Evaluation of mechanical and thermal properties of Poly (butylene terephthalate) (PBT) composites reinforced with wollastonite

Abstract

Particulate filled polymer composites are becoming attractive because of their wide applications and low cost. Present study deals with the preparation and characterization of PBT/wollastomte composites and analyzing the effect of incorporation of varying concentration of wollastonite on the mechanical, thermal, and morphological properties of PBT thermoplastic composite for future industrial applications. In the composites wollastonite content was varied by 0-30 % by weight. Tensile strength exhibited a marginal increase whereas a dramatic increase was observed in modulus with an increase in filler content. The experimental results were also compared with theoretical predictions which revealed good level of interfacial interaction in the composites. Thermal analysis revealed an increase in percent crystallinity and also the onset crystallization temperature thereby indicating the nucleating efficiency of wollastonite. Study of the fracture surface by SEM revealed a change in the micromechanical deformation process with an increase in filler content.

Effects of poly(butylene adipate‐co‐terephthalate) and ultrafined wollastonite on the physical properties and crystallization of recycled poly(ethylene terephthalate)

“…Moreover, double melting endotherms were found at about 243.9°C ( T m1 ) and 251°C ( T m2 ) for the neat rPET and at about 233.2–241.2°C ( T m1 ) and 240–249.8°C ( T m2 ) for rPET in the rPET/PBAT blends containing 10–30 wt% PBAT. The double melting endotherms of rPET have been reported previously and can be ascribed to the melting and recrystallization phenomena that occurred during the heating scan. The lower melting peak ( T m1 ) was from the melting of less perfect crystals formed during the cooling scan, while the higher melting peak ( T m2 ) was due to the melting of reorganized crystals during the heating scan .…”

“…Deshmukh et al showed that the addition of wollastonite to poly(butylene terephthalate) resulted in a marginal increase in the tensile strength but a dramatic increase in the modulus of the composites with increasing wollastonite content. They also showed the nucleating efficiency of wollastonite in these composites . In this study, an ultrafine wollastonite of a mesh size of 2,000 (∼5 μm) was used as a filler at various loading levels in the selected rPET/PBAT blend ratios.…”

Dry sliding of composites with PBT matrix and micro glass beads on steel

“…This led to a better dispersion of the MGB into the PBT matrix. This type of hard material was introduced in a polymeric matrix for more than two decades, but in softer polymers like polytetrafluoroethylene (PTFE, Shore hardness 50.56) (Arencon et al, 2007;Deshmukh et al, 2011;Suresha et al, 2010). One may notice that the dispersion interval is at the boundary between nano-and micro-sized particles (here the smallest ones have hundreds of nanometers; the biggest are rare and have 30 [.…”

“…The tribological applications of the polymeric composites require laboratory tests before designing the actual applications because the processes developed in the tribological layers are difficult to be simulated, are interconnected and could have a tremendous influence on tribological parameters as wear and friction (Burris and Sawyer, 2006;Cho et al, 2006;Deleanu et al, 2011;Iglesias et al, 2007;Klaas et al, 2005). However, few data are reported in the scientific literature on the use of fillers in the polyester-based composites (Arencon et al, 2007;Deshmukh et al, 2011;Fung and Kang, 2005;Hashemi, 2011).…”

“…Research on the tribology of polybutylene terephthalate (PBT) on steel is still at the beginning because this type of thermoplastic polyester and its composites require a more careful technological regime of molding, a thermal treatment that influences its properties (Deshmukh et al, 2011;Hashemi, 2011), but they will be in the specialists' attention due to the tendency of making the systems smaller, with better performance (including speed, load and durability).…”