Effect of molecular weight on isothermal activation energy of PAMS thermal degradation

Chen Miao; Zhang Zhanwen; Huang Yong; Shi Ruiting; Yi Yong; Wang Hongbin

doi:10.11884/HPLPB201830.180184

Volume 30 Issue 11

Nov. 2018

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Chen Miao, Zhang Zhanwen, Huang Yong, et al. Effect of molecular weight on isothermal activation energy of PAMS thermal degradation[J]. High Power Laser and Particle Beams, 2018, 30: 112001. doi: 10.11884/HPLPB201830.180184

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Chen Miao, Zhang Zhanwen, Huang Yong, et al. Effect of molecular weight on isothermal activation energy of PAMS thermal degradation[J]. High Power Laser and Particle Beams, 2018, 30: 112001. doi: 10.11884/HPLPB201830.180184

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Effect of molecular weight on isothermal activation energy of PAMS thermal degradation

doi: 10.11884/HPLPB201830.180184

1.
School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
2.
Research Center of Laser Fusion, CAEP, P. O. Box 919-988, Mianyang 621900, China

Received Date: 2018-06-29
Rev Recd Date: 2018-09-10
Publish Date: 2018-11-15

Abstract

Abstract

Poly-α-methylstyrene (PAMS) is one of the most important mandrel materials used in the fabrication of laser inertial confinement fusion (ICF) targets. The effects of the molecular weight on the degradation products and degradation temperature of PAMS were investigated using fast pyrolysis gas chromatography-mass spectrometry (Py-GC-MS), thermogravimetric analysis (TG/DTG) and isothermal degradation activation energy of PAMS was calculated by Arrhenius equations. The Py-GC-MS results show that the pyrolysis of PAMS was found to yield α-methylstyrene monomer exclusively.Moreover, it also suggested that the effect of molecular weight on the degradation products of PAMS can be neglected. The TG results indicate that the thermal degradation temperature decreases as the molecular weight of PAMS increases, and the main thermal degradation temperature ranges from 240 to 450 ℃.Finally, with the decrease of molecular weight and the increase of thermal degradation rate, the activation energy of thermal degradation of PAMS increases.
- poly-alpha-methylstyrene,
- thermal degradation,
- molecular weight,
- activation energy,
- inertial confinement fusion (ICF)

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References(20)

References

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