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首页> 外文期刊>Materials & design >Effects of thermal treatment on the mechanical properties of poly(p-phenylene benzobisoxazole) fiber reinforced phenolic resin composite materials
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Effects of thermal treatment on the mechanical properties of poly(p-phenylene benzobisoxazole) fiber reinforced phenolic resin composite materials

机译：热处理对聚对苯撑苯并二恶唑纤维增强酚醛树脂复合材料力学性能的影响

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摘要

Thermal degradation behaviors of the poly(p-phenylene benzobisoxazole) (PBO) fiber and phenolic resin matrix were investigated. The unidirectional PBO fiber reinforced phenolic resin composite material laminates were fabricated and exposed in a muffle furnace of 300 ℃, 550 ℃, 700 ℃, and 800 ℃ for 5 min, respectively, to study the effects of thermal treatment on mechanical properties of the composites. After undergone thermal treatments at 300 ℃, 550 ℃ and 700 ℃ for 5 min, the flexural strength was reduced by 17%, 37% and 80%, respectively, the flexural modulus was decreased by 5%, 14% and 48%, respectively, and the interlaminar shear strength (ILSS) was lowered by 12%, 48% and 80%, respectively. Thermal treatment at 300 ℃, the phenolic resin began to pyrolyze and shrink resulted in the irreversible damage of the composites. After 550 ℃ thermal treatment, the phenolic resin pyrolyzed mostly but the PBO fiber had no obvious pyrolyze, the interface had sever broken. After 700 ℃ thermal treatment, the phenolic resin formed amorphous carbonaceous and PBO fiber pyrolyzed mostly so the mechanical properties dropped dramatically. At being heated at 800 ℃ for 5 min, the fiber was nearly totally pyrolyzed and and kept fibrous carbonaceous although the specimen became too brittle to stand any load thereon.
机译：研究了聚对苯撑苯并二恶唑（PBO）纤维和酚醛树脂基体的热降解行为。制备了单向PBO纤维增强酚醛树脂复合材料层压板，并分别在300℃，550℃，700℃和800℃的马弗炉中暴露了5分钟，以研究热处理对复合材料力学性能的影响。 。在300℃，550℃和700℃下进行5分钟的热处理后，弯曲强度分别降低了17％，37％和80％，弯曲模量分别降低了5％，14％和48％。 ，层间剪切强度（ILSS）分别降低了12％，48％和80％。在300℃的热处理下，酚醛树脂开始热解和收缩，导致复合材料不可逆转的破坏。 550℃热处理后，酚醛树脂大部分发生热解，而PBO纤维无明显热解，界面断裂严重。经过700℃热处理后，酚醛树脂形成无定形碳质，PBO纤维发生了热解，力学性能急剧下降。在800℃加热5分钟后，纤维几乎完全热解，并保持纤维状碳质，尽管样品变得太脆以至于无法承受任何载荷。

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  • 来源
    《Materials & design》 |2014年第2期|230-235|共6页
  • 作者

    Liping Bian; Jiayu Xiao; Jingcheng Zeng; Suli Xing; Changping Yin; Aiqing Jia;

  • 作者单位

    Department of Materials Science and Engineering, College of Aerospace Science and Engineering National University of Defense Technology, Changsha 410073, China;

    Department of Materials Science and Engineering, College of Aerospace Science and Engineering National University of Defense Technology, Changsha 410073, China;

    Department of Materials Science and Engineering, College of Aerospace Science and Engineering National University of Defense Technology, Changsha 410073, China;

    Department of Materials Science and Engineering, College of Aerospace Science and Engineering National University of Defense Technology, Changsha 410073, China;

    Department of Materials Science and Engineering, College of Aerospace Science and Engineering National University of Defense Technology, Changsha 410073, China;

    Department of Materials Science and Engineering, College of Aerospace Science and Engineering National University of Defense Technology, Changsha 410073, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Poly(p-phenylene benzobisoxazole) fiber; Phenolic resin matrix composite; Thermal degradation; Flexural properties; Interlaminar shear strength;

    机译：聚对苯撑苯并二恶唑纤维;酚醛树脂基复合材料;热降解;弯曲性能;层间剪切强度;

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