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<p>This research investigates the influence of cryogenic treatment parameters on the mechanical performance of polybutylene terephthalate (PBT) and polycarbonate (PC) blends. Using Grey Relational Analysis (GRA), a multi-response optimization technique, the study explores how varying blend ratios (70/30, 50/50, and 30/70) and cryogenic soaking durations (4–24&#xa0;h at − 185&#xa0;°C) affect tensile strength, elongation, impact strength, Shore D hardness, and specific wear rate. Experimental results reveal that each blend ratio responds uniquely to cryogenic treatment, emphasizing the need for parameter-specific optimization. Notably, the 70/30 blend ratio with a 16-h soaking period demonstrated the most balanced enhancement across all properties, as indicated by the highest Grey Relational Grade (GRG). The findings provide critical insights for optimizing the processing of PBT/PC blends in applications demanding high durability, toughness, and wear resistance.</p> Graphical Abstract <p></p>

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Effect of cryogenic soaking and blend ratio on performance of PBT/PC blends: a multi-response study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月15日

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  • Prajakta Mane,
  • Ashok J. Keche,
  • Swamini Chopra

摘要

This research investigates the influence of cryogenic treatment parameters on the mechanical performance of polybutylene terephthalate (PBT) and polycarbonate (PC) blends. Using Grey Relational Analysis (GRA), a multi-response optimization technique, the study explores how varying blend ratios (70/30, 50/50, and 30/70) and cryogenic soaking durations (4–24 h at − 185 °C) affect tensile strength, elongation, impact strength, Shore D hardness, and specific wear rate. Experimental results reveal that each blend ratio responds uniquely to cryogenic treatment, emphasizing the need for parameter-specific optimization. Notably, the 70/30 blend ratio with a 16-h soaking period demonstrated the most balanced enhancement across all properties, as indicated by the highest Grey Relational Grade (GRG). The findings provide critical insights for optimizing the processing of PBT/PC blends in applications demanding high durability, toughness, and wear resistance.

Graphical Abstract