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首页> 外文期刊>Journal of Applied Polymer Science >Processable and colorless fluorinated poly(ether imide)s based on an isopropylidene-containing bis(ether anhydride) and various aromatic bis(ether amine)s bearing trifluoromethyl groups
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Processable and colorless fluorinated poly(ether imide)s based on an isopropylidene-containing bis(ether anhydride) and various aromatic bis(ether amine)s bearing trifluoromethyl groups

机译：基于含异亚丙基双（醚酐）和各种带有三氟甲基的芳香族双（醚胺）的可加工的无色氟化聚醚酰亚胺

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A series of novel organosoluble and light-colored fluorinated poly(ether imide)s (PEIs) (IV) having inherent viscosities of 0.43-0.59 dL/g were prepared from 4,4'-[1,4-phenylenbis(isopropylidene-1,4-phenyleneoxy)]diphthalic anhydride (1) and various trifluoromethyl-substituted aromatic bis(ether amine)s by a standard two-step process with thermal and chemical imidization of poly (amic acid) precursors. These PEIs showed excellent solubility in many organic solvents and could be solution-cast into transparent and tough films. These films were essentially colorless, with an UV-visible absorption edge of 361375 nm and a very low b* value (a yellowness index) of 15.3-17.0. They also showed good thermal stability with glass-transition temperature of 191-248 degrees C, 10% weight loss temperature in excess of 494 degrees C, and char yields at 800 degrees C in nitrogen more than 39%. The thermally cured PEI films showed good mechanical properties with tensile strengths of 83-96 MPa, elongations at break of 8-11%, and initial moduli of 1.7-2.0 GPa. They possessed lower dielectric constants of 3.25-3.72 (1 MHz). In comparison with the V series nonfluorinated PEIs, the IV series showed better solubility, lower color intensity, and lower dielectric constants. (c) 2007 Wiley Periodicals, Inc.
机译：由4,4'-[1,4-苯撑二（异亚丙基-1）制备一系列具有0.43-0.59 dL / g固有粘度的新型有机可溶性和浅色氟化聚醚酰亚胺（IV） ，（4-苯氧基）]二邻苯二甲酸酐（1）和各种三氟甲基取代的芳族双（醚胺）通过标准的两步法，对聚（酰胺酸）前体进行热和化学酰亚胺化。这些PEI在许多有机溶剂中显示出极好的溶解性，可以溶液浇铸成透明而坚韧的薄膜。这些薄膜基本上是无色的，其紫外可见吸收边缘为361375 nm，b *值（黄度指数）非常低，为15.3-17.0。它们还显示出良好的热稳定性，玻璃化转变温度为191-248摄氏度，失重温度超过494摄氏度的10％，并且在800摄氏度的氮气中焦炭收率超过39％。热固化的PEI膜表现出良好的机械性能，拉伸强度为83-96 MPa，断裂伸长率为8-11％，初始模量为1.7-2.0 GPa。它们具有较低的介电常数3.25-3.72（1 MHz）。与V系列非氟化PEI相比，IV系列显示出更好的溶解度，更低的色彩强度和更低的介电常数。 （c）2007年Wiley Periodicals，Inc.

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