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<p>Polymer crystallization affects material microstructure and the final product quality, and the crystallization kinetics that govern this process are critical. In this study, silane coupling agent-modified silica (MS) was reactive melt blended with polylactic acid (PLA) and polyamide 11(PA11) to obtain PLA/PA11/MS blends. The non-isothermal crystallization kinetics of the PLA/PA11/MS blends were subsequently investigated using the Avrami, Jeziorny, Ozawa, and Liu–Mo methods, and the crystallization activation energies of the systems were calculated by Kissinger and Friedman models. The results showed that the MS significantly promoted PLA crystallization, accelerated the crystallization rate, and shortened the crystallization time. Crystallization activation energy calculations showed that the MS promoted an increase in the crystallization capacity of the blend and a decrease in the effective potential barrier. The relationship between crystallinity and material properties was further studied through isothermal annealing treatment. The results show that reactive compatibilization and controlled crystallization can help PLA blend materials be used in more domains.</p>

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Reactive compatibilization and inorganic nanoparticles synergistically enhanced poly(lactic acid)/polyamide 11 blends

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Xipo Zhao,
  • Fan Mo,
  • Shaoding Yin,
  • Xiaolei Yu,
  • Weiyi Zhou,
  • Shaoxian Peng

摘要

Polymer crystallization affects material microstructure and the final product quality, and the crystallization kinetics that govern this process are critical. In this study, silane coupling agent-modified silica (MS) was reactive melt blended with polylactic acid (PLA) and polyamide 11(PA11) to obtain PLA/PA11/MS blends. The non-isothermal crystallization kinetics of the PLA/PA11/MS blends were subsequently investigated using the Avrami, Jeziorny, Ozawa, and Liu–Mo methods, and the crystallization activation energies of the systems were calculated by Kissinger and Friedman models. The results showed that the MS significantly promoted PLA crystallization, accelerated the crystallization rate, and shortened the crystallization time. Crystallization activation energy calculations showed that the MS promoted an increase in the crystallization capacity of the blend and a decrease in the effective potential barrier. The relationship between crystallinity and material properties was further studied through isothermal annealing treatment. The results show that reactive compatibilization and controlled crystallization can help PLA blend materials be used in more domains.