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首页> 外文期刊>Journal of Applied Polymer Science >Polyimides 6: Synthesis, characterization, and comparison of properties of novel fluorinated poly(ether imides)
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Polyimides 6: Synthesis, characterization, and comparison of properties of novel fluorinated poly(ether imides)

机译:聚酰亚胺6:新型氟化聚醚酰亚胺的合成,表征和性能比较

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Five new poly(ether Brides) have been prepared on reaction with oxydiphthalic anhydride (ODA) with five different diamines: 1,4-bis(p-aminophenoxy-2'-trifluoromethyl benzyl) benzene, 4,4'-bis(p-aminophenoxy-2'-trifluoromethyl benzyl) benzene, 1,3-bis(p-aminophenoxy-2'-trifluoromethyl benzyl) benzene, 2,6-bis(p-aminophenoxy-2'-trifluoromethyl benzyl) pyridine, and 2,5-bis(p-aminophenoxy-2'-trifluoromethyl benzyl) thiophene. Synthesized polymers showed good solubility in different organic solvents. The polyimide films have low water absorption of 0.3-0.7%, low dielectric constants of 2.82-3.19 at 1 MHz, and high optical transparency at 500 nm (>73%). These polyimides showed very high thermal stability with decomposition temperatures (5% weight loss) up to 531 degreesC in air and good isothermal stability; only 0.4% weight loss occurred at 315 degreesC after 5 h. Transparent thin filers of these polyimides exhibited tensile strength up to 147 MPa, a modulus of elasticity up to 2.51 GPa and elongation at break up to 30% depending upon the repeating unit structure. (C) 2004 Wiley Periodicals, Inc.
机译:与氧二邻苯二甲酸酐(ODA)与五种不同的二胺反应制得了五种新的聚醚新娘:1,4-双(对氨基苯氧基-2'-三氟甲基苄基)苯,4,4'-双(p-氨基苯氧基-2'-三氟甲基苄基)苯,1,3-双(对氨基苯氧基-2'-三氟甲基苄基)苯,2,6-双(对氨基苯氧基-2'-三氟甲基苄基)吡啶和2,5 -双(对氨基苯氧基-2'-三氟甲基苄基)噻吩。合成的聚合物在不同的有机溶剂中显示出良好的溶解性。聚酰亚胺膜的吸水率低至0.3-0.7%,在1 MHz时介电常数低,在2.82-3.19,在500 nm(> 73%)时具有高的光学透明性。这些聚酰亚胺表现出很高的热稳定性,在空气中的分解温度高达531摄氏度(5%失重),并且具有良好的等温稳定性。 5小时后在315摄氏度时只有0.4%的重量减轻。这些聚酰亚胺的透明薄锉片根据重复单元结构的不同,其抗拉强度最高为147 MPa,弹性模量最高为2.51 GPa,断裂伸长率最高为30%。 (C)2004年Wiley Periodicals,Inc.

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