Effect of Melt Mixing Processing conditions on the Flexural andMorphological Properties of Polypropylene Reinforced with MesoporousSilica/Hydroxyapatite Nanoparticles
محل انتشار: کنفرانس دو سالانه بین المللی مکانیک جامدات تجربی
سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 807
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شناسه ملی سند علمی:
WMECH02_067
تاریخ نمایه سازی: 21 تیر 1393
چکیده مقاله:
The polypropylene (PP) nanocomposite reinforced with the composite of mesoporous silica and hydroxyapatite (MH), were prepared by melt mixing in an internal mixer and melt extrusion in a twin screw extruder. The influence of processing parameters on the flexural performance of the nanocomposite was studied by varying the mixing temperature and rotor speed of internal mixer. Maleic anhydride grafted polypropylene (PP-g-MA) was used as compatibilizer. The nanocomposites were characterized by performing flexural testing and Scanning Electron Microscopy (SEM) analysis. It was found that PP/MH prepared by two techniques were effectively enhanced the flexural propertiesof neat PP. The enhancement of flexural strength was about 33% by melt extrusion and 17.8% by melt mixing compared with neat PP. Therefore, by incorporating MH nanoparticles in PP, we could achieve a new hybrid nanocomposite with high flexural properties. Also, the optimum temperature of 180°C and rotor speed of 100 rpm obtained and applied to the extruder to achieve higher flexural properties. A higher shear rate of the twin screw extruder and more efficient sol-gel reaction led to better dispersion and higher flexural properties. From SEM images, it was observed that nanoparticles were distributed reasonably uniformly indicating a good dispersion of nano phase in the PP matrix by using extruder.
کلیدواژه ها:
نویسندگان
A. R Albooyeh
PhD Student
S Memarian
MS Student
A Fereidoon
Professor, Department of Mechanical Engineering, Semnan University, Semnan, ۳۵۱۹۵۳۶۳, Iran,
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