| 000 | 02921cam a2200349 a 4500 | ||
|---|---|---|---|
| 003 | EG-GiCUC | ||
| 005 | 20250223032320.0 | ||
| 008 | 190626s2019 ua dh f m 000 0 eng d | ||
| 040 |
_aEG-GiCUC _beng _cEG-GiCUC |
||
| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aPh.D | ||
| 099 | _aCai01.12.20.Ph.D.2019.As.S | ||
| 100 | 0 | _aAsmaa Mohamed Ismail Mohamed | |
| 245 | 1 | 0 |
_aSpectroscopic study and structural characterization of PEO/PVDF blend doped with inorganic nanoparticles / _cAsmaa Mohamed Ismail Mohamed ; Supervised Fawzy Hamed Abdelkader , Nagwa Abdelhakeem , Rania Saber Hafez |
| 246 | 1 | 5 | _aدراسة طيفية وتوصيف لمتراكبة من البولى إيثيلين أكسيد والبولى فينيلدين فلوريد المطعم بجسيمات نانومترية غير عضوية |
| 260 |
_aCairo : _bAsmaa Mohamed Ismail Mohamed , _c2019 |
||
| 300 |
_a127 P. : _bcharts , facsimiles ; _c25cm |
||
| 502 | _aThesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physics | ||
| 520 | _aThe present thesis deals with the preparation of blends of Poly (ethylene oxide) (PEO) and poly (vinylidene fluoride) (PVDF) films of compositions (50/50, 40/60, 30/70 and 20/80 wt/wt %) by casting technique. XRD, DSC and FT-IR were studied for all samples. (20/80 wt/wt %) PEO/PVDF blend provides the proper blending of these polymers. (20/80 wt/wt %) PEO/PVDF blend doped with concentrations 0.5, 0.7, 1.0, 2.0, 5.0 and 7.0 wt% Li₄Ti₅O₁₂NPs were prepared using casting technique. Structural, optical and thermal properties of polymer nanocomposites are investigated by using XRD, HRSEM, EDS, FT-IR, UV-Vis, DSC and TGA. Also, dielectric properties were studied. XRD, FT-IR and DSC data show that there is an interaction between the blend sample and Li₄Ti₅O₁₂ NPs. Also, the addition of Li₄Ti₅O₁₂ NPs decreases the degree of crystallinity of the blend sample. From TG data and the calculated activation energies revealed that the thermal stability of (20/80 wt/wt %) PEO/PVDF improves by addition of Li₄Ti₅O₁₂ NPs. HRSEM images reveal that the presence of Li4Ti₅O12 NPs leads to changes in the surface morphology of the nanocomposites and gives rise to crystalline domains up to 5wt% Li₄Ti₅O₁₂ NPs, then deteriorations is occurred. The addition of Li₄Ti₅O₁₂ NPs to the (PEO/PVDF) enhances the electrical conductivity of the blend attributed to charge carrier build up and increases in segmental mobility of polymeric chains | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aLi₄Ti₅O₁₂ | |
| 653 | 4 | _aPEO/PVDF | |
| 653 | 4 | _aXRD | |
| 700 | 0 |
_aFawzy Hamed Abdelkader , _eSupervisor |
|
| 700 | 0 |
_aNagwa Abdelhakeem , _eSupervisor |
|
| 700 | 0 |
_aRania Saber Hafez , _eSupervisor |
|
| 856 | _uhttp://172.23.153.220/th.pdf | ||
| 905 |
_aNazla _eRevisor |
||
| 905 |
_aShimaa _eCataloger |
||
| 942 |
_2ddc _cTH |
||
| 999 |
_c72591 _d72591 |
||