کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10674891 | 1010476 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physical and chemical response of 145Â MeV Ne6+ ion irradiated polymethylmethacrylate (PMMA) polymer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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![عکس صفحه اول مقاله: Physical and chemical response of 145Â MeV Ne6+ ion irradiated polymethylmethacrylate (PMMA) polymer Physical and chemical response of 145Â MeV Ne6+ ion irradiated polymethylmethacrylate (PMMA) polymer](/preview/png/10674891.png)
چکیده انگلیسی
Characterization of ion induced modifications in the physical, chemical and structural properties of polymethylmethacrylate (PMMA) polymer induced by 145Â MeV Ne6+ ions has been carried out by FTIR, UV-Visible, Differential scanning calorimetry (DSC) and X-ray diffraction. Heavy ion irradiation was carried out under a vacuum of â¼10â6 torr at Variable Energy Cyclotron Centre, Kolkata, India using a low beam current (â¼15Â nA). Ion fluences of 1010, 1011, 1012, 1013 ions/cm2 were used. The optical band gap (Eg), calculated from the absorption edge of the UV-Vis spectra of these films in 200-800Â nm region varied from 2.167Â eV to 1.512Â eV for virgin and irradiated samples. In FTIR spectra appreciable changes have been observed after irradiation, indicating the molecular fragmentation, cross-linking, formation of unsaturated groups and free radicals. DSC thermograms give information about the thermal stability and type of thermal reactions (exothermic/endothermic) on the application of heat to the polymer. XRD analyses show slight shift of peak position and significant changes in peak intensity. XRD results show a decrease of â¼4.12% in crystallite size of irradiated sample at the higher fluence of 1012 ions/cm2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 269, Issue 14, 15 July 2011, Pages 1755-1759
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 269, Issue 14, 15 July 2011, Pages 1755-1759
نویسندگان
Rajesh Kumar, S.A. Ali, Paramjit Singh, U. De, H.S. Virk, Rajendra Prasad,