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首页> 外文期刊>Applied Surface Science >Influence of DBD-grafted multi-carboxyl polyurethane on interfacial properties of PBO fibre-reinforced BMI resin composites
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Influence of DBD-grafted multi-carboxyl polyurethane on interfacial properties of PBO fibre-reinforced BMI resin composites

机译：DBD接枝多羧基聚氨酯对PBO纤维增强BMI树脂复合材料界面性能的影响

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摘要

The poor adhesion between polybenzoxazole (PBO) fibre and resin can lead to limitations in the composites formed for practical applications. Air atmospheric dielectric barrier discharge was applied to graft multi-carboxyl polyurethane (C-PU) designed and synthesised by introducing polar functional groups on the PBO fibre surface to enhance interfacial bonding. The effects of power density and C-PU concentration on the composites formed, as well as the surface ageing time of post-grafted fibres, were studied. The surface chemical composition and morphologies of the grafted PBO fibre were characterised by X-ray photoelectron spectroscopy, attenuated total reflection Fourier transformed infrared spectroscopy, and scanning electron microscopy. Mechanical performance testing showed that the interlaminar shear strength of the PBO/BMI composites is significantly improved and that the fibre surface activity can be maintained for up to 15 days. More importantly, the transition temperature of the as-prepared C-PU graft matched with the curing temperature of the BMI resin.
机译：聚苯并恶唑（PBO）纤维与树脂之间的不良粘合力可能会导致在实际应用中形成的复合材料受到限制。将大气介电阻挡放电应用于通过在PBO纤维表面上引入极性官能团以增强界面键合而设计和合成的接枝多羧基聚氨酯（C-PU）。研究了功率密度和C-PU浓度对所形成复合材料的影响以及接枝后纤维的表面老化时间。用X射线光电子能谱，衰减全反射傅里叶变换红外光谱和扫描电子显微镜对接枝的PBO纤维的表面化学组成和形貌进行了表征。力学性能测试表明，PBO / BMI复合材料的层间剪切强度得到了显着提高，并且纤维表面活性可以保持长达15天。更重要的是，所制备的C-PU接枝的转变温度与BMI树脂的固化温度相匹配。

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  • 来源
    《Applied Surface Science》 |2020年第may15期|145662.1-145662.9|共9页
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  • 作者单位

    Dalian Univ Technol Sch Chem Engn State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Shangrao Normal Univ Coll Chem & Environm Sci Shangrao 334001 Peoples R China;

    Xian Aerosp Composites Res Inst Xian 710025 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Fibres; Polymer-matrix composites (PMCs); Interface; Plasma graft;

    机译：纤维;聚合物基复合材料（PMC）;接口;等离子移植;

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