The combined effects of hydrostatic pressure and temperature on the performances of polymer syntactic foams

doi:10.19936/j.cnki.2096-8000.20211128.007

Abstract

Abstract: An experimental investigation on the aging of a syntactic foam with a nominal density of 475 kg/m³ was carried out under the combined effects of a hydrostatic pressure of 30 MPa and a variety of water temperatures ranging from 15 ℃~60 ℃. The samples were aged for a variety of time periods ranging from 1 day to 30 days. And their water absorption rate, compressive strength and modulus of elasticity were tested. The results indicate that the water absorption rate of the polymer syntactic foams increases with increasing water temperature and aging time, while their compressive strength decreases with the same environmental factors. Their modulus of elasticity shows different trends under lower and higher water temperatures: It slightly increases with aging time under a relatively low water temperature, but decreases with aging time under the higher water temperature. The mechanisms driving the change of the performances of the syntactic foam under the combined effects of pressure and temperature were analyzed. And a characteristic relationship between the compressive strength and the water absorption rate was shown. A method for the prediction of the long-term performance of the syntactic foam through extrapolation from the short-term test data has also been established.

Key words: polymer syntactic foam, hydrostatic pressure, water temperature, water absorption rate, compressive strength, modulus of elasticity

CLC Number:

TB332

LIU Gang, QU Yan, JU Er-fan, WANG Zhao, ZOU Ke. The combined effects of hydrostatic pressure and temperature on the performances of polymer syntactic foams[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(11): 44-48.

References

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