Synthesis and properties of polyimides from 1,4-bis(4-amino-2-phenylphenoxy) benzene and 4,4′-bis(4-amino-2-phenylphenoxy) biphenyl
| العنوان: | Synthesis and properties of polyimides from 1,4-bis(4-amino-2-phenylphenoxy) benzene and 4,4′-bis(4-amino-2-phenylphenoxy) biphenyl |
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| المؤلفون: | Fumi Miyata, Jun Nishimura, Atsushi Morikawa |
| المصدر: | High Performance Polymers. 24:783-792 |
| بيانات النشر: | SAGE Publications, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Biphenyl, Nitrobenzene, chemistry.chemical_compound, Materials science, Polymers and Plastics, chemistry, Organic Chemistry, Materials Chemistry, Benzene, Medicinal chemistry, Polyimide |
| الوصف: | Diamines, namely, 1,4-bis(4-amino-2-phenylphenoxy) benzene (1) and 4,4′-bis(4-amino-2-phenylphenoxy) biphenyl (2), were synthesized from 4-fluoro-3-phenyl nitrobenzene. Two series of polyimides were synthesized from these diamines with nine types of dianhydrides by a conventional two-step procedure that included ring-opening polymerization in N-methyl-2-pyrrolidone and subsequent thermal cyclic dehydration. The polyimides were characterized by x-ray diffraction, differential scanning calorimetry, thermogravimetry and dynamic mechanical analysis. The polyimides from 1 and 2 had a glass transition temperature in the range of 221–254°C and 222–271°C, respectively, and all the polymers were amorphous. The structure–property relationships of these polyimides were examined and compared with those of the previously prepared analogous polyimides from the bis(4-amino-2-biphenyl)ether (3). Water absorption and dielectric constants ( ∊) of the polyimides were compared and discussed on the basis of imide content per repeating unit. |
| تدمد: | 1361-6412 0954-0083 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::edab3561b28354126ab6041760cdf9cfTest https://doi.org/10.1177/0954008312453062Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........edab3561b28354126ab6041760cdf9cf |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13616412 09540083 |
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