Preparation of Silicon-Containing Polymer Synthesized by 60 Co-γ Rays Radiation and Research on its Ceramic Transformation
Polymers containing active silane groups were synthesized by 60 Co-γ rays radiation polymerization from the solu-tion of γ-methacryloxypropyltrimethoxysilane(KH570)/ethanol.The effect of radiation dosage on the polymerization and the mo-lecular weight of the product was investigated,and the ceramic properties and cleavage structure of the product were further stud-ied.The results indicate that KH570 has the highest polymerization degree at the radiation of 40 kGy with the molecular weight of 38.7×104,the polydispersity index is 8.24.The silicon-containing polymer exhibits good hydrolytic activity.When its cured res-in is pyrolyzed at 1 000℃ under a nitrogen atmosphere,the residual mass fraction is 38.8％.The pyrolysis product is a glossy,pure black amorphous ceramic containing Si—O—C bonds.X-ray photoelectron spectroscopy analysis reveals that the mass frac-tions of Si,O and C are 40.05％,43.65％,and 16.30％,respectively.
NETL
NSTL
万方数据
