Cryogenic treatment: Processing segment to tailor the interface and improve mechanical performance of impact modified PET/PBT blends

Abstract

Cryogenic treatment of polymers is a well-known area of research these days. Many reports confirm the fact that, similar to metals, polymeric materials also undergo some structural changes that ultimately enhance mechanical properties like wear performance, tensile strength, impact strength, elongation, hardness, etc. The cryogenic treatment has proven an advantage for improving the properties of both virgin polymers and polymer micro- and nanocomposites. The present study, the first of its kind, reports the effect of cryogenic treatment on polymeric blends. An attempt is made to explore the effect of the treatment parameters, like temperature and time, on the impact modified and unmodified PET/PBT blends. Similar to the polymers and composites, the blend systems studied here reflect significant improvement by ∼50% in wear performance, ∼16–19% in tensile strength, and ∼9% in impact strength after cryogenic treatment. Thus, after extensive analysis of the material properties, structure, and thermal behavior, cryogenic treatment of PET/PBT blends, both impact-modified and unmodified, is advocated as an effective tool for tailoring the interface and improving performance.

Keywords

• Cryogenic treatment
• Polymeric blends
• PET
• PBT
• Wear performance
• Impact strength