ATR-FTIR spectroscopy as a tool for studies of polymer-polymer miscibility

Braun, Dietrich; Böhringer, Bertram; Eidam, Norbert

doi:10.1007/bf00700270

Cited by 18 publications

(4 citation statements)

References 6 publications

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“…Such interactions between polar groups of two miscible polymers lead to small frequency shifts of absorption bands of the involved groups [247]. Analysis of multilayer polymer films can also be done by the same method in transmission mode [248].…”

Section: Principles Of Atrmentioning

confidence: 99%

Ion beam induced surface and interface engineering

Jain

Agarwal

2011

Surface Science Reports

261

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Section: Principles Of Atrmentioning

confidence: 99%

Ion beam induced surface and interface engineering

Jain

Agarwal

2011

Surface Science Reports

261

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“…More interestingly, the specific interactions present in the PPDO/PVPh blends have been investigated by FTIR. , Particularly, the location of the OH stretching band is related to the strength of the hydrogen bonding interactions. Figure shows the OH stretching region for PVPh and PPDO/PVPh blends of different composition.…”

Section: Validation Of the Modeling Analysis: Comparison With Experim...mentioning

confidence: 99%

Competing Specific Interactions Investigated by Molecular Dynamics: Analysis of Poly(p-dioxanone)/Poly(vinylphenol) Blends

et al. 2013

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Molecular dynamics simulations (MD) were carried out to model the miscibility behavior of blends of poly(p-dioxanone) (PPDO) with poly(vinylphenol) (PVPh). The Hildebrand solubility parameters of the pure polymers and the Flory-Huggins interaction parameters of the blends at different compositions were computed. Negative interaction parameters were found across the whole range of compositions, suggesting the miscibility of the system, in agreement with the experimental results. The interaction parameter obtained from melting point depression studies was also found to be in good agreement with the value computed from the simulations. The repeat unit of PPDO contains one ether and one ester group, and both can act as hydrogen bond acceptors. The radial distribution functions (RDFs) between those groups and the hydroxyl groups of PVPh were computed to investigate the competence between the acceptor groups for the specific interactions. The RDFs indicate that interassociation occurs mainly with the ester groups, which is detrimental to the ether groups. This result was also corroborated by the analysis of the hydroxyl stretching region of the blends using Fourier transform infrared spectroscopy (FTIR). The good overall agreement found between the simulated and the experimental data reveals the importance of the molecular modeling techniques in the analysis of the miscibility behavior of polymer blends.

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“…Attenuated total reflection Fourier-transformed infrared (ATR-FTIR) spectroscopy gives us information at molecular level for inorganic and organic constituents of bacterial EPS. It permits to investigate the functional groups in close proximity that are dipolar (Braun et al 1989). It is noninvasive, in situ method of spectroscopy that helps in the investigation of EPS constituents, functional group chemistry, and conformational changes without disturbing intermolecular associations of the constituents e.g.…”

Section: Introductionmentioning

confidence: 99%

Role of plant growth-promoting rhizobacteria and their exopolysaccharide in drought tolerance of maize

Naseem

Bano

2014

Journal of Plant Interactions

340

128

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The present study deals with the isolation and characterization of exopolysaccharides (EPS) produced by the plant growth-promoting rhizobacteria (PGPR) from arid and semiarid regions of Pakistan, and to investigate the drought tolerance potential of these PGPR on maize when used as bioinoculant alone and in combination with their respective EPS. Three bacterial strains Proteus penneri (Pp1), Pseudomonas aeruginosa (Pa2), and Alcaligenes faecalis (AF3) were selected as EPS-producing bacteria on the basis of mucoid colony formation. All these strains were gram negative, motile, and positive for catalase. Strain Pp1 was positive for oxidase test and was phosphate solubilizing, while Pa2 and AF3 were negative. The isolated strains were sequenced using 16SrRNA. Total soluble sugar, protein, uronic acid, emulsification activity, and Fourier-transformed infrared spectroscopy of EPS were determined. Drought stress had significant adverse effects on growth of maize seedlings. Seed bacterization of maize with EPS-producing bacterial strains in combination with their respective EPS improved soil moisture contents, plant biomass, root and shoot length, and leaf area. Under drought stress, the inoculated plants showed increase in relative water content, protein, and sugar though the proline content and the activities of antioxidant enzymes were decreased. The Pa2 strain isolated from semiarid region was most potent PGPR under drought stress. Consortia of inocula and their respective EPS showed greater potential to drought tolerance compared to PGPR inocula used alone.

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ATR-FTIR spectroscopy as a tool for studies of polymer-polymer miscibility

Cited by 18 publications

References 6 publications

Ion beam induced surface and interface engineering

Ion beam induced surface and interface engineering

Competing Specific Interactions Investigated by Molecular Dynamics: Analysis of Poly(p-dioxanone)/Poly(vinylphenol) Blends

Role of plant growth-promoting rhizobacteria and their exopolysaccharide in drought tolerance of maize

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