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首页> 外文期刊>RSC Advances >Novel super-toughened bio-based blend from polycarbonate and poly(lactic acid) for durable applications
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Novel super-toughened bio-based blend from polycarbonate and poly(lactic acid) for durable applications

机译：来自聚碳酸酯和聚（乳酸）的新型超强的生物基混合物，用于耐用应用

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摘要

High-performance bio-based polycarbonate (PC) and poly(lactic acid) (PLA) blends are created using poly(ethylene-n-butylene-acrylate-co-glycidyl methacrylate) (EBA-GMA) as a reactive compatibilizer and impact modifier, with the aid of an epoxy-based chain extender (CE). It is found that the use of a specific acrylic impact modifier and a high blending temperature are the major factors in reaching high toughness and superior heat resistance. Toughened blends containing 32 wt% of biosourced PLA showed impact strength and heat resistance comparable to that of neat PC, while exceeding the mechanical properties of PC. Atomic force microscopy (AFM) studies have shown that an EBA-GMA phase was concentrated exclusively within a brittle PLA phase, ensuring high-efficiency impact-strength modification with a relatively small amount of modifier. As little as 6 wt% of EBA-GMA in a PC/PLA blend was enough to increase the toughness by more than 10 times. It is found that PLA and PC phases form a co-continuous morphology in the blend, allowing it to reach a high heat resistance that is almost unaffected by an impact modifier content of up to 10 wt%. It is shown that targeted toughening of the brittle PLA phase allows the achievement of excellent mechanical properties due to a lower required acrylic rubber content. A significant bio-based content in the PC/PLA blend allows increased sustainability of manufacturing and opens possibilities for use in a wide range of industrial applications.
机译：使用聚（乙烯 - 丁二烯 - 丙烯酸酯 - 甲基丙烯酸缩水甘油酯）（EBA-GMA）为反应性增容剂和抗冲改性剂，产生高性能生物基聚碳酸酯（PC）和聚（乳酸）（PLA）共混物，借助于环氧基的链增量剂（CE）。发现使用特定的丙烯酸抗冲改性剂和高共混温度是达到高韧性和优异耐热性的主要因素。含有32wt％的BioSelced PLA的增韧混合物显示出与整齐PC的冲击强度和耐热性相当，同时超过PC的机械性能。原子力显微镜（AFM）研究表明，EBA-GMA相仅在脆性PLA相中浓缩，确保具有相对少量的改性剂的高效冲击强度改性。在PC / PLA混合物中只有6wt％的EBA-GMA足以使韧性增加10倍以上。发现PLA和PC相形成混合物中的共同形态，使其达到高耐热性，几乎不受抗冲改性剂含量高达10wt％的影响。结果表明，由于所需的丙烯酸橡胶含量较低，脆性PLA阶段的靶向增韧允许实现优异的机械性能。 PC / PLA混合物中的大量生物基含量允许增加制造的可持续性，并打开在各种工业应用中使用的可能性。

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  • 来源
    《RSC Advances》 |2016年第107期|共11页
  • 作者

    Yuryev Yury; Mohanty Amar K.; Misra Manjusri;

  • 作者单位

    Univ Guelph Bioprod Discovery &

    Dev Ctr Dept Plant Agr Crop Sci Bldg Guelph ON N1G 2W1 Canada;

    Univ Guelph Sch Engn Guelph ON N1G 2W1 Canada;

    Univ Guelph Sch Engn Guelph ON N1G 2W1 Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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