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<p>The aim of this work is to find out the impact of the kinetic parameters, temperature (<i>T</i>) and time (<i>t</i>), of the self-healing process of the interface between a polymer in the glassy state and a polymer in the viscoelastic state on the statistical normal distribution parameters of the developed lap-shear strength (<i>σ</i>). For this purpose, the specimens of polystyrene (PS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) were kept in contact at several constant <i>T</i>’s located on both sides of the bulk glass transition temperature (<i>T</i><sub>g</sub><sup>b</sup>) of PS corresponding to very low <i>T</i>’s as compared to the PPO <i>T</i><sub>g</sub><sup>b</sup>, down to <i>T</i> = <i>T</i><sub>g</sub><sup>b</sup> − 126&#xa0;°C, over a broad interval of <i>t</i> of 2&#xa0;min to 96&#xa0;h. For each set of the <i>t</i>-<i>T</i> self-healing conditions, a number (<i>n</i>) of mechanically sustainable adhesive joints PS−PPO were formed and thereafter fractured at ambient <i>T</i>. The measured datasets <i>σ</i> (<i>n</i>) are analyzed using the quantile−quantile plots, probability density function histograms of <i>σ</i> and a series of the standard tests for normality. The normal probability parameter (<i>p</i>) is analyzed as a function of <i>T</i> and <i>t</i>. The applicability of the three methods used to describe the <i>σ</i> distribution at the PS−PPO interface is discussed.</p>

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On the relationship between kinetics and normal statistics of the self-healing process of a vitrified polymer − devitrified polymer interface

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • Yuri M. Boiko

摘要

The aim of this work is to find out the impact of the kinetic parameters, temperature (T) and time (t), of the self-healing process of the interface between a polymer in the glassy state and a polymer in the viscoelastic state on the statistical normal distribution parameters of the developed lap-shear strength (σ). For this purpose, the specimens of polystyrene (PS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) were kept in contact at several constant T’s located on both sides of the bulk glass transition temperature (Tgb) of PS corresponding to very low T’s as compared to the PPO Tgb, down to T = Tgb − 126 °C, over a broad interval of t of 2 min to 96 h. For each set of the t-T self-healing conditions, a number (n) of mechanically sustainable adhesive joints PS−PPO were formed and thereafter fractured at ambient T. The measured datasets σ (n) are analyzed using the quantile−quantile plots, probability density function histograms of σ and a series of the standard tests for normality. The normal probability parameter (p) is analyzed as a function of T and t. The applicability of the three methods used to describe the σ distribution at the PS−PPO interface is discussed.