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Synthesis and properties of hyperbranched polyimides derived from tetra-amine and long-chain aromatic dianhydrides

机译：四胺和长链芳烃二氮衍生的超支化聚酰亚胺的合成与性能

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摘要

To investigate the properties of hyperbranched polyimides (HBPIs) for potential optical applications, novel fluorinated tetra-amine monomers with ether and sulfonyl groups, 4,4'-di[3,5-di(2-trifluoromethyl-4-aminophenoxy) phenoxy] sulfone, and five kinds of long-chain dianhydrides, have been designed and synthesized. A series of anhydride-terminated hyperbranched polyimides have been prepared via a two-step method with chemical imidization. The HBPIs possess outstanding solubility and show excellent thermal and optical properties. The glass transition temperatures (T-g) of the HBPIs range from 230-242 degrees C determined by differential scanning calorimetry (DSC), and 232-263 degrees C by thermomechanical analysis (TMA), depending on the dianhydride used. The 5% weight loss temperatures are in the range of 480-533 degrees C, showing high intrinsic thermal-resistant characteristics of the HBPIs. The HBPI films show good optical transparency, higher than 80% at 800 nm. The cast polyimide films have favorable mechanical properties with tensile strengths of 91-112 MPa, elongation at break of 5.99-7.99%, and initial modulus of 2.14-2.57 GPa. The polyimides exhibit average refractive indices of 1.5780-1.6271, and birefringence of 0.0065-0.0079 because of the hyperbranched structure. The PI derived from 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]hexafluoropropane possesses the lowest refractive indices due to the high fluorine content in the polymer chain.
机译：为了研究超支化聚酰亚胺（HBPIs）潜在的光学应用中，用乙醚和磺酰基，4,4'-二[3,5-二（2-三氟甲基-4-氨基苯氧基）苯氧基]新颖的氟化四胺单体的特性砜，五种长链二酐，已设计并合成。一系列酸酐封端的超支化聚酰亚胺已通过与化学酰亚胺化的两步方法制备。所述HBPIs具有出色的溶解性，并显示优良的热和光学性质。所述HBPIs的玻璃化转变温度（T-G）的范围从230-242摄氏度测定通过差示扫描量热法（DSC），和232-263摄氏度通过热机械分析（TMA），取决于所使用的四羧酸二酐。 5％重量损失温度是在480-533℃的范围内，表现出HBPIs的高的固有抗热特性。所述HBPI膜显示出良好的光学透明性，在800nm处大于80％。流延的聚酰亚胺膜具有91-112兆帕的抗张强度，以5.99-7.99％的断裂伸长率，和2.14-2.57吉帕初始模量良好的机械性能。聚酰亚胺表现出由于超支化结构的1.5780-1.6271平均折射率，以及0.0065-0.0079双折射。的PI由2,2-双[4-（3,4-二羧基）苯基]六氟丙烷具有最低折射率由于在聚合物链中的氟含量高的。

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  • 来源
    《RSC Advances》 |2015年第130期|共11页
  • 作者

    Liu Shanyou; Zhang Yunhe; Wang Xueping; Tan Haiwei; Song Ningnig; Guan Shaowei;

  • 作者单位

    Jilin Univ Coll Chem Alan G MacDiarmid Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem Alan G MacDiarmid Lab Changchun 130012 Peoples R China;

    Changchun Univ Sci &

    Technol Optoelect Informat Sci &

    Technol Dept Coll Sci Changchun 130022 Peoples R China;

    Jilin Univ Coll Chem Alan G MacDiarmid Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem Alan G MacDiarmid Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem Alan G MacDiarmid Lab Changchun 130012 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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