Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Investigating Thermal Behavior and Dynamic-Mechanical Properties of Poly(Lactic Acid)/Poly(Caprolactone) Alloy in the Presence of KIT-6 Mesoporous Nanoparticles

Document Type : Research Article

Authors
Masoud Faal 1
Amirabbas Nejatbakhsh 2
Dariush Fallah 1
Ali Akbar Zarei Yazd 1
1 Academic Complex of Chemistry and Chemical Engineering, Malik Ashtar University of Technology, Tehran, I.R. IRAN
2 Mahshahr Faculty, Amir Kabir University of Technology, Tehran, I.R. IRAN
Abstract
In recent years, many efforts have been made to increase the strength and toughness of biodegradable polylactic acid polymer. In this research, the effect of polycaprolactone (PCL) and porous silicate particles KIT-6 on compatibility and engineering properties of polylactic acid alloy was investigated to improve the toughness of polylactic acid. For this purpose, samples of PLA/PCL alloys as well as PLA/PCL/KIT-6 nanocomposites were prepared by solution method. Their structure, morphology, thermal stability and dynamic-mechanical behavior were studied by FT-IR, DMA, OM, EDX and TGA methods. The morphological examination obtained from the light microscope images related to the surface of the samples shows that with the increase in the amount of PCL, the morphology of the samples changes from the droplet-matrix state to two continuous phases, and the addition of KIT-6 particles causes the droplets to break and significantly reduce the size of the phase droplets. scattered in the system. The results obtained from TGA tests and dynamic-mechanical properties showed that the addition of PCL can increase the thermal stability as well as increase the toughness and loss in the maximum Tan(δ) curve of nanocomposites. By adding PCL to the 85/15 sample, the degradation onset temperature for the alloy increased to 8℃ higher than that of pure PLA. For the 70/30 and 50/50 samples, 13 ℃ and 16 ℃, respectively, increased the temperature of the beginning of degradation. Also, with the addition of KIT-6, thermal stability and loss reduction in the maximum Tan(δ) curve of nanocomposites increased
Keywords
Toughness
Polycaprolactone
Polylactic acid
KIT-6
Thermal properties

Subjects

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