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Standard Test Methods for Determination of Solution Viscosities of Polyamide (PA)
Automaticky přeložený název:
Standardní zkušební metody pro stanovení viskozitou roztoku polyamidu ( PA )
NORMA vydána dne 1.4.2015
Označení normy: ASTM D789-15
Poznámka: NEPLATNÁ
Datum vydání normy: 1.4.2015
Kód zboží: NS-587579
Počet stran: 7
Přibližná hmotnost: 21 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
Brookfield viscosity, density of polyamide polymer-formic acid solution, pipet viscosity, relative viscosity,, ICS Number Code 83.080.20 (Thermoplastic materials)
Significance and Use | ||||||||||||||||
4.1 These test methods are intended for use as control and acceptance tests. They are also applicable in the partial evaluation of materials for specific end uses and as a means for detecting changes in materials due to specific deteriorating causes. 4.2 The steps involved in running this method are: 4.2.1 Calibration of the viscometers, 4.2.2 Preparation of solutions, 4.2.3 Determination of efflux time, 4.2.4 Calculation of relative viscosity (which requires the following), 4.2.4.1 Determining the density of the polymer/formic acid solution, and 4.2.4.2 Determining the absolute viscosity of the formic acid used. 4.3 Viscosity for groups 03, 04, and 05
(PA11, PA12, and PA6,12) in Classification System D6779 shall be measured using solvents
other than formic acid. Relative viscosities for Groups 03 and 04
shall be measured using 0.5 g of polymer dissolved in 99.5 g of
m-cresol at 25.0 ± 0.1°C in a Cannon-Fenske No. 200 viscometer.
Inherent viscosity of Group 05 shall be measured using 0.5 g of
polymer dissolved in 100 mL of m-cresol at 25.0 ± 0.1°C in a
Cannon-Fenske No. 200 viscometer. The inherent viscosity is
calculated as follows:
Poslední aktualizace: 06.05.2024 (Počet položek: 2 897 584) |