Polylactic acid and high‐density polyethylene blend: Characterization and application in additive manufacturing,Journal of Applied Polymer Science

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Polylactic acid and high‐density polyethylene blend: Characterization and application in additive manufacturing
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-07-11 , DOI: 10.1002/app.49602
Muhammad Harris _{1,

2} , Johan Potgieter ₃ , Sudip Ray ₄ , Richard Archer ₃ , Khalid Mahmood Arif ₁

Affiliation

This research reports a novel polylactic acid (PLA) blend with high density polyethylene (HDPE) and polyethylene graft maleic anhydride (PE‐g‐MAH) to mitigate the PLA degradation issues associated with high temperatures, soil and water exposure. The blend was prepared with a melt blending process and directly printed with a custom‐built pellet printer to maintain the “as prepared” properties. Thermal stability was analyzed in terms of mechanical strength at different bed temperatures and postprinting aging for 10 days. Soil burial degradation and water absorption were investigated in terms of mechanical strength and effects on mass at three intervals (15, 30, 45 days). The proposed blend revealed high stability to all three degradation mechanisms due to the chemical grafting along with physical interlocking. Finally, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) were used to confirm the enhancement in molecular interactions, melt crystallization, onset temperatures and phase distribution, respectively.

中文翻译：

聚乳酸和高密度聚乙烯共混物：表征及在增材制造中的应用

这项研究报告了一种新型的聚乳酸（PLA）与高密度聚乙烯（HDPE）和聚乙烯接枝马来酸酐（PE-g-MAH）的共混物，以减轻与高温，土壤和水接触引起的PLA降解问题。共混物是通过熔融共混工艺制备的，并直接使用定制的颗粒印刷机进行印刷，以保持“原样”的特性。根据不同床温下的机械强度和10天的印刷后老化来分析热稳定性。在三个时间间隔（15、30、45天）内，根据机械强度及其对质量的影响，研究了土葬的退化和吸水率。提议的共混物由于化学接枝和物理互锁而对所有三种降解机理均显示出高稳定性。最后，

更新日期：2020-07-11

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