functional groups or polymer segments that lead to decrease of the Gibbs energy of mixing.…”

mentioning

confidence: 99%

Characterization of Electron Beam Irradiated Poly Vinyl Alcohol/Poly Ethylene Glycol Blends

Ali

Essa²

2013

J. Sci. Res.

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Poly vinyl alcohol (PVA) and poly ethylene glycol (PEG) blends were prepared and irradiated with different electron beam irradiation doses. The influence of the irradiation dose, and PEG content on the physico-chemical properties was investigated. The data regarding gel content demonstrated that the radiation-induced crosslinking of PVA and PVA/PEG samples increased as a result of increasing irradiation dose and decreasing PEG content. The swelling volume ratio shows an opposite behavior. The XRD parameters (crystllinity percent and d-spacing values) show a decreasing behavior for PVA and PVA/PEG blends as a result of either irradiation or blending PVA matrix with PEG. The DSC data illustrate a decreasing trend in melting point, glass transition temperature, and degree of crystallinity with increasing irradiation dose or PEG content. and unhydrolyzation properties, which makes it more environmentally friendly. In addition, PEG is more common which could reduce the cost of experiments and simplify the experiments process. PVA and PEG blends have been widely explored as water soluble polymers for numerous industrial, biomedical and pharmaceutical applications due to the advantages of nontoxic, non-carcinogenic and bioadhesive properties [8].The miscibility between the constituents of a polymer mixture is an important factor in the development of new materials based on polymeric blends. In miscible polymeric blends, there are often specific interactions between functional groups or polymer segments that lead to decrease of the Gibbs energy of mixing. Miscible polymer blends present only one phase, while immiscible blends present separated domains, and the final properties of polymer blends are directly related to the degree of their miscibilities [9]. In immiscible polymer blends, their physical properties are poor compared with those of parent polymers because of phase separations arising from weak interaction at the boundaries of component polymers. The miscibility and the physical properties of polymer blends can be improved by applying intermolecular interaction such as hydrogen bonding and dipole-dipole interaction between blend components. Intermolecular hydrogen bonding interaction by hydroxyl, halogen, carbonyl, and amide groups leads to the improvement of miscibility based on favorable enthalpic interaction between polymer chains. Addition of compatibilizer into immiscible polymer blends also improves the miscibility and the physical properties [6,[9][10][11][12]. For polymer-polymer miscibility investigations, the most useful techniques are electronic microscopy [13], spectroscopy [14], and thermal analysis [15]. Electron beam irradiation of polymer blends has been employed in improving the properties and miscibility of blends. High energy irradiation produces free radicals that can readily interact with each other forming crosslinking and strengthening the polymer structure. The objective of this study is to determine the effect of electron beam irradiation on the structural, physical and chemical propert...

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“…Miranda et al used a combination of Fourier-Transform Infrared Spectroscopy (FT-IR) and PCA to elucidate the chemistry that occurs when poly(vinyl alcohol) (PVA) is cross-linked under ultraviolet (UV) irradiation using sodium benzoate as an initiator [118]. An aqueous solution of PVA and sodium benzoate was cast onto a glass plate and the solvent was allowed to evaporate.…”

Section: Classification and Chemometrics Problemsmentioning

confidence: 99%

Polymer Informatics

Adams

2010

Polymer Libraries

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Polymers are arguably the most important set of materials in common use. The increasing adoption of both combinatorial as well as high-throughput approaches, coupled with an increasing amount of interdisciplinarity, has wrought tremendous change in the field of polymer science. Yet the informatics tools required to support and further enhance these changes are almost completely absent. In the first part of the chapter, a critical analysis of the challenges facing modern polymer informatics is provided. It is argued, that most of the problems facing the field today are rooted in the current scholarly communication process and the way in which chemists and polymer scientists handle and publish data. Furthermore, the chapter reviews existing modes of representing and communicating polymer information and discusses the impact, which the emergence of semantic technologies will have on the way in which scientific and polymer data is published and transmitted. In the second part, a review of the use of informatics tools for the prediction of polymer properties and in silico design of polymers is offered.

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Ultraviolet‐induced crosslinking of poly(vinyl alcohol) evaluated by principal component analysis of FTIR spectra

Cited by 70 publications

References 12 publications

Changes induced by UV radiation in the presence of sodium benzoate in films formulated with polyvinyl alcohol and carboxymethyl cellulose

Changes induced by UV radiation in the presence of sodium benzoate in films formulated with polyvinyl alcohol and carboxymethyl cellulose

Characterization of Electron Beam Irradiated Poly Vinyl Alcohol/Poly Ethylene Glycol Blends

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