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首页> 外文期刊>Journal of Applied Polymer Science >Investigation of the Structural, Thermal, Mechanical, and Optical Properties of Poly(methyl methacrylate) and Poly(vinylidene fluoride) Blends
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Investigation of the Structural, Thermal, Mechanical, and Optical Properties of Poly(methyl methacrylate) and Poly(vinylidene fluoride) Blends

机译：聚甲基丙烯酸甲酯和聚偏二氟乙烯共混物的结构，热，机械和光学性质的研究

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摘要

In this investigation, poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) blends (w/w) were prepared in a Brabender (South Hackensack, NJ) plasticorder with a thermoplastic mixing chamber (type W60) preheated at 180 degrees C. These blends were further converted into films by a conventional solution casting method and characterized with Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, mechanical property measurements, impact strength testing, ultraviolet-visible spectroscopy, refractive-index measurements, and contact-angle study. The Fourier transform infrared results indicated that the compatibility between these two systems resulted from hydrogen bonding between the carbonyl group of PMMA and the CH2 group of PVDF. The thermal analysis showed depressions in the glass-transition temperature, melting temperature, and crystallization temperature. The heat of crystallization increased with an increase in the PVDF content in the blend. An increase in the heat of crystallization meant an increase in the crystallinity. An increase in the cooling rate increased the crystallization rate. The improvement in the mechanical properties of the blend films indicated that the observed behavior was ascribable to a more coherent structure of the blends due to strong specific interactions between PMMA and PVDF chains. The impact strength analysis revealed a substantial increase in the impact strength from 21.64 to 38.52 J/m. Optical absorption spectra suggested the presence of an optical band gap energy that increased with an increase in the PVDF content in the blend. The contact angle against water increased with the PVDF content in the blend film, and this was caused by the hydrophobicity of PVDF due to the CF2 group of PVDF.
机译：在这项研究中，聚（甲基丙烯酸甲酯）（PMMA）和聚（偏二氟乙烯）（PVDF）混合物（w / w）是在Brabender（South Hackensack，NJ）塑料订单中制备的，其中的热塑性混合室（W60型）在60 180℃。通过常规溶液流延方法将这些共混物进一步转化为膜，并通过傅里叶变换红外光谱，差示扫描量热法，X射线衍射，力学性能测量，冲击强度测试，紫外可见光谱，折射率来表征。测量和接触角研究。傅里叶变换红外结果表明，这两个系统之间的相容性是由于PMMA的羰基与PVDF的CH2之间的氢键键合引起的。热分析表明玻璃化转变温度，熔融温度和结晶温度降低。结晶热随着共混物中PVDF含量的增加而增加。结晶热的增加意味着结晶度的增加。冷却速率的增加增加了结晶速率。共混物膜的机械性能的改善表明，由于PMMA和PVDF链之间强烈的特定相互作用，观察到的行为归因于共混物更紧密的结构。冲击强度分析表明，冲击强度从21.64大大提高到38.52 J / m。光学吸收光谱表明存在光学带隙能量，该能量随着共混物中PVDF含量的增加而增加。与水的接触角随共混膜中PVDF含量的增加而增加，这是由于PVDF的CF2基团导致PVDF的疏水性所致。

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