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Synthesis and Characterization of some Bin-Based Poly "Ester-Urethane"s and their Nan-Ocomposites

المصدر: مجلة القراءة والمعرفة
الناشر: جامعة عين شمس - كلية التربية - الجمعية المصرية للقراءة والمعرفة
المؤلف الرئيسي: El Gamal, Ahmed Muhammad Muhammad (Author)
مؤلفين آخرين: Saad, Gamal Ryad (Advisor) , Abd-Alghany, Nahed Abd-Elfattah (Advisor) , Zedan, Mohamed Samir Abdel-Alaziz (Advisor)
المجلد/العدد: ع189
محكمة: نعم
الدولة: مصر
التاريخ الميلادي: 2017
الشهر: يوليو
الصفحات: 1 - 19
رقم MD: 810674
نوع المحتوى: بحوث ومقالات
اللغة: الإنجليزية
قواعد المعلومات: EduSearch
مواضيع:
كلمات المؤلف المفتاحية:
Poly (3-Hydroxybutyrate) | Nanocomposites | Chitosan | Polyurethanes | Thermal Stability
رابط المحتوى:
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المستخلص: Polyurethanes (PUs) based on poly(^-hydroxybutyrate) (PHB) and polycaprolactone diols of different contents were synthesized using hexamethylene diisocyanate (HDI). Nanocomposites based on the prepared PUs and chitosan nanoparticles (CsNPs) with different contents (0.3.5 and 7 wt%) using solvent intercalation technique are also prepared. The prepared samples were studied by FTIR and H NMR, TEM, SEM, XRD and thermogravimetric analysis. Both FTIR and 'H NMR verified the structure of the prepared samples. TEM confirmed the presence of Cs in the nanoscale while SEM showed a roughness increment with increasing the CsNPs content. Both DSC and XRD showed that the crystallization of PHB was retardedwith increasing both PCL and CsNPs. Thermogravimetric analysis showed that the thermal stability was decreased with CsNPs incorporation.