Multivariate Modeling of Mechanical Properties for Hot Runner Molded Bioplastics and a Recycled Polypropylene Blend

Four sustainable materials including a recycled polypropylene blend, polybutylene adipate terephthalate, and two grades of polylactic acid are compared to reference isotactic polypropylene. Tensile specimens were produced using two-cavity, hot runner mold with fully automatic cycles per standard industrial practices investigate the effect melt temperature, injection velocity, cycle time, screw speed on mechanical properties. Multiple regression principal component analyses performed for each materials. Results indicated that all readily processed runner, properties exhibited minimal variation. To extent losses in observed, results correlated thermal degradation as independently characterized by gravimetric analysis. Such can be minimized reducing temperature leading reduction environmental impact molding processes.