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Date of Publication:2022-10-10

Journal:材料研究学报

Issue:3

Page Number:333-336

ISSN No.:1005-3093

Abstract:A novel aromatic diamine, 2-(4-aminophenyl)-4-[2-methyl-4-(4-aminophenoxy)]-2, 3-phthalazin-1-one(MM-DA), was used to prepare a series of new aromatic polyamides by using Yamazaki phthosphorylation method, which had a high molecular mass with the inherent viscosities in 1.72-2.08 dL&middotg-1. The structure of polymers obtained was confirmed by FT-IR and 1H-NMR. These polymers had glass transition temperature of 315-337°C and 5% mass loss temperature above 440°C in nitrogen atmosphere. All the polyamides were readily soluble in polar solvent such as IMMP or DMAc. The polyamide films had tensile strength of 81-99 MPa, elongation to break of 11.4%-20.8% and tensile modulus of 1.91-2.34 GPa. The aromatic polyamides with the twisted and noncoplanar phthalazinone units had good thermostability, solubility and mechanical properties.

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