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PAEK/BMI共混体系分相机理及其层状体系相形态的初步研究 被引量:3

Preliminary Study on Phase Separation Mechanism of PAEK/BMI Blends and Laminated System with Morphology
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摘要 采用原子力显微镜研究了PAEK/双马来酰亚胺共混体系的分相机理和层状体系固化后的相形态结构。通过AFM可以清楚地观察到,PAEK含量较低时,分相机理是成核-增长机理(Nuc leation and G rowth m echan ism,简称NG),形成典型的海岛分相结构;随着PAEK含量的增加,分相机理变成旋节线相分离机理(Sp inodal Decomposition,简称SD),形成了典型的双连续结构,随着PAEK的含量进一步增大,形成典型的相反转结构,SEM观察证实了AFM观察的相分离机理。同时共混物的冲击强度在PAEK含量为20phr时出现了一个峰值,此时共混体系的冲击强度提高了近2倍。通过SEM研究PAEK/双马来酰亚胺层状体系,发现PAEK膜与BM I相互接触的区域,由于相互扩散出现了类似共混体系的相形态结构,其中由于BM I的扩散能力较PAEK较强,发现在PAEK相出现大量BM I颗粒,这种结构对于提高双马来酰亚胺树脂的韧性非常有利,通过研究PAEK/双马来酰亚胺共混体系的分相机理及其层状结构的相形态结构,从而为PAEK膜"离位"增韧BM I树脂基复合材料打下基础。 The phase separation mechanism of PAEK/BMI blend was studied by AFM and phase morphology structnre of the PAEK/BMI laminated system was also investigated.The AFM images clearly showed the phase separation mechanism of PAEK/BMI blend,with low content of PAEK,the phase separation progresses according to the Nucleation and Growth mechanism,which leads to the typical phase morphology-sea-island structure.With the content of PAEK increasing,the Spinodal Decomposition mechanism happens and the typical co-continuo...
出处 《航空材料学报》 EI CAS CSCD 2006年第3期177-182,共6页 Journal of Aeronautical Materials
基金 国家973项目(2003CB615604)
关键词 双马来酰亚胺树脂 PAEK 分相机理 AFM相形态结构 BMI PAEK phase separation AFM phase morphology structnre
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参考文献12

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