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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and crosslinking behavior of a soluble, crosslinkable, and high young modulus poly(arylene ether nitriles) with pendant phthalonitriles
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Synthesis and crosslinking behavior of a soluble, crosslinkable, and high young modulus poly(arylene ether nitriles) with pendant phthalonitriles

机译：具有侧苯二甲腈的可溶性，可交联高杨氏模量聚（亚芳基醚腈）的合成和交联行为

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摘要

Poly(arylene ether nitriles) (PEN) with pendant phthalonitrile groups (PEN-CN) were obtained via the Yamazaki-Higashi phosphorylation route of 4-(4-aminophenoxy)phthalonitrile (APN) with acid-contained PEN (PEN-COOH) in the presence of CaCl _2. The chemical structure and molecular weight of PEN-CN were characterized by ~1H-NMR, Fourier transform infrared spectroscopy, and Gel permeation chromatography. The synthesized PEN-CN had superior solubility in polar organic solvent and can be easily processed into thin films from the solutions of N-methylpyrrolidone, dimethylsulfoxide, N,N'-dimethylformamide, dimethylacetamide, and tetrahydrofuran. Compared with PEN-COOH, PEN-CN showed higher thermal stability with 5% weight loss temperatures (T _(5%)) up to 430°C. The glass transition temperature of PEN-CN was improved from 211 to 235°C measured by differential scanning calorimetry (DSC). In addition, it also exhibited excellent mechanical properties that Young's modulus reached to 3.5 GPa. Meanwhile, the effects of different aromatic amines and Lewis acid on the crosslinking behavior of PEN-CN were investigated by DSC. The results indicated that anhydrous Zinc chloride (ZnCl _2) was the best catalyst to lower the curing temperature among 2,6-bis(4-diaminobenzoxy) benzonitrile, 4,4-diaminediphenyl sulfone, APN and ZnCl _2.
机译：通过4-（4-氨基苯氧基）邻苯二甲腈（APN）与含酸的PEN（PEN-COOH）的Yamazaki-Higashi磷酸化路线，获得了带有邻苯二甲酰基侧基（PEN-CN）的聚（亚芳基醚腈）（PEN）。 CaCl _2的存在。 PEN-CN的化学结构和分子量通过〜1H-NMR，傅立叶变换红外光谱和凝胶渗透色谱进行了表征。合成的PEN-CN在极性有机溶剂中具有优异的溶解性，可以很容易地从N-甲基吡咯烷酮，二甲基亚砜，N，N'-二甲基甲酰胺，二甲基乙酰胺和四氢呋喃的溶液中加工成薄膜。与PEN-COOH相比，PEN-CN在高达430°C的情况下具有5％的失重温度（T _（5％）），显示出更高的热稳定性。通过差示扫描量热法（DSC）测量，PEN-CN的玻璃化转变温度从211℃提高到235℃。此外，它还表现出优异的机械性能，杨氏模量达到3.5 GPa。同时，通过DSC研究了不同的芳香胺和路易斯酸对PEN-CN交联行为的影响。结果表明，在2,6-双（4-二氨基苯并）苄腈，4,4-二胺二苯砜，APN和ZnCl_2中，无水氯化锌（ZnCl_2）是降低固化温度的最佳催化剂。

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