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Synthesis and characterization of some bio-based poly (ester-urethane)s and their nanocomposites / Ahmed Muhammad Muhammad Elgamal ; Supervised Nahed Abdelfattah Abdelghany , Mohamed Samir Abdel Aziz Zedan

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Ahmed Muhammad Muhammad Elgamal , 2016Description: 88 P. : charts , facsimiles ; 25cmOther title:
  • تحضير وتوصيف بعض مواد البولي (إستر - يوريثان) ذات الطابع الحيوي والنانوكومبوزيتات الخاصة بها [Added title page title]
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Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry Summary: Polyurethanes (PUs) based on poly(3-hydroxybutyrate) (PHB) and polycaprolactone diols of different contents were synthesized using hexamethylene diisocyanate (HDI). Nanocomposites based on the prepared PUs and chitosan nanoparticles (CS-NPs) with different contents (0, 3,5 and 7 wt%) using solvent intercalation technique are also prepared. The structures of the prepared samples were verified by FTIR and 1H NMR. TEM confirmed the presence of chitosan within the nanometer range, and the homogeneous distribution of CS-NPs within the PUs matrix. SEM showed a roughness increment with increasing CS-NPs in the nanocomposites. DSC and XRD showed that the crystallization of PHB was retarded by increasing neither PCL or CS-NPs contents. Thermogravimetric analysis (TGA) showed that the thermal stability of the nanocomposites was decreased with CS-NPs incorporation
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.10.M.Sc.2016.Ah.S (Browse shelf(Opens below)) Not for loan 01010110072955000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.10.M.Sc.2016.Ah.S (Browse shelf(Opens below)) 72955.CD Not for loan 01020110072955000

Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry

Polyurethanes (PUs) based on poly(3-hydroxybutyrate) (PHB) and polycaprolactone diols of different contents were synthesized using hexamethylene diisocyanate (HDI). Nanocomposites based on the prepared PUs and chitosan nanoparticles (CS-NPs) with different contents (0, 3,5 and 7 wt%) using solvent intercalation technique are also prepared. The structures of the prepared samples were verified by FTIR and 1H NMR. TEM confirmed the presence of chitosan within the nanometer range, and the homogeneous distribution of CS-NPs within the PUs matrix. SEM showed a roughness increment with increasing CS-NPs in the nanocomposites. DSC and XRD showed that the crystallization of PHB was retarded by increasing neither PCL or CS-NPs contents. Thermogravimetric analysis (TGA) showed that the thermal stability of the nanocomposites was decreased with CS-NPs incorporation

Issued also as CD

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