Mössbauer studies of iron doped poly(methyl methacrylate) before and after ion beam modification

Bulletin of materials science

D R S Somayajulu³  N V Patel³  M Sarkar³  D K Awasthi¹  C N Murthy² 

[1] Nuclear Science Centre, New Delhi 110 067, India$$Nuclear Science Centre, New Delhi 110 067, IndiaNuclear Science Centre, New Delhi 110 067, India$$;Applied Chemistry Department, Faculty of Technology and Engineering, MS University of Baroda, Vadodara 390 001, India$$Applied Chemistry Department, Faculty of Technology and Engineering, MS University of Baroda, Vadodara 390 001, IndiaApplied Chemistry Department, Faculty of Technology and Engineering, MS University of Baroda, Vadodara 390 001, India$$;Physics Department, Faculty of Science, MS University of Baroda, Vadodara 390 002, India$$Physics Department, Faculty of Science, MS University of Baroda, Vadodara 390 002, IndiaPhysics Department, Faculty of Science, MS University of Baroda, Vadodara 390 002, India$$

关键词: Ion beam modification;    poly(methyl methacrylate);    Mössbauer;    metal doping.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

High-energy MeV ions from accelerators are known to produce drastic modifications in polymers. The typical effects include chain scissions, crosslinks, molecular emission and double bond formation. Poly(methyl methacrylate) was doped with Fe(III) and irradiated with 95 MeV O⁷⁺ ions. ⁵⁷Fe-Mössbauer studies were done on the doped samples before and after irradiation. Before irradiation, no Mössbauer absorption was observed. The irradiated samples showed a good Mössbauer absorption, which seems to indicate that there is a significant interaction between the metal ion and the polymer matrix. Two possibilities exist at these doses (∼ 22 Ã�? 10¹² ions/cm): Fe(III) ions may be bridging the various polymer segments through crosslinking or amorphization of the sample leading to Feâ€�?�C bonding. Studies of FTIR, conductivity and glass transition temperatures on these samples support these observations.

【 授权许可】

Unknown