Mechanical and thermal properties of unsaturated polyester/calcium carbonate nanocomposites

Abstract

In this study, the nano-sized calcium carbonate (CaCO 3 ) is synthesized using an in situ deposition technique and characterized using TEM. The particle size is found to be around 50-60 nm. Nanocomposites of UPR and nano-CaCO 3 particles are prepared by casting technique. The TEM study demonstrates that nano-CaCO 3 particles are dispersed in a UPR matrix uniformly and few agglomerations are found at and above 5 wt% of nano-CaCO 3 in the UPR matrix. XRD studies reveal the formation of nanocomposites. The mechanical and thermal properties of UPR/CaCO 3 nanocomposites are better than those of pure UPR. Up to 5 wt% loading of nano-CaCO 3 in the UPR matrix, the tensile, flexural, and impact strengths slightly improved. The flexural modulus increases with increase in nano-CaCO 3 concentration. The morphology of the impact fracture surface of nanocomposites is analyzed by means of SEM. The dynamic mechanical analysis of the nanocomposites clearly indicates a progressive increase in T g with the progressive addition of nano-CaCO 3 till a loading of 5 wt% of nano-CaCO 3 in the unsaturated polyester resin.

Effect of Alumina Contents on the Physicomechanical Properties of Alumina (Al2O3) Reinforced Polyester Composites

“…In order to improve those drawbacks, many attempts have been carried out, such as by incorporating fibers [11,12] and fillers [13,14] into the polymeric matrix. It has been reported that the addition of ceramic particles into polymer matrix has successfully enhanced the strength and hardness of the polymeric composites at room and elevated temperatures [1].…”

Morphology development and mechanical properties of unsaturated polyester resin containing nanodiamonds

“…The role of nanoparticles with various shapes and properties like CNTs, GO, clay, carbon black, nanoalumina, nano calcium carbonate and nano titanium on the performance of UP resins has been investigated. In all cases the optimum improvement in mechanical properties can be achieved by a fine dispersion of nanoparticles providing the maximum interfacial area.…”

Thermal Degradation Kinetics of ZnO/polyester Nanocomposites

“…Furthermore, the heat treatment produced an effective size reduction of the ZnO particles promoting an increase of the surface area. Hence, as the surface area/volume ratio increased with the decrease in the size of the nanoparticle, this might lead to the low stiffening effect [ 3 , 32 , 33 ].…”

“…They are considered as heterogeneous catalysts and applied for acid–base and redox reactions. Furthermore, metal oxide nanoparticles are widely used in various reactions, which include oxidation, dehydration, dehydrogenation and isomerization, reasons they are versatile materials that can be used in applications such as medical technology, energy, water treatment and personal care products among others [ 1 , 3 , 4 ].…”