A RHEOMETER TO MEASURE THE VISCOELASTIC PROPERTIES OF POLYMER MELTS AT ULTRASONIC FREQUENCIES

被引：9
|
作者：
THOMAS, V
GIACOMIN, AJ
WOLFENDEN, A
机构：
[1] TEXAS A&M UNIV,DEPT MECH ENGN,RHEOL RES LAB,COLLEGE STN,TX 77843
[2] TEXAS A&M UNIV,DEPT MECH ENGN,ADV MAT LAB,COLLEGE STN,TX 77843
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1994年 / 65卷 / 07期
关键词：
D O I：
10.1063/1.1144693
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A rheometer which uses a piezoelectric ultrasonic composite oscillator has been developed to measure the viscoelastic properties, G'(omega) and G''(omega), of polymer melts at ultrasonic frequencies. The storage and loss moduli of an ethylene-tetrafluoroethylene copolymer melt were measured at six frequencies in the range 0.25X10(6)-1.28X10(6) rad/s (between 40 and 200 kHz nominal frequency) and at a temperature of 280-degrees-C. This ultrasonic instrument operates at strain amplitudes ranging from about 10(-8) to 10(-3) and is therefore ideally suited for linear viscoelastic property measurements.
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页码：2395 / 2401
页数：7
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