Determining Zero Shear Viscosity of Polycarbosilane Melts

Ziqing Zhu; Liu Ying Huang; Xuan Cheng; Ying Zhang

doi:10.4028/www.scientific.net/KEM.726.95

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 726Determining Zero Shear Viscosity of...

Determining Zero Shear Viscosity of Polycarbosilane Melts

Abstract:

As an important precursor in preparation of silicon carbide ceramic fibers by polymer precursor-derived method, it is very difficult to find the zero shear viscosity through the conventional steady test for the oligomer-like polycarbosilane (PCS) because of the possible oxidation and a prolonged time required to attain a steady state of the samples. In this work, a steady test and a series of transient tests were performed for the PCS melts. The limitation of the steady test is discussed. An averaging method based upon data from the transient tests is developed to determine the zero shear viscosity for the melt. The reliability of the results from the method is discussed and the zero shear viscosity of the pretreated PCS melt was obtained.

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Periodical:

Key Engineering Materials (Volume 726)

Pages:

95-99

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.726.95

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Online since:

January 2017

Authors:

Ziqing Zhu, Liu Ying Huang, Xuan Cheng, Ying Zhang

Keywords:

Apparent Viscosity, Oligomer, Polycarbosilane, Steady Test, Transient Test

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References

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