Notes-Cyanamide Derivatives. LIX. Preparation and Polymerization of Alkylenedicyanamide

Sugino, Kitchiro; Shirai, Kozo; Kitawaki, Rokuro

doi:10.1021/jo01068a610

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Iii4 Cyclotrimerization1

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“…Cyclotrimerization of compounds having several cyanamide groups underlies the synthesis of heatresistant polymers with a network structure due to formation of triazine rings [131]. Joint polycyclotri- 1399 merization of mono-and bis-cyanamides can be used to obtain polymeric products with different degrees of cross-linking, up to preparation of fusible and soluble polymers [132,133].…”

Section: Iii4 Cyclotrimerizationmentioning

confidence: 99%

Synthesis and chemical transformations of mono- and disubstituted cyanamides

Nekrasov

2004

Russ J Org Chem

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Section: Iii4 Cyclotrimerizationmentioning

confidence: 99%

Synthesis and chemical transformations of mono- and disubstituted cyanamides

Nekrasov

2004

Russ J Org Chem

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Preparation and characterization of biscyanamide resins containing o‐substituted groups or phenyl–ether linkage

Suzuki

Nagai

Suzuki

et al. 1991

J of Applied Polymer Sci

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SYNOPSISNew biscyanamides containing o-substituted groups or a phenyl-ether linkage were synthesized. The curing reaction behaviors of the biscyanamides were investigated. All the prepared biscyanamides began to polymerize as soon as they melted after being put on a heated plate beyond a certain temperature. The cured resins of each biscyanamides were prepared on the optimal conditions. Optimal conditions for cured resins were obtained from the curing reaction behaviors of each biscyanamide by differential scanning calorimetry (DSC) . The effect of chemical structures of the biscyanamides on the thermal and mechanical properties of the cured resins such as seen by thermal gravimetric analysis (TGA) , density, and flexural strength were studied. The introduction of alkyl groups into the ortho position decreased intermolecular interactions. The introduction of a long phenyl-ether linkage into the structure gave a broad exothermal peak in the DSC and good workability for the preparation of the cured resins. Moreover, the extension between cross-linkings improved the flexibility of the cured resins. The cured resins with fluorine-containing substituent groups also had better thermal stability in the air compared with hydrocarbon group resins.

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