Synthesis and Characterization of Easily Colored Meta-aramid Copolymer Containing Ether Bonds
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This work described the preparation of easily colored meta-aramid (PMIA) copolymers from m-phenylenediamine (MPD), isophthaloyl dichloride (IPC), and 3,4′-oxydianiline (3,4′-ODA) via solution polycondensation in N,N-dimethylacetamide (DMAc). The novel co-PMIAs were obtained in relatively high inherent viscosities ranging from 1.32 dL/g to 2.53 dL/g, which could be easily cast into flexible films with high transparence or spun into fibers. All the newly synthesized copolymers possessed excellent thermal stabilities even better than that of commercial PMIA, with 5% weight loss temperatures higher than 430 °C in nitrogen measured by TGA and glass transition temperature of 267–277 °C measured by DSC. The cast films exhibited good mechanical properties with a tensile strength up to 107 MPa and a tensile modulus up to 2.2 GPa. The resultant PMIAs also showed good solubility and better dye ability for cationic dyes.
KeywordsCopolymerized meta-aramid Solution polycondensation Dyeability
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This work was financially supported by the National Natural Science Foundation of China (No. 51473031) and the Shanghai International S&T Cooperation Fund (No. 16160731302).
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