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Synthesis and Characterization of Novel Castor Oil-Based Polyol for Potential Applications in Coatings

Journal of Renewable Materials 2019年第1期7卷 31-40页

作者： Azam Sardari Ali Asghar Sabbagh Alvani seyed reza ghaffarian Color&Polymer Research Center(CPRC) Amirkabir University of TechnologyTehran158754413Iran Department of Polymer Engineering and Color Technology Amirkabir University of TechnologyTehran158754413Iran Advanced Materials Group Iranian Color Society(ICS)***TehranIran

In this study,three sorts of polyols were successfully synthesized from castor oil using a Dean-Stark quick,eco-friendly and high-efficiency *** this purpose,castor oil was epoxidized in the presence of two types of catalysts includingγ-alumina and formic acid,named as ECOAl and ECOF,*** castor oils were then characterized by use of hydrogen nuclear magnetic resonance(H-NMR)and oxirane oxygen content *** relative percentages of conversion double bond to oxirane were obtained 96% and 74% for ECOAl and ECOF,*** opening reaction of ECOAl was performed by two types of saponified castor oil as well as castor oil in a system equipped with Dean–Stark *** synthesized polyols were characterized by attenuated total reflectance-Fourier transform infrared spectroscopy(ATR-FTIR),gel permeation chromatography(GPC),differential scanning calorimetry(DSC),viscometer and OH number *** material obtained in this research is a candidate to be intended in synthesis of polyurethane for coating applications.

关键词： Castor oil dean-Stark polyol epoxidation

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A comparison study on polymeric nanocomposite foams with various carbon nanoparticles:adjusting radiation time and effect on electrical behavior and microcellular structure

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International Journal of Smart and Nano Materials 2022年第3期13卷 504-528页

作者： Mohammad Aghvami-Panah Ao Wang Mahyar Panahi-Sarmad seyed Armin seyed Esfahani Amir Abbas Seraji Mehrnaz Shahbazi reza ghaffarian Seifollah Jamalpour Xueliang Xiao Key Laboratory of Eco-Textiles Ministry of EducationJiangnan UniversityWuxiJiangsuChina Department of Polymer Engineering AmirKabir University of TechnologyTehranIran Department of Chemical Engineering Auburn UniversityAuburnALUSA Department of Chemical Engineering Faculty of EngineeringShahid Chamran University of AhvazAhvazIran

The effect of carbon black(CB),carbon nanotube(CNT),and graphene(G)on foaming,electrical conductivity(EC),and electromagnetic interference(EMI)shielding of polystyrene(PS)foam that has been produced via microwave heating operation and supercritical carbon dioxide(CO_(2))was *** containing 1 wt%,CNT,and G reached over 90%porosity after 30 s and 3 min radiation time,respectively;however,PS/CB foam did not expand properly even after 3.5 *** addition,the expansion ratio of PS/CB and PS/G was one-sixth and one-half of PS/CNT,respectively-due to the great CNT’s ability to convert microwave radiation to *** of solid and porous nanocomposites has been increased via raising filler content;however,PS/CNT displayed the highest value at the same volume *** ascending trend could not endure during foaming,so a remarkable optimum-point has been observed for nanocomposite ***,EMI-shielding properties of solid and foam nanocomposites were discussed.

关键词： Microcellular foams Polymer-matrix composites EMI shielding carbonic particles microwave

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