A bifunctional modifier endowing epoxy resin with outstanding flame retardancy and high impact strength |
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| Authors: | Yichen Han Hui Zhao Lixin Chen Di Ran Jichuan Chen Jia Zhao Tingting Xu |
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| Affiliation: | Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shanxi, China |
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| Abstract: | The flammability and brittleness are two major shortages of epoxy resin (EP). Normally, adding flame retardants can deteriorate the mechanical property of EP. Herein, in this work, a reactive flame retardant (DPPO-TES) containing both Si and P was synthesized and incorporated into EP. When the content of P is only 1.0 wt%, the LOI of the modified EP (DPPO-TES/EP) reaches to 33.2%, UL-94 passes V0, THR and pk-HRR are 377.6 kw/m2 and 103.5 MJ/m2, respectively, which is attributed to the high flame-retardant efficiency in both condense phase and gas phase. In addition, the flexible Si O Si chains in the structure can significantly improve the impact strength of DPPO-TES/EP. Therefore, as a bifunctional modifier, DPPO-TES has a wide application prospect for EP materials. |
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| Keywords: | adhesives copolymers flame retardance |
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