(1. Polymer Science & Materials, Chemical Engineering College, Dalian University of Technology, Dalian, 116024, China. 2. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China)
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DOI:
10.7502/j.issn.1674-3962.2015.12.06
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Abstract:
There has been a great deal of recent effort centered on low-cost copper catalyst Ullmann polycondensation. In the past decade, the monomers used in Ullmann polycondensation are mostly electron-deficient di-halogenated compounds. The molecular weight are highly depends on the reaction activities of monomers. In this research, the polymerizations are successfully proceed between the electron-deficient phthalazinone structure and strong electron donating thiophene structure. The obtained copolymers are fully characterized by GPC and 1H-NMR. Their 5% weigh loss temperatures are higher than 382 ℃. The char yield of the investigated polymers in the nitrogen atmosphere is in the range of 63~76% at 800 ℃, confirming their excellent thermal stability and meeting the demand of the optical device for thermal performance. Also, the wavelength of the luminescence can be controlled by changing the content of thiophene structures in the polymer backbones. Furthermore, our research could enrich and diversify the typical polyarylether family containing phthalazinone structure. And it is of great guiding significance for developing the novel functional polymers based on Ullmann Polymerization.