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首页> 外文期刊>Journal of Applied Polymer Science >Novel trifluoromethyl-containing poly(amide-imide)s: Organosolubility, optical behavior, thermostability, and crystallinity
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Novel trifluoromethyl-containing poly(amide-imide)s: Organosolubility, optical behavior, thermostability, and crystallinity

机译：新型的含三氟甲基的聚酰胺酰胺：有机溶度，光学行为，热稳定性和结晶度

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摘要

A new dicarboxylic acid monomer, 2,6-bis(1,3-dioxo-5-carboxyisoindolin-2- yl)-4,4'-bis(trifluoromethyl)-1,1'-diphenyl ether (IFDPE), bearing two preformed imide rings was synthesized via a three-step manner from 4-(trifluoromethyl) phenol and 4-chloro-3,5-dinitrobenzotrifluoride. The monomer IFDPE was then used to prepare a series of novel trifluoromethyl-containing poly(amide-imide)s via a direct phosphorylation polycondensation with various aromatic diamines. The intrinsic viscosities of the polymers were found to be in the range 0.86-1.02 d/g. The weight- and number-average molecular weights of the resulting polymers were determined with gel permeation chromatography. The polymeric samples were readily soluble in a variety of organic solvents and formed low-color, flexible thin films via solution casting. The values of the absorption edge wavelength were determined by ultraviolet-visible spectroscopy, and all of the resulting poly (amide-imide)s films exhibited high optical transparency. The resulting polymers showed moderately high glass-transition temperatures in the range 295-324°C and had 10% weight loss temperatures in excess of 524°C in nitrogen. The crystallinity extents were qualitatively investigated with wide-angle X-ray diffraction measurements. Scanning electron microscopy images revealed an agglomerated bulk with nonuniformity on the surface.
机译：一种新的二羧酸单体2,6-双（1,3-二氧代-5-羧基异吲哚-2-基）-4,4'-双（三氟甲基）-1,1'-二苯醚（IFDPE），带有两个通过三步法由4-（三氟甲基）苯酚和4-氯-3,5-二硝基苯并三氟化物合成预形成的酰​​亚胺环。然后，通过与各种芳族二胺的直接磷酸化缩聚反应，将单体IFDPE用于制备一系列新型的含三氟甲基的聚（酰胺-酰亚胺）。发现聚合物的特性粘度在0.86-1.02 d / g的范围内。用凝胶渗透色谱法测定所得聚合物的重均分子量和数均分子量。聚合物样品易于溶于各种有机溶剂，并通过溶液流延形成低色柔韧性薄膜。吸收边缘波长的值通过紫外-可见光谱法确定，并且所有所得的聚（酰胺-酰亚胺）膜均显示出高的光学透明性。所得的聚合物在295-324℃的范围内显示出适度的高玻璃化转变温度，并且在氮气中具有超过524℃的10％的失重温度。用广角X射线衍射测量定性地研究结晶度。扫描电子显微镜图像显示在表面上具有不均匀性的团块。

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