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Standard ČSN ISO 9944 1.2.1994 preview

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ČSN ISO 9944 (641514)

Plastics. Phenolic resins. Determination of electrical conductivity of resin extracts



STANDARD published on 1.2.1994


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The information about the standard:

Designation standards: ČSN ISO 9944
Classification mark: 641514
Catalog number: 16111
Publication date standards: 1.2.1994
SKU: NS-180933
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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Thermosetting materials

Annotation of standard text ČSN ISO 9944 (641514):

Norma obsahuje ISO 9944:1990. Tato zkušební norma v Národní předmluvě uvádí mezi souvisícími normami ČSN 01 8003 - Zásady pro bezpečnou práci v chemických laboratořích. Předepisuje metodu stanovení elektrické vodivosti extraktů z fenolických pryskyřic při (23 ± 0,1) °C. Metoda je důležitá pro aplikace, v nichž jsou tyto pryskyřice použity jako impregnační materiály. Podstata zkoušky: K roztoku pryskyřice se přidá směs aceton/voda. Vzniklá sraženina se nechá usadit a změří se vodivost suspenze, která je nad pryskyřicí (sraženinou). Z naměřených hodnot se potom vypočítá vodivost pryskyřice. Postup při provádění normalizované zkoušky je podrobně popsán. ČSN ISO 9944 (64 1514) byla vydána v únoru 1994

These changes apply to this standard:

Preview ČSN ISO 9944:1994/1 1.11.1996
ČSN ISO 9944:1994/1 (641514) Change

Plasty - Fenolické pryskyřice - Stanovení elektrické vodivosti pryskyřičných extraktů.

Change published on 1.11.1996

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