Effect of mold temperature on short and long-term mechanical properties of PBT

• Format: Article
• Language: English
• Published: Budapest University of Technology 2008-02-01
• Series: eXPRESS Polymer Letters
• Subjects: Mechanical properties; mold temperature; polybutylene terepthalate; semicrystalline; molecular packing
• Online Access: http://www.expresspolymlett.com/letolt.php?file=EPL-0000474&mi=cd

In this work, the effect of mold temperature variation on the short-term mechanical properties obtained from the tensile and Charpy impact tests, and the long-term mechanical properties obtained from dynamic mechanical loading and flexural creep of injection molded polybutylene terepthalate (PBT) are reported. It has been observed that the effect of changing the processing condition viz. mold temperature on the viscoelastic properties are more pronounced when their long-term behavior is tested. The tensile and impact properties showed only a negligible effect to the change in mold temperature. Further, analysis of the creep curves by applying a four-element Burger model presented a comprehensive understanding of their long-term viscoelastic behavior with respect to the change in mold temperature.