Synthesis and preparation of biobased benzoxazine/bismaleimide copolymers: Thermal, mechanical and dielectric properties
A low dielectric constant biobased benzoxazine/bismaleimide copolymer is developed with a green synthesis strategy. [Display omitted] •A unique benzoxazine monomers (E-dea) with active allyl terminations were synthesized using a green synthesis strategy.•Poly(E-dea/BMI) have outstanding thermal, mec...
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Published in | European polymer journal Vol. 179; p. 111524 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
05.10.2022
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | A low dielectric constant biobased benzoxazine/bismaleimide copolymer is developed with a green synthesis strategy.
[Display omitted]
•A unique benzoxazine monomers (E-dea) with active allyl terminations were synthesized using a green synthesis strategy.•Poly(E-dea/BMI) have outstanding thermal, mechanical and low dielectric performances.•The nature behind these attractive performances of poly(E-dea/BMI) was intensively investigated.
Preparation of low dielectric thermosetting resins by green method is a challenging subject. Herein, unique bio-based benzoxazine monomer E-dea was prepared by a solvent-free method using eugenol as phenol source, and then E-dea and bismaleimide (BMI) were copolymerized to prepare poly(E-dea/BMI-0.86) and poly(E-dea/BMI-1). The comprehensive properties including thermal, mechanical and dielectric properties of the copolymers were studied. Notably, poly(E-dea/BMI-0.86) and poly(E-dea/BMI-1) exhibit low dielectric properties with dielectric constants of 2.85 and 2.79 at 1 MHz, respectively. Besides, the glass transition temperature (Tg), the initial thermal decomposition temperature (Tdi) and the flexural strength of poly(E-dea/BMI-0.86) and poly(E-dea/BMI-1) are 167 °C and 169 °C, 333 °C and 321 °C and 115 ± 3.5 MPa and 123 ± 4.9 MPa, respectively. The excellent comprehensive performance is attributed to the interaction between flexible and low dielectric decane segments and rigid oxazine and BMI segments. |
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ISSN: | 0014-3057 1873-1945 |
DOI: | 10.1016/j.eurpolymj.2022.111524 |