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Polymer impregnation of macro-defect-free cements (1989)

Chandrashekhar, G. V. ; Shafer, M. W.

Springer

Journal of materials science 24 (1989), S. 3353-3355

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ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract Impregnation of MDF cements based on Secar-71 with high-strength heat-resistant polymers, like the novolac epoxies, produces composites with vastly improved properties. Some typical properties are: (1) at 1 MHz and 0% relative humidity, dielectric constant of 8 to 9, dissipation factor of 0.005 to 0.008, and d.c. resistivity of about 1013 Ω cm; (2) less than 5% increase in dielectric constant after exposure to 90% humidity for extended periods of time; (3) flexural strengths of 150 to 200 M Pa; and (4) thermal stability up to 350° C.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01139064

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