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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of segmented semifluorinated poly(aryl ether)s from aromatic trifluorovinyl ethers and oligo(ethylene glycol)s
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Preparation of segmented semifluorinated poly(aryl ether)s from aromatic trifluorovinyl ethers and oligo(ethylene glycol)s

机译：由芳族三氟乙烯基醚和低聚乙二醇制备分段半氟化聚芳醚

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摘要

A series of new segmented semifluorinated polyaryl ethers (PAEs) containing a biphenyl segmented by semifluorinated oligoethylene (SFE) units were prepared by nucleophilic addition of a commercial oligo(ethylene glycol)s to 4,4'-bis(4-trifluorovinyloxy)biphenyl. These new thermoplastics were characterized by H-1 and F-19 nuclear magnetic resonance (NMR) and attenuated total reflectance Fourier transform infrared (ATR-FTIR). Gel permeation chromatography (GPC) analysis displayed number average molecular weights (M(n)s) from 9000 to 13,000. Thermal properties of the polymers were studied by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). DSC chromatograms displayed glass transition temperatures (T(g)s) from 11 to 1 degrees C. The onsets of degradations were observed by TGA analysis between 313 to 333 degrees C in air and 326 to 363 degrees C in nitrogen, respectively. A second onset of degradation was observed from 452 to 470 degrees C for all polymers. In addition, crystalline morphologies were studied by tapping mode atomic force microscopy (TM-AFM) and showed needle-like crystallites. (C) 2015 Wiley Periodicals, Inc.
机译：通过将商业化的低聚乙二醇与4,4'-双（4-三氟乙烯基氧基）联苯进行亲核加成反应，制得了一系列新的含联苯的分段式半氟化聚芳基醚（PAE），这些联苯被半氟化低聚乙烯（SFE）单元分段。这些新型热塑性塑料的特征在于H-1和F-19核磁共振（NMR）和衰减的全反射傅立叶变换红外光谱（ATR-FTIR）。凝胶渗透色谱（GPC）分析显示，数均分子量（M（n）s）为9000至13,000。通过差示扫描量热法（DSC）和热重分析（TGA）研究了聚合物的热性能。 DSC色谱图显示了11至1摄氏度的玻璃化转变温度（T（g）s）。通过TGA分析，分别在空气中313至333摄氏度和氮气中326至363摄氏度之间观察到降解的开始。对于所有聚合物，从452℃到470℃观察到第二次降解。此外，通过敲击模式原子力显微镜（TM-AFM）研究了晶体形态，并显示出针状微晶。 （C）2015年Wiley Periodicals，Inc.

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