A model for destruction of the methyl silicone rubber net-structure after the synergistic radiation of proton and electrons

作者：Zhang, LX^*; Xu, Z; He, SY

来源：Acta Chimica Sinica, 2004, 62(7): 725-728.

• methyl silicone rubber
• synergistic radiation of proton and electron
• mass spectrum
• quantum chemistry calculation
• model for destruction

Synergistic radiation effect on methyl silicone rubber of protons and electrons was investigated using a ground-based simulator for space radiation environment. The energy of protons and electrons was chosen as 150 keV, and the fluence 10(16) cm(-2). The gas product is CH3Si(O)CH3 by mass spectrum after synthesized radiation. The quantum chemistry calculation indicated that the macro-molecule chains in the silicone rubbers could be fractured by a direct attack of H to the oxygen in the chains. This process was an only exothermic channel, giving out the heat of 655.34 kJ/mol. No stable transition states and intermediate products were formed, except for the fractured pieces of the chains. The calculation result was in agreement with the gas product CH3Si(O)CH3 formed by synergistic radiation of proton and electrons.

• 出版日期2004-4-14
• 单位上海交通大学; 哈尔滨工业大学