Effect of viscosity and thermal properties on mechanical properties of PLA materials

Mechanical properties are regularly motivated by the physical and chemical properties of materials. Fundamentally, they are determined by molecular weight, the movement of molecular chains and the interaction between molecules. As we all known, thermal properties (the glass transition temperature, the melting and cooling temperatures) and rheological property (viscosity) are influenced by these factors as well. Therefore, there should be specific relationship between them. In this work, we employed three kinds of materials: PLA3051D, PLA3052D and PLA4032D to scrutinize the relationship between mechanical properties and thermal properties, mechanical properties with rheology property. In agreement with the results, the effect of thermal properties and viscosity on mechanical properties are exhibited to mathematical equations.