Abstract
An anhydride monomer containing ether oxide bridge, 7-oxa-bicyclo[2,2,1]hept-5-ene-2,3-dicarboxylic anhydride (ONA), was successfully synthesized by Diels-Alder reaction of furan and maleic anhydride. The ONA was also studied as an end-cap for the polymerization of monomer reactant (PMR) type polyimides. Three molecular weight levels of the ONA end-capped PMR resins were evaluated. The effects of process conditions of these novel PMR resins on thermal and mechanical properties were investigated. It was demonstrated that the imidized prepolymers using the end-cap have good processability, and the cured polyimide specimens exhibited good thermal stability. The initial decomposition temperature, T d (ca. 580°C) and glass transition temperature, T g (330°C) of the novel resin (PI-20), prepared under optimum process conditions, compare favorably with the T d (ca. 620°C) and T g (ca. 348°C) of the state-of-the-art resin (PI′-20), respectively.
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This work was financially supported by the Research Foundation of State Key Laboratory of Applied Organic Chemistry.
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Gong, Cl., Li, Yf., Yang, Hx. et al. Characterization and thermal stability of PMR polyimides using 7-oxa-bicyclo[2,2,1]hept-5-ene-2, 3-dicarboxylic anhydride as end caps. Chin J Polym Sci 29, 741–749 (2011). https://doi.org/10.1007/s10118-011-1089-8
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DOI: https://doi.org/10.1007/s10118-011-1089-8