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Synthesis and characterization of some copoly (ether / esterurethane) s \ chitin whiskers composites / Hend Ezzat Salama Hamd ; Supervised Magdy Sabaa Wadid Farag Sabaa , Gamal Riad Saad , Nadia Ahmed Mohamed

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Hend Ezzat Salama Hamd , 2014Description: 110 P. : facsimiles ; 25cmOther title:
  • تحضير و توصيف بعض متراكبات البوليمرات المشتركة من البولى إيثر- إستر يوريثانات مع شعيرات الكيتين [Added title page title]
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  • Issued also as CD
Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry Summary: High molecular weight polyurethanes have been prepared by a one chain extension reaction performed on P [(R) - HB] - diol, as hard segments, and P [(R,S) - HB] - diol, as well as PCL {u2013}PEG - PCL - diol, as soft segments, and Ü- Chitin whiskers (ChWs) as reinforcing nanofiller, using 1,6 - hexamethylene diisocyanate, as non - toxic connecting agent, series A and B, respectively. The molecular characterization by FTIR and 1H - NMR spectroscopy, the molecular weight and molecular weight distribution by GPC and the main thermal properties by DSC and TG of all synthesized materials are reported. The thermal properties and non - isothermal crystallization behavior of PU sample containing 40 wt.% P [(R) - HB] with and without Ü- Chitin whiskers were studied using TG and DSC, and their kinetics data were investigated via the avrami, Ozawa, and Z. S. Mo methods, respectively. Crystallization activation energy was estimated using kissinger{u2019}s method
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Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.10.M.Sc.2014.He.S (Browse shelf(Opens below)) Not for loan 01010110064305000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.10.M.Sc.2014.He.S (Browse shelf(Opens below)) 64305.CD Not for loan 01020110064305000

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

High molecular weight polyurethanes have been prepared by a one chain extension reaction performed on P [(R) - HB] - diol, as hard segments, and P [(R,S) - HB] - diol, as well as PCL {u2013}PEG - PCL - diol, as soft segments, and Ü- Chitin whiskers (ChWs) as reinforcing nanofiller, using 1,6 - hexamethylene diisocyanate, as non - toxic connecting agent, series A and B, respectively. The molecular characterization by FTIR and 1H - NMR spectroscopy, the molecular weight and molecular weight distribution by GPC and the main thermal properties by DSC and TG of all synthesized materials are reported. The thermal properties and non - isothermal crystallization behavior of PU sample containing 40 wt.% P [(R) - HB] with and without Ü- Chitin whiskers were studied using TG and DSC, and their kinetics data were investigated via the avrami, Ozawa, and Z. S. Mo methods, respectively. Crystallization activation energy was estimated using kissinger{u2019}s method

Issued also as CD

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