Results 91 to 100 of about 503 (112)
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Modification of epoxy novolak resin with polyamic acid, investigation of cocuring mechanism
Moscow University Chemistry Bulletin, 2011The processes of thermal curing in the epoxy novolak resin-polyamic acid system were investigated by means of high-temperature FTIR spectroscopy. It was shown that, under the conditions studied, the formation of copolymer took place, and the mechanism of cocuring changed depending on the concentration of modifying agent.
K. B. Vernigorov +4 more
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Simple way of fabrication of Epoxy Novolak Resin optical waveguides on silicon substrate
physica status solidi c, 2011AbstractIn this paper we report about design, fabrication and properties of the polymer optical waveguides deposited on silica‐on‐silicon substrate. The design of the waveguides is based on a concept that geometric dimensions of the single mode polymer waveguide are determined by geometrical parameters of the silica layer.
Vaclav Prajzler +6 more
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Journal of Thermal Analysis and Calorimetry, 2002
The curing agents of epoxy resin, trimethylsilyl ethers of phenol novolak (TMSPN) and cresol novolak (TMSCN) were prepared by refluxing phenol novolak and cresol novolak respectively, with the mixture of hexamethyldisilazane and chlorotrimethylsilane in THF. The curing reaction of epoxy resin with these curing agents and the thermal properties of cured
Y. Nishimoto, K. Ueoka, S. Nakamura
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The curing agents of epoxy resin, trimethylsilyl ethers of phenol novolak (TMSPN) and cresol novolak (TMSCN) were prepared by refluxing phenol novolak and cresol novolak respectively, with the mixture of hexamethyldisilazane and chlorotrimethylsilane in THF. The curing reaction of epoxy resin with these curing agents and the thermal properties of cured
Y. Nishimoto, K. Ueoka, S. Nakamura
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Optical properties of Dy3+doped epoxy novolak resin
SPIE Proceedings, 2008We report about properties of epoxy novolak resin polymer doped with dysprosium ions. The polymer layers were fabricated by spin-coating onto silicon substrates, or pouring epoxy novolak resin solution into bottomless molds placed on a quartz substrate and leaving them to dry.
Vaclav Prajzler +7 more
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Multifunctional epoxy Novolak resin for electrical insulations
Conference Record of the 1998 IEEE International Symposium on Electrical Insulation (Cat. No.98CH36239), 2002Synthetic polymers like epoxies have both electrical properties and very high heat resistance. Multifunctional epoxies from polyhydroxy phenolic compounds emerge as an important addition to the field of resins. Research and development was undertaken and special types of Novolaks were synthesized from phenol and formaldehyde using acid catalyst.
S. Sridhar, P. Sadasiva Murthy
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Optical properties of bi‐doped epoxy novolak resin containing Ce, Dy, and Y ions
Journal of Applied Polymer Science, 2011AbstractIn this article, we report on the optical properties of Bismuth doped Epoxy Novolak Resin (ENR) co‐doped with Dysprosium, Cerium, and Yttrium ions. The polymer layers containing 1.0 to 20.0 at % of Bismuth were fabricated by spin‐coating onto silicon or quartz substrates.
Václav Prajzler +6 more
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Synthesis and properties of a new o‐cresol novolak epoxy resin containing oxyethylene units
Die Angewandte Makromolekulare Chemie, 1990AbstractA new o‐cresol novolak epoxy resin containing oxyethylene units was synthesized and characterized. The mechanical, thermal, and dynamic mechanical properties of resins cured with methyl hexahydrophthalic anhydride were examined and compared to those of a conventional o‐cresol novolak epoxy resin (EOCN 1020).
Takao Iijima +2 more
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Optical Properties of Epoxy Novolak Resin Polymer Co-doped with Er3+ and Er3+/Yb3+ ions
2007 Conference on Lasers and Electro-Optics - Pacific Rim, 2007We report about a fabrication and properties of Er3+ and Er3+/Yb3+ ions doped epoxy novolak resin. The polymer layers were fabricated by a spin coating and using ErCl3 and YbCl3 or ErF3 and YbF3 dissolved in C5H9NO for the Er and Yb doping.
Vaclav Prajzler +4 more
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