The intrinsic viscosity of PEN chip subjected to solid state polymerization increased from 0 5 dL/g in the stage of melt polymerization to more than 0 7 dL/g.

 
  • 通過(guò)固相聚合后 ;PEN切片的特性粘數可由熔融聚合的 0 .;5 d L/g提高到 0
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