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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis, characterization, and comparison of properties of novel fluorinated poly(imide siloxane) copolymers
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Synthesis, characterization, and comparison of properties of novel fluorinated poly(imide siloxane) copolymers

机译：新型氟化聚（酰亚胺硅氧烷）共聚物的合成，表征和性能比较

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Four new poly(imide siloxane) copolymers were prepared by a one-pot solution imidization method at a reaction temperature of 180 degrees C in ortho-dichlorobenzene as a solvent. The polymers were made through the reaction of 0-diphthaleic anhydride with four different diamines-4,4'bis(p-aminophenoxy-3,3"-trifluoromethyl) terphenyl, 4,4'bis(3"-trifluoromethyl-p-aminobiphenyl ether)biphenyl, 2,6-bis(3'-trifluoromethyl-p-aminobiphenyl ether)pyridine, and 2,5-bis(3'-trifluoromethyl-p-aminobiphenylether)thiopene- and aminopropyl-terminated poly- dimethylsiloxane as a comonomer. The polymers were named 1a, 1b, 1c, and 1d, respectively. The synthesized polymers showed good solubility in different organic solvents. The resulting polymers were well characterized with gel permeation chromatography, IR, and NMR techniques. H-1-NMR indicated that the siloxane loading was about 36%, although 40 wt % was attempted. Si-29-NMR confirmed that the low siloxane incorporation was due to a disproportionation reaction of the siloxane chain that resulted in a lowering of the siloxane block length. The films of these polymers showed low water absorption of 0.02% and a low dielectric constant of 2.38 at 1 MHz. These polyimides showed good thermal stability with decomposition temperatures (5% weight loss) up to 460 degrees C in nitrogen. Transparent, thin films of these poly (imide siloxane)s exhibited tensile strengths up to 30 MPa and elongations at break up to 103%, which depended on the structure of the repeating unit. The rheological properties showed ease of processability for these polymers with no change in the melt viscosity with the temperature. (c) 2007 Wiley Periodicals, Inc.
机译：在180℃的反应温度下，以邻二氯苯为溶剂，通过一锅溶液酰亚胺化法制备了四种新的聚（酰亚胺硅氧烷）共聚物。该聚合物是通过0-邻苯二甲酸酐与四种不同的二胺4,4'双（对氨基苯氧基-3,3“-三氟甲基）三联苯，4,4'双（3”-三氟甲基-对氨基联苯的反应制得的醚）联苯，2,6-双（3'-三氟甲基-对氨基联苯醚）吡啶和2,5-双（3'-三氟甲基-对氨基联苯醚）噻吩和氨丙基封端的聚二甲基硅氧烷作为共聚单体。将该聚合物分别命名为1a，1b，1c和1d。合成的聚合物在不同的有机溶剂中显示出良好的溶解性。用凝胶渗透色谱法，IR和NMR技术很好地表征了所得的聚合物。 H-1-NMR表明，尽管尝试了40wt％，但是硅氧烷负载量为约36％。 Si-29-NMR证实低的硅氧烷掺入归因于硅氧烷链的歧化反应，这导致硅氧烷嵌段长度的降低。这些聚合物的薄膜在1 MHz下显示出0.02％的低吸水率和2.38的低介电常数。这些聚酰亚胺在氮气中分解温度高达460摄氏度时显示出良好的热稳定性（5％重量损失）。这些聚（酰亚胺硅氧烷）的透明薄膜显示出高达30 MPa的拉伸强度，断裂伸长率高达103％，这取决于重复单元的结构。流变性质表明这些聚合物易于加工，熔体粘度不随温度变化。 （c）2007年Wiley Periodicals，Inc.

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