Dynamic mechanical analysis on modified bismaleimide resins |
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Authors: | Mariana Cristea C. Gaina Daniela Gheorghiu Ionita Viorica Gaina |
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Affiliation: | (1) ‘Petru Poni’ Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41 A, 700487 Iasi, Romania |
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Abstract: | Polyaminobismaleimides (PAMBI) with diphenyl methane, diphenyl ether and hexamethylene segments were synthesized according to Michael type addition reaction. The modification of PAMBIs with 2-glycidyl-phenyl-ether (GPE) was performed in order to ameliorate the toughness of the products. Dynamic mechanical analysis allowed the study of the processes that concur in the material through curing by tracking the storage modulus (E′) and loss factor (tanδ) changes. The small drop of E′ with increasing temperature in the glass transition region argues for crosslinked structures. The viscoelastic behavior revealed complex processes, i.e., overlapping of glass transition temperature range with intra-and inter-crosslinking. |
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Keywords: | dynamic mechanical analysis polyaminobismaleimides viscoelastic properties |
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