Glass transition temperature and thermal stability of ZnS/PMMA nanocomposites |
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| Authors: | Sonalika Agrawal Dinesh Patidar |
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| Institution: | 1. Semi-conductor and Polymer Science Laboratory, University of Rajasthan , 5-6 Vigyan Bhawan, Jaipur-302055, Rajasthan, India sonalika.spsl@gmail.com;3. Semi-conductor and Polymer Science Laboratory, University of Rajasthan , 5-6 Vigyan Bhawan, Jaipur-302055, Rajasthan, India |
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| Abstract: | In this article, ZnS nanoparticles were prepared by wet chemical precipitation method using zinc sulphate (ZnSO4), sodium sulphide (Na2S) and thio-glycerol. These nanoparticles were characterized through X-ray diffraction (XRD) and transmission electron microscope (TEM) measurements. The solution-based processing was used to prepare Poly methyl methacrylate (PMMA) nanocomposites with different weight percents (0, 2, 4, 6 and 8) of ZnS nanoparticles. The obtained ZnS/PMMA nanocomposites were characterized through XRD, scanning electron microscope and TEM measurements. The dynamic mechanical analyzer was used to obtain the storage modulus and glass transition temperature (T g) of the nanocomposites. The apparent activation energy of the glass transition region was also determined using the Vogel–Fulcher–Tammann equation. The results indicated that the thermal stability of ZnS/PMMA nanocomposites was higher than PMMA and 6 wt. % of ZnS nanoparticles in PMMA matrix showed the maximum activation energy, which indicated that this nanocomposite had higher thermal stability than other composites. |
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| Keywords: | polymer nanocomposites glass transition temperature activation energy thermal stability |
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