- Facile synthesis of new aromatic polyamides based on 1,2-dihydro-2-(4-carboxylphenyl)-4-[4-(4-carboxyl-phenoxy)-3-methylpheny l]phthalazin-1-one
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- 论文类型： 期刊论文
- 发表时间： 2005-02-01
- 发表刊物： CHINESE JOURNAL OF CHEMISTRY
- 收录刊物： Scopus、SCIE
- 卷号： 23
- 期号： 2
- 页面范围： 200-203
- ISSN号： 1001-604X
- 关键字： poly(arylene ether amide); heterocyclic polymer; high-performance polymer; direct polycondensation; phthalazinone
- 摘要： A new monomer diacid, 1,2-dihydro-2-(4-carboxylphenyl)-4-[4-(4-carboxylphenoxy)-3-methylphenyl]phthalazin-1-one (3), was synthesized through the aromatic nucleophilic substitution reaction of a readily available unsymmetrical phthalazinone 1 bisphenol-like with p-chlorobenzonitrile in the presence of potassium carbonate in N,N-dimethylacetamide and alkaline hydrolysis. The diacid could be directly polymerized with various aromatic diamines 4a-4e using triphenyl phosphite and pyridine as condensing agents to give five new aromatic poly(ether amide)s 5a-5e containing the kink non-coplanar heterocyclic units with inherent viscosities of 1.30-1.54 dL/g. The polymers were readily soluble in a variety of solvents such as N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMA), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidinone (NMP), and even in m-cresol and pyridine (Py). The transparent, flexible and tough films could be formed by solution casting. The glass transition temperatures T-g were in the range of 286-317 degreesC.
