Synthesis and characterization of novel polyimides derived from 3, 6-bis(4-aminophenoxy)pyridazine. (June 2014)

• Record Type: Journal Article
• Authors: Guan, Yue; Wang, Daming; Song, Guangliang; Zhang, Xingdi; Chen, Chunhai; Zhou, Hongwei; Dang, Guodong; Zhao, Xiaogang
• Is Part Of: High performance polymers. Volume 26:Number 4(2014:Jun.)
• Page Start: 455
• Page End: 462
• Publication Date: 2014-06
• Subjects: Polyimide synthesis -- pyridazine -- heterocyclic diamine; Polymerization -- Periodicals; Polymers -- Periodicals; 547.7
• DOI: 10.1177/0954008313518566
• Languages: English
• ISSNs: 0954-0083

Abstract

Pyridazine-containing aromatic diamine monomer, 3, 6-bis(4-aminophenoxy)pyridazine (APPD), was successfully synthesized by a nucleophilic substitution reaction of 3, 6-dichloropyridazine with para -aminophenol. The aromatic heterocyclic diamine was employed to synthesize a series of polyimides (PIs) by polycondensation with various commercially available aromatic dianhydrides in N, N -dimethylacetamide via the conventional two-step method and further thermal imidization forming polyimides. The inherent viscosities of the resulting poly (amic acid)s were in the range of 0.47–1.51 dL g −1 . Meanwhile, strong and flexible PI films were obtained, which had good thermal resistance, with the glass transition temperatures of 214–305°C and the temperature at 5% weight loss of 421–463°C under nitrogen atmosphere, as well as outstanding mechanical properties with tensile strengths of 61–102 MPa and elongations at break of 2.8–64.7%. The cutoff wavelength of the PI films were ranged in 357–413 nm.