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首页> 外文期刊>Polymers >Enhancement of Thermal Diffusivity in Phase-Separated Bismaleimide/Poly(ether imide) Composite Films Containing Needle-Shaped ZnO Particles
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Enhancement of Thermal Diffusivity in Phase-Separated Bismaleimide/Poly(ether imide) Composite Films Containing Needle-Shaped ZnO Particles

机译：含针状ZnO颗粒的相分离双马来酰亚胺/聚（醚酰亚胺）复合薄膜的热扩散系数提高

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Phase-separated polymer blend composite films exhibiting high thermal diffusivity were prepared by blending a soluble polyimide (BPADA-MPD) and a bismaleimide (BMI) with needle-shaped zinc oxide (n-ZnO) particles followed by high-temperature curing at 250 °C. Images recorded with a field-emission scanning electron microscope (FE-SEM) equipped with wavelength-dispersive spectroscopy (WDS) demonstrated that the spontaneously separated phases in the composite films were aligned along the out-of-plane direction, and the n-ZnO particles were selectively incorporated into the BMI phase. The out-of-plane thermal diffusivity of the composite films was significantly higher than those of the previously reported composite films at lower filler contents. Based on wide-angle X-ray diffraction (WAXD) patterns and image analysis, the enhanced thermal diffusivity was attributed to the confinement of the anisotropically shaped particles and their nearly isotropic orientation in one phase of the composite films.
机译：通过将可溶性聚酰亚胺（BPADA-MPD）和双马来酰亚胺（BMI）与针状氧化锌（n-ZnO）颗粒混合，然后在250°C高温固化，制备出具有高热扩散率的相分离的聚合物共混复合膜。 C。用配备有波长色散光谱法（WDS）的场发射扫描电子显微镜（FE-SEM）记录的图像表明，复合膜中自发分离的相沿面外方向排列，并且n-ZnO颗粒被选择性地掺入到BMI相中。在较低的填料含量下，复合膜的面外热扩散率明显高于先前报道的复合膜。基于广角X射线衍射（WAXD）模式和图像分析，增强的热扩散率归因于各向异性形状的颗粒的限制及其在复合膜的一相中几乎各向同性的取向。

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