Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (12): 1108-1111.doi: 10.3866/PKU.WHXB19981210

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The Structure and Time Domain Dielectric Spectroscopy of Polydimethlsiloxane

Chen Min, Yu Shao-Min, Shen Han, Li Jing-De   

  1. Department of Physics,Zhongshan University,Guangzhou 510275
  • Received:1997-12-30 Revised:1998-03-09 Published:1998-12-15
  • Contact: Li Jing-De

Abstract:

The dielectric spectroscopy of polydimethylsiloxane is measured in temperature range of 190 to+120℃ The variation of frequency domain dielectric constant is very small, but time domain slow dielectric constants have high peaks at 120 and +80℃. According to H31 structure of molecule, the results can be explained. The time domain method can detect trace impurity of water to2×10-7 in polydimethylsiloxane.

Key words: Polydimethylsiloxane, Dielectric spectroscopy, Slow polarization effect