用于制备高填充木塑复合材料的聚丙烯和马来酸化聚丙烯的模拟回收,ACS Applied Polymer Materials

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用于制备高填充木塑复合材料的聚丙烯和马来酸化聚丙烯的模拟回收
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2022-03-11 , DOI: 10.1021/acsapm.1c01671
Dylan Jubinville ₁ , Costas Tzoganakis ₁ , Tizazu H. Mekonnen ₁

Affiliation

在这项研究中，聚丙烯 [PP] 和马来酸酐接枝聚丙烯 [MAPP] 被再加工 1 到 3 次以模拟回收。将 30 wt% 的再加工 PP 和 MAPP 与 70 wt% 的木材填料复合以制造高填充木塑复合材料 [WPC]。使用分批混合器和注塑机生产整齐的复合样品。使用光散射、核磁共振、流变学、显微镜和其他物理/机械特性分析了 PP 的回收和马来化的影响。虽然热机械加工可能导致断链反应，表现为熔体粘度和重均分子量降低，但观察到的变化很小，并没有显着改变整体性能。重复的再加工允许掺入高达 70 wt% 的木粉 [WF] 以制造高度填充的 WPC，而马来酸化允许更好的相互作用和复合材料的强度。总体而言，具有马来酸酐的 WPC 表现出吸引人的物理性能，因为它们具有更高的拉伸性能和缺乏氧化或显着降解水平。这表明，再加工 PP 的马来化可能是减少原始和石油基 MAPP 同时恢复 WPC 机械性能的重要且有效的策略。具有马来酸酐的 WPC 表现出吸引人的物理性能，因为它们具有更高的拉伸性能，并且没有氧化或显着降解。这表明，再加工 PP 的马来化可能是减少原始和石油基 MAPP 同时恢复 WPC 机械性能的重要且有效的策略。具有马来酸酐的 WPC 表现出吸引人的物理性能，因为它们具有更高的拉伸性能，并且没有氧化或显着降解。这表明，再加工 PP 的马来化可能是减少原始和石油基 MAPP 同时恢复 WPC 机械性能的重要且有效的策略。

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Simulated Recycling of Polypropylene and Maleated Polypropylene for the Fabrication of Highly-Filled Wood Plastic Composites

In this study, polypropylene [PP] and maleic anhydride grafted polypropylene [MAPP] were reprocessed from one to three times to simulate recycling. 30 wt % of the reprocessed PP and MAPP were compounded with 70 wt % wood filler to fabricate highly filled wood plastic composites [WPCs]. The neat and composite samples were produced using a batch mixer and injection molder. The effect of recycling and maleation of PP was analyzed using light scattering, nuclear magnetic resonance, rheology, microscopy, and other physical/mechanical properties. While thermomechanical processing may lead to chain scission reactions, shown by a reduction in melt viscosity and weight-average molecular weight, the observed changes are minor and did not change the bulk properties significantly. The repeated reprocessing allowed for the incorporation of up to 70 wt % wood flour [WF] to fabricate the highly filled WPC while the maleation allowed for better interactions and the composite’s strength. Overall, the WPCs with maleic anhydride displayed appealing physical properties due to their increased tensile properties and a lack of oxidation or significant level of degradation. This indicates that the maleation of reprocessed PP could be an important and effective strategy to reduce virgin and petroleum-based MAPP while revitalizing mechanical properties for WPCs.

更新日期：2022-03-11

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