Digest on Literature on Dielectrics Volume X (1947) / Chapter Skim
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Synthetic Plastic Insulation
Synthetic Plastic Insulation
Pages 80-92
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From page 80... ...
Some of the ~na30r clevelo~.ents in plastics insulation are re~rie,-,red und.er the Boll owing subtopics: general Articles The ory S4Gendard Plastic Materials Silic ones lfire and Cable Insulation Di electri c Heeting Genera] Ar fiches .~ Plastics are useful in electrical applications because o' they r unique combs nation of Properties, the most important of these being good dielectric properties, mechanical strength, end ease of fabrication.
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From page 81... ...
In insulators the occupied energy bands in the atoms are compel Ethel jr filled, :~.~i' e conduction in mete.1 ~ i ~ e.s ~ oc fated ~ th inc obsolete I,y ~ ill ed banes . Di ele c tric breakdown occurs ashen electrons are continuous]
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From page 82... ...
Standard Plastic Mat eriale ~D~ The dlelectrlc constants and power factors of pure and modified phenol _ formaldehyde resins have been determined over a wide range of frequenci es23. The dielectric constants of both cured and uncured resins decrease gradually with increasing frequency.
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From page 83... ...
The first flee concern styrene monomer Physical Properties, Chemistry, Analysis, Managing and Polymerization`. The last chapter covers analytical methods for Polystyrene36a.
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From page 84... ...
used in C1ass ~ insulation. The flow dielectric loss factor, high dielectric c trength,, high incus atiort re Distance, and good arc resistance indicate uses in the insulation of electronic circuits Where the above requirements along Keith high heat resistance are reC:uired47~4S.
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From page 85... ...
Te.bles are given shooting the hyslce1 Cedric and electrical ~ro~e-~ties of polyvinyl chloridet4, 65 ~ Polyethylene is the most Tritely used synthetic di_ electric in low 108B, high frequency coaxial cables66~67~68. The properties of butyl insulation for refire and cables has been diCcuesed69.
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From page 86... ...
The constant frequency reGuirement bores intro problems namely, to maintain a. constant frequency of operP,.tion Id to force the generator to this frequency.
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From page 87... ...
-~lO. Modern Plastics Encyclopedia The Modern Plastics Encycl opedialll for 1947 has appeared in three ~rol,;~mes.
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From page 89... ...
Assoc., 29, 109_28, June ~ 1946 ) 36ae The Dow Chemical Company' Mi]
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From page 90... ...
(1946) Modern Plastics, 24, No.
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From page 92... ...
ill . Plas tics Catalog Corporation, 122 East 42nd Street, we York 17, Never York (1947)
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