1. In situ synthesis of copolymers based on polyvinylpyrrolidone and condensation polymers and their use as optical fiber coatings
- Author
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Evgeniy A. Plastinin, Sergei L. Semjonov, D. A. Sapozhnikov, B. A. Bayminov, Alexey F. Kosolapov, and Yakov S. Vygodskii
- Subjects
chemistry.chemical_classification ,Condensation polymer ,Materials science ,Polyvinylpyrrolidone ,General Chemical Engineering ,Organic Chemistry ,02 engineering and technology ,Polymer ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,Aramid ,chemistry ,Polymerization ,Chemical engineering ,Polymer chemistry ,Materials Chemistry ,medicine ,Copolymer ,In situ polymerization ,0210 nano-technology ,Polyimide ,medicine.drug - Abstract
The copolymers of N-vinyl-2-pyrrolidone (N-VP) and condensation cardo and/or fluorinated condensation polymers (aromatic polyamide, polyimide and polyarylate) were synthesized by free radical in situ polymerization. The partial formation (14–61 wt%) of polivnylpyrrolidone (PVP) homopolymer upon the polymerization of N-VP containing dissolved condensation polymer was stated. Synthesized (co)polymers are differed in heat resistance and solubility from neat PVP. Using relevant copolymers solutions in N-methyl-2-pyrrolidone the optical fiber coatings having good adhesion properties were fabricated. Such coatings demonstrate high stability at elevated temperatures. A substantial number of defects on coatings and a slight decrease in bending strength are observed only on exposure at 200 °C for 72 h. Simultaneously holding for 1 and 24 h at the same temperature leads to hardening of the fibers: bending strength changes from ∼5 up to 6 GPa.
- Published
- 2016