Infrared Absorption Bands Characteristic of the Si—CH2CH2CN and Si—CH2CH2CH2CN Groups

Launer, Philip J.

doi:10.1366/000370268774383372

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…Characteristic adsorption peaks of –CH 2 (α)‐CH 2 (β)CH 2 (γ)CN in sample 6 are in the range of 1500 to 1300 cm −1 . Peaks at 1454 cm −1 , 1425 cm −1 , 1346 cm −1 are ascribed to α‐CH 2 ‐, –CH 2 (β), ‐CH 2 (γ), respectively. Meanwhile, the intensity of the peak at 1180 cm −1 ascribed to C‐H symmetric deformation of Si‐CH 2 increases accordingly with the C content.…”

Section: Resultsmentioning

confidence: 99%

“…Peaks at 1454 cm −1 , 1425 cm −1 , 1346 cm −1 are ascribed to α‐CH 2 ‐, –CH 2 (β), ‐CH 2 (γ), respectively. Meanwhile, the intensity of the peak at 1180 cm −1 ascribed to C‐H symmetric deformation of Si‐CH 2 increases accordingly with the C content. An absorption band in the region of 950‐750 cm −1 , originating from ‐CH 3 rocking and Si‐C stretching, is clearly visible.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis, characterization, and properties of hydroxyl‐terminated copolysiloxanes containing γ‐cyanopropyl groups

Dai

Gao

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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A series of random copolysiloxanes (PCDMS) containing various amount of γ‐cyanopropyl groups are prepared by a new method under mild conditions. Structures of the synthesized polymers are fully characterized by FTIR, 1H NMR, 29Si NMR, and GPC. Rheological properties of PCDMS are tested by cone and plate rheometer, and thermal properties by differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA). Damping properties as well as fuel resistance of the cured PCDMS elastomers are also tested. The correlation between chemical structure, content of cyanopropyl group and properties are discussed. With the increasing amount of polar cyanopropyl group introduced, glass transition temperatures (Tg) of the synthesized PCDMS gradually increases from −121 to −65 °C, residual weight increases from 0 to 36% at 800°C, loss factor reaches as high as 1.74, mass increase under fuel immersion for 14 days can be as low as 3.6%. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 1408–1421

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis, characterization, and properties of hydroxyl‐terminated copolysiloxanes containing γ‐cyanopropyl groups

Dai

Gao

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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“…3a) and were assigned to C-O-R stretching [19], indicating that glycerol is chemically bonded to the surface of the BG particles. The obtained results are in agreement with the Raman spectroscopy data, confirming that glycerol chemically interacts with the surface of BG particles through C\ \O\ \Si bounds.…”

Section: Resultsmentioning

confidence: 99%

Tailoring the viscoelastic properties of injectable biocomposites: A spectroscopic assessment of the interactions between organic carriers and bioactive glass particles

et al. 2016

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Injectable bioglass (BG) pastes were produced using a melt-quenched glass based on CaO-MgO-SiO 2 -Na 2 O-P 2 O 5 -CaF 2 and two organic carriers, namely polyethylene glycol (PEG) and glycerol (Gly). The interactions between the organic carriers and the surface of the BG particles were assessed by spectroscopic methods (Fourier Transform Infrared, Raman, as well as 29Si and 13C solid-state NMR spectroscopy) in order to understand their effects on the viscoelastic properties of the biocomposites. While pure physical interactions were detected between PEG and the surface of the BG particles, chemical bonding was observed between glycerol and BG, enhancing the network cross-linking degree. Accordingly, the BG network of Gly-BG pastes was more condensed (higher fraction of Q [3] units detected by Raman spectroscopy) in comparison to that of PEG-BG and bare BG. Such chemical interactions between the organic carrier and BG were shown to negatively affect the viscoelastic behaviour of the resulting pastes. Thus, the PEG-based biocomposite exhibited improved flowability in comparison to its analogous Gly-BG biocomposite.

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“…Thus, in the case of PNC based on UHMWPE and Si 3 N 4 , the new peaks on 810-800 cm -1 , apparently, corresponding to stretching vibrations of Si-O bonds were detected on the frictionsurfaces of PNC with Si 3 N 4 (Fig. 5) [16,17]. Probably, Si 3 N 4 might be oxidized during friction.…”

Section: Key Engineering Materials Vol 670mentioning

confidence: 91%

Structure and Friction Behavior of UHMWPE/Inorganic Nanoparticles

Охлопкова

Borisova

Охлопкова

et al. 2015

KEM

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We investigated tribological properties and worn surfaces morphology of polymer nanocomposite (PNCs) based on ultrahigh-molecular-weight polyethylene and aluminum and silicon oxide and nitride nanoparticle (NP) fillers by several methods to establish wear mechanisms. Joint mechanical activation in a planetary mill was used for the PNC preparation. PNCs with Al2O3 showed the best wear resistance. Scanning electron microscopy suggests that worn surfaces of PNCs with different fillers had different wear mechanisms. IR-spectroscopy and EDS analysis showed that oxidation processes occurred during friction and wear. Oxides of aluminum and silicon might be catalysts of oxidation processes. Due to tribochemical processes, cross-linked structures were formed on the PNCs surfaces. Probably, these cross-linked structures provide increase of wear resistance.

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Infrared Absorption Bands Characteristic of the Si—CH₂CH₂CN and Si—CH₂CH₂CH₂CN Groups

Cited by 5 publications

References 5 publications

Synthesis, characterization, and properties of hydroxyl‐terminated copolysiloxanes containing γ‐cyanopropyl groups

Synthesis, characterization, and properties of hydroxyl‐terminated copolysiloxanes containing γ‐cyanopropyl groups

Tailoring the viscoelastic properties of injectable biocomposites: A spectroscopic assessment of the interactions between organic carriers and bioactive glass particles

Structure and Friction Behavior of UHMWPE/Inorganic Nanoparticles

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