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|Title:||Modification of the optical, chemical and structural properties of 50 MeV 7Li+3 ion bombarded polyimide kapton-H|
|Authors:||Virk, H S|
Srivastava, A K
|Abstract:||The ion beam induced modification of polyimide (kapton-H) by 7Li+3 at 50 MeV has been studied by using UV-visible and FTIR techniques. The ion fluences ranging from 7.8×1010 to 0.94 ×1014 ions cm-2 have been used in order to study the optical, chemical and structural changes in polyimide. The observation of the recorded UV-visible spectra clearly shows three characteristics peaks at 338, 348, 360 nm, which shows an oscillatory behaviour corresponding to the magnitude of absorption with increasing dose. The FTIR spectra clearly indicate that there is only breakage of one of the bonds in imide ring of the repeating system without any scission in the back bone of the polymer. The general behaviour of the spectra of the polymer before and after irradiation is almost the same, indicating that this polymer is highly stable towards the electronic energy loss. The diffraction pattern of kapton indicates that mostly this polymer is in crystalline from along with a very small part in amorphous state. However, an appreciable change in diffraction pattern has been observed after irradiation.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.38(08) [August 2000]|
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