Study of Non-Isothermal Crystallization Kinetics of Biodegradable Poly(ethylene adipate)/SiO2 Nanocomposites

Poly(ethylene adipate) و نانوكامپوزيت poly(ethylene adipate)/silica شامل 3 درصد وزني SiO2 بوسيله روش درجا تهيه شدند. انجام آزمون برروي رفتار سنتيك بلورينگي غير همدما توسط كالري متري روبشي تفاضلي (DSC) صورت گرفت. نتايج نشان داد كه حضور نانوذرات سيليكا به دليل اثر هسته زايي ناهمگن اين ذرات بر روي ماتريكس پليمري، باعث افزايش سرعت فرآيند بلورينگي مي شود. بر طبق نتايج به دست آمده، تركيب روابط Avrami و Ozawa مدل بهتري را براي آزمودن اين سيستم به دست مي دهد.

Poly(ethylene adipte) and poly(ethylene adipate)/silica nanocomposite (PEAd/SiO2) containing 3 wt. % SiO2 were prepared by an in situ method. The examinations on the non- isothermal crystallization kinetic behavior have been conducted by means of differential scanning calorimeter (DSC). The Avrami, Ozawa, and combined Avrami and Ozawa equations were applied to describe the crystallization kinetics and to determine the crystallization parameters of the prepared PEAd/SiO2 nanocomposites. It is found that the inclusion of the silica nanoparticles can accelerate the nucleation rate due to heterogeneous nucleation effect of silica on the polymer matrix. According to the obtained results, the combined Avrami and Ozawa equation shown that the better model for examination of this system.