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Journal of Materials Science

, Volume 53, Issue 17, pp 12628–12640 | Cite as

Refractive index and polarizability of polystyrene under shock compression

  • Xuping Zhang
  • Guiji Wang
  • Binqiang Luo
  • Fuli Tan
  • Simon N. Bland
  • Jianheng Zhao
  • Chengwei Sun
  • Cangli Liu
Polymers

Abstract

The refractive index, polarizability and thermodynamic response of polystyrene under shock compression were investigated through experiments and theoretical analysis, and a relationship between the refractive index and the density, pressure and temperature of the polystyrene was obtained. Above a pressure of 20 GPa, an obvious inflexion was observed in how the refractive index of the polystyrene varied with the thermodynamic variables; in particular, it was found to depend strongly on the temperature (as obtained using a semiempirical complete equation of state). Relating the measured refractive index to the polarizability indicates that the polarizability decreased from 1.28 × 10−23 cm3 at ambient conditions, to 0.98 × 10−23 cm3 at pressure of 33 GPa, indicating that the lowest direct band gap \( E_{t} \) of polystyrene becomes < 2 eV, similar to that of many semiconductor materials.

Notes

Acknowledgements

The authors wish to thank Mr. Gang Wu, Chao Xu, Rongjie Shui, Xiao Ma, Shunyi Deng and Ran Qiao at IFP for their dedications to experimental operations on CQ4 and Abbe refractometer. This work was supported by the National Natural Science Foundation of China (Contract Nos. 11327803, 11502252), the project of Youth Innovation of Science and Technology of Sichuan Province (Contract No. 2016TD0022).

Compliance with ethical standards

Conflict of interest

The authors declare that the contents have no conflict of interest toward any individual or organization.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyangChina
  2. 2.Blackett LaboratoryImperial College LondonLondonUK
  3. 3.China Academy of Engineering PhysicsMianyangChina

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