In situ synthesis of copolymers based on polyvinylpyrrolidone and condensation polymers and their use as optical fiber coatings

Vygodskii, Yakov S.; Sapozhnikov, D. A.; Bayminov, B. A.; Semjonov, S. L.; Косолапов, А. Ф.; Plastinin, E. A.

doi:10.1016/j.porgcoat.2016.05.023

Cited by 14 publications

(12 citation statements)

References 16 publications

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“…Moreover annealing the fibers for 1 h at 350 °C leads to their hardening. This reinforcement can be caused by the complete removal of residual solvent from the coating upon its thermal treatment at the temperature close to PA 4 T g that was also observed for the fibers coated with polyvinylpyrrolidone copolymers . Dramatic decrease in bending strength of such fibers (30%) has been observed only after 24 h annealing at 350 °C (Figure e).…”

Section: Resultsmentioning

confidence: 53%

“…We have checked the compatibility of the obtained PAs with the optical fiber drawing process on a special drawing tower and tested optical fibers with the new coatings.…”

Section: Resultsmentioning

confidence: 99%

“…The fiber coatings fabrication was realized on a special 9 m drawing tower . The fiber 125‐µm‐diameter was passed at the speed ∼15 m · min −1 through a specially designed drawing die (small vessel having a calibrated 250‐µm‐diameter hole in its bottom) containing PA solution.…”

Section: Methodsmentioning

confidence: 99%

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Synthesis and Study of Organosoluble Aromatic Cardo (co)polyamides and Their Application in the Optical Fiber Primary Coating Technology

Sapozhnikov

Bayminov

Popova

et al. 2017

Macromolecular Symposia

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A series of organosoluble aromatic cardo copolyamides (PA) with chlorine and carboxylic side groups has been synthesised by low‐temperature polycondensation in N‐methyl‐2‐pyrrolidone (N‐MP) solution and their properties have been estimated. The obtained polymers are differed in high molar masses (ηinh = 0.7 ÷ 1.8 dL/g) and demonstrate the following thermal characteristics: 300 °C < Tg < 390 °C; 425 °C < T10% < 510 °C (in air). PA films are characterized by high tensile strength (100 ÷ 230 MPa) and modulus (1.6 ÷ 2.3 GPa). It was stated the obtained PAs form the high quality coatings with good adhesion to the optical fiber surface without any additional coupling agent. The fibers with elaborated PA coatings demonstrate high thermal stability. The study of the optical fiber bending strength before and after thermal tests has shown that this parameter decreases by 10% only after prolonged exposure to high temperatures, namely, 72 h at 200–300 °C. Some samples withstand more than 1 h treatment at 350 °C without any changes of the optical fiber bending strength.

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Section: Resultsmentioning

confidence: 53%

“…We have checked the compatibility of the obtained PAs with the optical fiber drawing process on a special drawing tower and tested optical fibers with the new coatings.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Study of Organosoluble Aromatic Cardo (co)polyamides and Their Application in the Optical Fiber Primary Coating Technology

Sapozhnikov

Bayminov

Popova

et al. 2017

Macromolecular Symposia

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show abstract

“…To coat the optical fibers a few samples of PCA composites as HCOOH solution have been prepared. The fiber coatings fabrication was realized in accordance with published procedure . Drawing parameters are: the thickness of the initial fiber is 110 µm, drawing speed is 10 m min −1 , diameter of drawing die hole is 250 µm, the temperature of drying oven is 300°C.…”

Section: Methodsmentioning

confidence: 99%

Polycaproamide Modified by Single‐Walled Carbon Nanotubes as Protective Coating for Optical Fiber

Zabegaeva

Sapozhnikov

Baiminov

et al. 2017

Macromolecular Symposia

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New optical fiber coatings based on polycaproamide modified by carbon nanotubes have been tested. Nanocomposites were fabricated by in situ anionic polymerization of ϵ‐caprolactam in the presence of 0.005–0.01 wt.% single‐walled carbon nanotubes functionalized with polyimide. It was found that obtained nanocomposites are able to form high‐grade, heat and water resistant optical fiber coatings with improved mechanical strength. These as prepared fiber coatings are differed in high bending strength (∼6 GPa). Annealing for 3 and 72 h at temperatures high as 250 and 200°C respectively reduces the bending strength of such coated optical fiber by no more than 5%.

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“…Vinyl monomers are well-known and commercially available materials that can undergo chain-polymerization reactions, such as radical polymerization, anionic polymerization, and cationic polymerization. − The polymerization products of vinyl monomers are widely used in the manufacture of rubber, plastics, and coatings. − However, traditional organic solvents for these chain polymerizations often pollute the environment through evaporation or leakage. The use of ionic liquids (ILs) as green solvents has been extensively studied because of their attractive properties, such as their negligible vapor pressures, low melting points, good thermal stabilities, tunability, and chemical inertia. − ILs are regarded as polar but noncoordinating solvents with a high charge density because of their ionic nature, so they do not behave as simple solvents for polymerization.…”

Section: Introductionmentioning

confidence: 99%

Solubility of Monomers for Chain Polymerization in Ionic Liquids Predicted by the Conductor-Like Screening Model for Real Solvents

Zhang

Guo

et al. 2017

Ind. Eng. Chem. Res.

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Ionic liquids have been extensively investigated as clean solvents for chain polymerization reactions, such as radical polymerization, anionic polymerization, and cationic polymerization. However, the low solubilities of the monomers in ionic liquids often impede the efficiency of these reactions. In this study, the solubilities of two typical vinyl monomers, namely, p-methylstyrene (p-MeSt) and isobutyl vinyl ether (IBVE) were studied in 1750 possible ionic liquids (combinations of 50 cations with 35 anions) by the conductor-like screening model for real solvents. The effects of the cation structures, anion structures, and ion chain length on the solubility were systemically studied. The interaction energies and σ profiles were also employed to explain major factors affecting solubility. The results revealed that a larger size of the nonpolar region of the cation or anion results in higher solubilities for p-MeSt and IBVE, as does a longer alkyl chain in cation or anion. In this study, a theoretical method for selecting ionic liquids for chain polymerization was established.

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In situ synthesis of copolymers based on polyvinylpyrrolidone and condensation polymers and their use as optical fiber coatings

Cited by 14 publications

References 16 publications

Synthesis and Study of Organosoluble Aromatic Cardo (co)polyamides and Their Application in the Optical Fiber Primary Coating Technology

Synthesis and Study of Organosoluble Aromatic Cardo (co)polyamides and Their Application in the Optical Fiber Primary Coating Technology

Polycaproamide Modified by Single‐Walled Carbon Nanotubes as Protective Coating for Optical Fiber

Solubility of Monomers for Chain Polymerization in Ionic Liquids Predicted by the Conductor-Like Screening Model for Real Solvents

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