Hence, the materials will yield mor

Hence, the materials will yield more tiny cracks and particle deformation due to the tensile stress. But, when the CaCO3 content reaches a certain critical value, there is an increasing disturbance of bonding between molecular chains due to excessive proximity with the particles. This reduces the length of the rotating chain segment, leading to stress concentration followed by a decreasing tensile strength. One possible explanation for this strength reduction is that the amount of nano-sized particles increases, and the excessive proximity of the particles is likely to lead to poor fracture resistance due to the development of a large number of tiny cracks. The increase in the number of particles makes the dispersiondifficult and agglomeration easier. Since agglomerated particles generate defects on the material surface, stress concentration is likely to occur within the unsaturated polyester or agglomerated particles. It generates slippage within the material due to external force, resulting in decreased tensile strength.