Synthesis and properties of hyperbranched polyimides derived from novel triamine with prolonged chain segments |
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| Authors: | Jie Shen Ying Zhang Wenqiu Chen Wenhao Wang Zushun Xu Kelvin W. K. Yeung Changfeng Yi |
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| Affiliation: | 1. Ministry‐of‐Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, , China;2. Division of Spine Surgery, Department of Orthopaedics and Traumatology, The University of Hong Kong, , Hong Kong, China |
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| Abstract: | Novel pyridine‐containing hyperbranched polyimides (HBPIs) were synthesized by using a new triamine 2,4,6‐tris[3‐(4‐aminophenoxy)phenyl]pyridine with prolonged chain segments, ether linkage and meta‐linked units as a BB′2‐like monomer, various commercial aromatic dianhydrides as A2 monomers. Most of the obtained HBPIs were readily soluble in common organic solvents such as N,N‐dimethylformamide, N,N‐dimethylacetamide, N‐methyl‐2‐pyrrolidone, m‐Cresol, and so forth. Meanwhile, they also had good thermal stability with the glass transition temperatures (Tgs) all above 210 °C, the temperature at 10% weight loss of 537.1–574.4 °C in nitrogen atmosphere. Strong and flexible HBPI films were obtained, which had good mechanical properties with tensile strengths of 83.3–95.8 MPa, tensile modulus of 1.82–2.43 GPa and elongations at break of 4.84–6.98%. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2425–2437 |
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| Keywords: | hyperbranched mechanical properties polyimide prolonged chain segment pyridine‐containing triamine |
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