Guidelines for performing storage modulus measurements using the TA Instruments DMA 2980 three-point bend mode I. Amplitude effects

被引：47

作者：

Lee-Sullivan, P ^{[1
]}

Dykeman, D ^{[1
]}

机构：

[1] Univ New Brunswick, Dept Mech Engn, Fredericton, NB E3B 5A3, Canada

来源：

POLYMER TESTING | 2000年 / 19卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

The TA Instruments 2980 DMA was purchased with the assistance of a Natural Science and Engineering Research Council; Canada (NSERC) Equipment Grant awarded in 1996. The advice of Mr Terry Kelly and his technical assistance team at TA Instruments; New Castle; Delaware is gratefully acknowledged;

D O I：

10.1016/S0142-9418(98)00083-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An experimental study of the effects of oscillation amplitude on the elastic storage modulus, EI, for a rigid thermoplastic measured using three point-bending is presented. The results are part of a wider investigation on the operating conditions needed to improve repeatability and reproducibility of E' measurements for the recently commercialized TA Instruments 2980 Dynamic Mechanical Analyzer. It has been found that sample alignment is required to achieve reliable E' values. Based on experiments performed on polycarbonate at 1 Hz using a span-to-thickness ratio of 11, 17 and 33, respectively, the optimum amplitude for obtaining the lowest standard deviation under ambient conditions is found to be about 100 mu m. It is also found that a span-to-thickness ratio of < 17 is very sensitive to: changes in amplitude. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：155 / 164

页数：10