Abstract
In the present study, the effects of magnesia particles on thermal, dynamic mechanical, morphological, and surface properties of polystyrene resin are investigated. In general, the addition of magnesia particles in polystyrene matrix increases the thermal stability, storage modulus, and wettability, on other hand does not affect the molecular mobility. SEM results showed a limited distribution of magnesia particles in the polystyrene matrix at 15 wt.%.
Highlights
Thermoplastic polymers are largely used due to their attractive advantages such as recyclability, low process temperature, and low cost.[1]
Both pure polystyrene and its magnesia filled composites was the subject of differential scanning calorimetric analysis to investigate polystyrene molecular mobility variations after magnesia incorporation
It can be seen that addition of magnesia particles enhanced the storage modulus of the studied composites in the temperature range from 40 to 85 °C, as an example the storage modulus at 60 °C of neat polystyrene increased by 17 % with the addition of 15 wt.% of magnesia
Summary
Thermoplastic polymers are largely used due to their attractive advantages such as recyclability, low process temperature, and low cost.[1]. Thermoplastic polymers filled with metal oxides are widely used in sensors,[11] gas membranes,[12] electronic devices,[13] optoelectronics, and organic photovoltaic.[14] Magnesia (MgO) is an interesting metal oxide characterized by excellent thermodynamic stability, low dielectric constant, low refractive index, and very large band gap This metal oxide is largely used in catalysis, refractory, ceramic industry, and toxic waste treatment.[15] Magnesia can be elaborated using different methods such as a combustion process,[16] chemical vapour deposition technique,[17] and ultrasound assisted one pot method.[18]. The present contribution aims to study the feasibility of magnesia incorporation in the improvement of polystyrene resin properties Both neat polystyrene and magnesia filled polystyrene composite films prepared by melt-compounding using a single screw extruder have been tested by several techniques to investigate the effects of magnesia on thermal, morphological, dynamic mechanical properties, and wettability of polystyrene matrix. Samples of 5–6 mg were heated from 30 to 580 °C under air atmosphere at heating rate of 10 °C/min
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