چكيده به لاتين
Poly (vinyl chloride) has a special status as one of the most widely used thermoplastics in the industry. Synthetic leather is one of the most important industries related to PVC. This thesis aims to improve the mechanical properties of synthetic leather and eliminate delamination by using organic and mineral fillers. It also examines the effect of various additives, such as lubricants, and organic and inorganic pigments, on PVC resin and the use of a novel methodology for achieving the preferred properties in synthetic leather. Due to the research gap in this field, the dissertation has been conducted experimentally and applied in the industry. Suspension powder was added to the E-PVC plastisol to improve its mechanical properties and prevent delamination. As a result, using 6 Phr of S-PVC powder significantly improved delamination and increased both the elastic modulus and ultimate tensile strength by 15% and 5%, respectively. According to the study, different percentages of nano-silica particles were added to PVC plastisol. Additionally, the addition of 0.5 Phr nano-silica led to an increase in the mechanical properties of plasticized PVC, up to 10%. Organic and inorganic pigments are widely used in the PVC industry. This study compared the effects of an azo-based organic pigment with lead chromate as an inorganic pigment. According to the results, the ultimate tensile strength increases by up to 9% in organic pigment and 5% in inorganic pigment. In addition, the optimal amount of organic and inorganic pigments in this research is equal to 1 Phr and 1.5 Phr, respectively. In the last section of the study, the lay-up method was used to reinforce the mechanical properties of PVC composite. The use of S-PVC and PU layers in solution form between plasticized PVC layers significantly increased the mechanical properties of PVC composite.
