Creep performance of PVC aged at temperature relatively close to glass transition temperature

doi:10.1007/s10483-012-1610-x

Applied Mathematics and Mechanics (English Edition) ›› 2012, Vol. 33 ›› Issue (9): 1129-1136.doi: https://doi.org/10.1007/s10483-012-1610-x

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Creep performance of PVC aged at temperature relatively close to glass transition temperature

Zhi-hong ZHOU^1,3, Yao-long HE^2,4, Hong-jiu HU^2,4, Feng ZHAO^2,4, Xiao-long ZHANG^2,4

1. School of Civil Engineering, Southeast University, Nanjin 210096, P. R. China;
2. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China;
3. Jiangsu Key Laboratory of Engineering Mechanics Analysis, Nanjing 210096, P. R. China;
4. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, P. R. China

Received:2012-03-16 Revised:2012-05-03 Online:2012-09-10 Published:2012-09-10
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 10672095 and 11072137) and the Shanghai Leading Academic Discipline Project (No. S30106)

Abstract

Abstract: In order to predict the mechanical performance of the polyvinyl chloride (PVC) at a high operating temperature, a series of short-term tensile creep tests (one-tenth of the physical aging time) of the PVC are carried out at 63 ℃ with a small constant stress by a dynamic mechanical analyzer (DMA). The Struik-Kohlrausch (SK) formula and Struik shifting methods are used to describe these creep data for various physical aging time. A new phenomenological model based on the multiple relaxation mechanisms of an amorphous polymer is developed to quantitatively characterize the SK parameters (the initial creep compliance, the characteristic retardation time, and the shape factor) determined by the aging time. It is shown that the momentary creep compliance curve of the PVC at 63 ℃ can be very well fitted by the SK formula for each aging time. However, the SK parameters for the creep curves are not constant during the aging process at the elevated temperatures, and the evolution of these parameters and the creep rate versus aging time curves at the double logarithmic coordinates have shown a nonlinear phenomenon. Moreover, the creep master curves obtained by the superposition with the Struik shifting methods are unsatisfactory in such a case. Finally, the predicted results calculated from the present model incorporating with the SK formula are in excellent agreement with the creep experimental data for the PVC isothermally aged at the temperature relatively close to the glass transition temperature.

Key words: complex quaternion ring, quaternion field, matrix, diagonalization matrix

2010 MSC Number:

TQ323.41

Zhi-hong ZHOU;Yao-long HE;Hong-jiu HU;Feng ZHAO;Xiao-long ZHANG. Creep performance of PVC aged at temperature relatively close to glass transition temperature. Applied Mathematics and Mechanics (English Edition), 2012, 33(9): 1129-1136.

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References

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Creep performance of PVC aged at temperature relatively close to glass transition temperature

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