تحضير ودراسة الانتقالات الالكترونية للمواد المتراكبة من البولي يوريثان وصبغة البنفسج البلوري PU/CV والبولي يوريثان وصبغة الحمراء المتعادلة PU/NR == Synthesis And Study of the electronic Transition of Polymer Composite polyurathane , Crystal Violet (PU/CV) And polyurethane,Neuteral Red (PU/NR
Author name:
عماد عبد الرضا عريبي
Supervisor name:
علي قاسم عبد الله
General topic:
Physics
Specific topic:
Electronics Physics
Degree:
Master
University:
University Of Basrah - College Of Science
Language:
Arabic
University location:
Basrah
First pages:
26T1686 - p.pdf
Abstract:
In equals weight percent age adding to them the organic dyes ,crystal violet (CV) and natural red dye (NR) were applied as indicator in bioapplication in percentage weight (10% ,20% ,30% ,40% ,50%) thin films were prepration by to methods, firest by spin coating to optical properties and cast methods to electrical properties thin films characterization by FTIR to estimated the functional groups forPU and dyes , were the charts indicated the reaction between the PU and NR , while the mix between PU and CV are polymer compositen TO study the crystallinty of thin films we are use the XRD , the result shows amorphas structers Optical properties were studies in wavelength range (300 - 900 nm) , and From absorption and transmittance spectra we are estimated some optical Parameters like the absorption coeffici ent (α) The thin films have Sharpe absorption edge and the indirect transition while Direct transition to percentage (40% , 50%) the indirect transition to PU/NR Thin films the energy gap increasing with increase the wight percentage to To PU/CV while decreasing to PU/NR thin films and the values (1.53 - 1.93eV ) , (1.83 - 1.78eV ) respectively . Urbach energy (Eu) were also calculated and increasing the value of urbach States with increase the weight percentage for all thin films prepared . TheSome optical parameters can be calculated such as extication coefficient (K) And refractive index (n) , the real and imaginary parts(1,2 ) and the optical, Electrical conductivities (opt ,e ) as function to photon energy . W - D model adopted to estimated some optical paramters such as ( λο , N/mο , Sο , e ,eo , nο , M - 3 , M - 1 , Eο ,Ed ) All parameters tabulated , the PU/CV were more response from the PU/NR Electrical conductivity studies for thin films prepared by al (PU/CV) , (PU/NR)/AL and from measuring the current - olage / Al Characterization we calculated the electrical conductivity and activation energy accompanying electrical conductance operation and the value were (610 - 10 - 1.210 - 8 S/cm ) , (0.84 - 0.57eV ) ,(210 - 12 - 8.3510 11 S/cm ) ,(0.46 - 0.56eV ) respectively . We can see the conductivity value for PU/CV larger than the value of PU/NR and with increase and decrease because these related to the mix and Time preparation of PU/CV and PU/NR and the final is reaction between PU and NR dye not physical mix
