METHOD OF DETERMINING THERMOPHYSICAL CHARACTERISTICS OF POLYURETHANE FOAMS

FIELD: polymer materials. ^ SUBSTANCE: method consists in that a heat-insulated surface is affected by in-the-line heat pulses with constant power and period. A series of foamed polyurethane samples with preliminarily determined and different heat- and temperature-conductivity are selected. In-the-l...

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Hauptverfasser:	OBUKHOV VLADIMIR VASIL'EVICH, OBUKHOVA LJUDMILA VASIL'EVNA
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	FIELD: polymer materials. ^ SUBSTANCE: method consists in that a heat-insulated surface is affected by in-the-line heat pulses with constant power and period. A series of foamed polyurethane samples with preliminarily determined and different heat- and temperature-conductivity are selected. In-the-line action by heat pulses is accomplished on the surface of each of the samples one after another, during which procedure three temperatures Tn1, Tn2, and Tn3 are recorded in pulse delivery moments n1, n2, and n3. From data obtained calibration curves are plotted for heat-conductivity as function of temperature difference (Tn2-Tn1) and for temperature-conductivity as function of temperature difference ratio (Tn2-Tn1)/(Tn3-Tn1). By using thus obtained calibration curves, sought characteristics are obtained. ^ EFFECT: increased determination accuracy. ^ 4 dwg, 1 tbl