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Spectroscopic and thermal studies of PS/PVAc blends

机译:PS / PVAc共混物的光谱和热学研究

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Polystyrene and polyvinyl acetate (PS/PVAc) films were blended with different contents using casting method. The effect of PS content on PVAc blends was investigated by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Ultra violet and visible studies (UV/VIS), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Significant changes in FT-IR, XRD and DSC analysis are observed which reveals an interactions between the two polymers and PS/PVAc blends had good or certain miscibility. XRD scans show some changes in the intensity and the height of the amorphous halos with increased PS. UV/VIS analysis revealed that the optical band gap decreases with increasing content of PS from 5 to 4.11 eV. A single glass transition temperature for each blend was observed, this DSC results supported that the miscibility existed in the blend. The apparent activation energy (E) of the blends was evaluated using TGA analysis. The value of E was increased with the increase of PS content.
机译:使用流延方法将聚苯乙烯和聚乙酸乙烯酯(PS / PVAc)薄膜以不同的含量混合。通过傅立叶变换红外(FT-IR),X射线衍射(XRD),紫外线和可见光研究(UV / VIS),差示扫描量热法(DSC)和热重分析(TGA)研究了PS含量对PVAc混合物的影响)。观察到了FT-IR,XRD和DSC分析的显着变化,揭示了两种聚合物之间的相互作用,并且PS / PVAc共混物具有良好或某些混溶性。 XRD扫描显示,随着PS的增加,非晶态光环的强度和高度发生了一些变化。 UV / VIS分析表明,随着PS含量从5增加到4.11 eV,光学带隙减小。观察到每种共混物具有单一的玻璃化转变温度,该DSC结果支持共混物中存在混溶性。使用TGA分析评估共混物的表观活化能(E)。 E值随PS含量的增加而增加。

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