8990

8335

كارشناسي ارشد

الياف پليمري

اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي

1392

سيزده،81ص.: مصور،جدول،نمودار

ص.ع.به فارسي و اگليسي

صديقه برهاني

مصطفي يوسفي، مرتضي صادقي

18/3/93

عبدالكريم حسيني، شادپور ملك پور

مهندسي نساجي

ID8335

83 Feasibility fabrication of PMMA polymer optical nanofiber and its properties Maryam Mirzaei m mirzaei@tx iut ac ir Date of Submission 2014 04 9 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language PersianSupervisor Sedighe Borhani sborhani@cc iut ac ir AbstractPolymer optical fibers due to their flexibility low weight easy fabrication and low production cost in spiteof attenuation have been considered more during recent years in comparison with glass optical fibers Inthis research production feasibility of polymeric optical nanofibers POF by electrospinning and itscharacteristics have been considered Polymethyl methacrylate PMMA because its wide use in opticalliterature POF compatibility processability and the low cost in the production of nanofibers has been usedas a core of the optical fiber To produce oriented optical fibers with appropriate length and to coat theoptical fibers nanofiber yarn production method and dip coating method were utilized respectively Themeasurement of optical properties of samples showed that the produced nanofibers did not have opticaltransition properties however the produced film had optical transition around 90 as a result non opticaltransition by nanofibers could be attributed to non transparency instead of the produced film The change inelectrospinning parameters such as voltage concentration and solvent type did not have any effect on thetransparency of the produced nanofibers Therefore the structure of nanofibers and the film of PMMA wereconsidered Evaluation of differential scanning calorimeter DSC revealed that the glass transitiontemperature of nanofibers and the film of PMMA were 49 61c and 58 86c respectively Furthermore by theobservation of X ray scattering in the wide angle WAXS the amorphous nature of samples and thedistance between polymer chains were gained showing a good agreement with the results obtained fromDSC test The results obtained by low angle X ray diffraction LAXRD also showed the possibility of thepresence of structural arrangement closed voids and three dimensional surface fractal in the nanofibers aswell as the presence of mass fractal in the polymeric film Assessment and computations of the resultsrelated to small angle X ray scattering SAXS showed the presence of spherical and rod shaped articles inthe nanofibers and the film of PMMA with gyration radius of 16 5 and 8 51 nm respectively Keywords Polymer optical fibers Nanofiber yarn Differential scanning calorimetery Wide angle X Rayscattering Low angle X ray diffraction Small angle X ray scattering

صديقه برهاني

مصطفي يوسفي، مرتضي صادقي

عبدالكريم حسيني، شادپور ملك پور