عنوان المقالة: Poly(ester-amine) Hyperbranched Polymer as Toughening and Co-curing Agent for Epoxy/Clay Nanocomposites
د.مشيره سامى عبد العزيز يوسف | Dr.Moshera Samy Abdelaziz Youssef | 4131
- نوع النشر
- مقال علمي
- المؤلفون بالعربي
- الملخص الانجليزي
- The marriage between hardness and flexibility of epoxy resins (improved toughness) is a desired feature, which broads their application in various industrial fields, especially for high impact resistance purposes. Accordingly, this work aims to improve toughness properties of epoxy resin (Epon-828)/Ancamine (curing agent) system using amino-terminated hyperbranched poly(ester-amine) [Poly(PEODA-NPA)] (HP) as toughening and/or co-curing agent, in presence of organomodified Montmorillonite clay (OMMT) as a reinforcing filler. HP was synthesized via Michael addition reaction of poly(ethylene glycol) diacrylate (PEODA) to Nmethyl- 1,3-propanediamine (NPA). Chemical structure and molecular weight of HP were elucidated using infrared (FTIR) spectroscopy and gel permeation chromatography (GPC) techniques, respectively. Epoxy/ OMMT nanocomposites toughened with HP (at different concentrations) showed remarkable improvement in their toughness without any adverse effect on the other physico-mechanical properties. The optimum concentration of HP and OMMT was found to be 20 wt % and 1–3 wt% of the epoxy resin, respectively. The extent of exfoliation and dispersion of OMMT platelets within the epoxy cured films was assessed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements. In addition, thermal gravimetric analyses (TGA-DTA) of epoxy/OMMT nanocomposites toughened with HP showed a slight increase in their decomposition temperature, particularly at low OMMT loading.
- تاريخ النشر
- 15/07/2013
- الناشر
- POLYMER ENGINEERING AND SCIENCE
- رقم المجلد
- رقم العدد
- رابط DOI
- 10.1002/pen.23344
- الصفحات
- 10 صفحات
- رابط الملف
- تحميل (1 مرات التحميل)
- رابط خارجي
- https://onlinelibrary.wiley.com/doi/abs/10.1002/pen.23344
- الكلمات المفتاحية
- Epoxy/Clay Nanocomposites- toughness-Hyperbranched Polymer