000			03051cam a2200349 a 4500
003			EG-GiCUC
005			20250223032526.0
008			200222s2020 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aPh.D
099			_aCai01.12.11.Ph.D.2020.Ma.P
100	0		_aMarwa Eid Abdelaziz Mohamed
245	1	0	_aPreparation and characterization of some polypropylene/ layered silicates nanocomposites / _cMarwa Eid Abdelaziz Mohamed ; Supervised Gamal Riad Saad , Magdy Mikhail Naoum , Malak Taher Abouelkhair
246	1	5	_aتحضير وتوصيف بعض متراكبات البولى بروبلين / رقائق السيلكا الناومترية
260			_aCairo : _bMarwa Eid Abdelaziz Mohamed , _c2020
300			_a164 P. : _bcharts , facsimiles ; _c25cm
502			_aThesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physical Chemistry
520			_aPolypropylene /clay nanocomposites have been used extensively in a wide range of applications due to their enhanced properties compared to the properties of their constituents. The degree of enhancement in their properties depends on the extent to which their different phases are compatible with each other. In the present work the problem of incompatibility between the hydrophobic polypropylene (PP) polymer and the hydrophilic natural sodium montmorillonite clay (Na-MMT) in the polymer nanocomposites synthesis process, has been overcome by using PP grafted p-hydroxy-N-phenyl maleimide (PP-g-pHPMA) monomer as a compatibilizer and also by modifying the Egyptian natural sodium montmorillonite clay using two different organic surfactants. Four nanocomposite series were synthesized by melt reactive extrusion in a brabender twin screw extruder. The compatibilizer, the organoclay kind (OMMT1 or OMMT2) and the amount of added organoclay are the process parameters. The effect of compatibilizer and organoclay content on the properties of the prepared nanocomposites have been studied using X-ray Diffraction Analysis (XRD), Melt Flow Index measurements (MFI), Thermogravemetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), Scanning Electron Microscope (SEM), Oxygen Transmission Rate (OTR) and Water Vapor Transmission Rate measurements (WVTR) nanocomposites. SEM micrographs show the morphology of some of the prepared nanocomposites. Melt flow index results show a great increase in the value of the MFI by increasing the organoclay content and the increase is lower in the presence of compatibilizer
530			_aIssued also as CD
653		4	_aOrganically modified clay OMMT
653		4	_aPolypropylene
653		4	_aPP-gpHPMA compatibilizer
700	0		_aAlaa Ibrahim Ahmed Eid , _eSupervisor
700	0		_aGamal Riad Saad , _eSupervisor
700	0		_aMagdy Mikhail Naoum , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c76735 _d76735