https://research-information.bris.ac.uk/ws/files/85196910/Revised_manuscript_3.pdf

Modern advances in bismaleimide resin technology: A 21st century perspective on the chemistry of addition polyimides

Synthesis of star-shaped allyl phosphazene small molecules for enhancing fire safety and toughness of high performance BMI resin

Preparation of a novel polysiloxane and its synergistic effect with ammonium polyphosphate on the flame retardancy of polypropylene

Construction of porous g-C3N4@PPZ tubes for high performance BMI resin with enhanced fire safety and toughness

We have successfully synthesized high performance bismaleimide based hexa(eugenol)cyclotriphosphazene (HECTP) resin which possess good mechanical, excellent thermal stability at high temperature and flame retardant properties. Hexa(eugenol)cyclotriphosphazene (HECTP) were obtained by the reaction of sodium, eugenol (EG) and hexachlorocyclotriphosphazene (HCCP). 1 H NMR and 31 P NMR were employed to confirm the formation of (HECTP). NMR analysis of the HECTP showed that all chlorine (Cl) atoms of HCCP were successfully substituted by sodium (Na) atom of the sodium eugenol. The 4,4′-bismaleimidodiphenylmethane (BMI) was reacted with EG and HECTP to produce BMI-EG1/1 resin with maleimide/allyl unit ratios of 1/1 and BMI-HECTP resins with maleimide/allyl unit ratios of 1/1, 1.5/1, 2/1, 2.5/1 and 3/1, respectively. The characterization results of TGA showed that HECTP could greatly enhance the thermal stability, the residues of BMI-HECTP 1/1, 1.5/1, 2/1, 2.5/1, 3/1 resins were 61%, 63.9%, 68%, 66.2% and 65% respectively. Besides, their flame retardancy were excellent, and the LOI values of all BMI-HECTP resins were 39%, 48.4%, 50.1%, 49.8% and 48.9% respectively, and the results of all BMI-HECTP resins at UL-94 vertical burning tests reached V-0 level and extinguished at once after removing the flame agitator. The flexural strength (77.77–100.03 MPa) of all BMI-HECTP resins was higher than that of BMI-EG1/1 (73.93 MPa). Furthermore, the impact strength of BMI-HECTP1/1, BMI-HECTP1.5/1 and BMI-HECTP 2/1 were 12.4, 13.3 and 11.94 KJ·m − 2 , respectively, higher than that of BMI-EG1/1(9.42 KJ·m − 2 ), except for BMI-HECTP 2.5/1 (9.19 KJ·m − 2 ) and BMI-HECTP3/1 (6.14 KJ·m − 2 ).

Hexa(eugenol)cyclotriphosphazene modified bismaleimide resins with unique thermal stability and flame retardancy

An improved method is developed to synthesize octavinylsilsesquioxanes (VPOSS) with shorter time and higher yield, and then VPOSS is used to prepare new hybrids based on bismaleimide-triazine (BD/CE) resin, coded as VPOSS/BD/CE. The effect of the content of VPOSS on the key properties including curing behavior, thermal, mechanical, and dielectric properties as well as water resistance of VPOSS/BD/CE hybrids were systematically discussed. Compared with BD/CE resin, hybrids show similar curing behavior but different chemical structures and thus macro-performance. These key properties of hybrids are dependent on the content of VPOSS, all hybrids show significantly improved dielectric properties, water resistance, and dimensional stability; moreover, the hybrids with suitable content of VPOSS have bigger impact strengths. Specifically, with the addition of 7 wt% VPOSS to BD/CE resin, the dielectric constant decreases from 3.7 to 3.2, the dielectric loss decreases 55%, and the coefficient of thermal expansion reduces 23%; moreover, the glass transition temperature and initial decomposition temperature increase about 15°C. The attractive integrated properties suggest that VPOSS/BD/CE hybrids have great potential to be used as structural and functional materials for many cutting-edge fields. Copyright © 2011 John Wiley & Sons, Ltd.

High efficiency synthesis of octavinylsilsesquioxanes and its high performance hybrids based on bismaleimide‐triazine resin

The invention discloses a halogen-free non-phosphorus silicon-containing flame retardant and a preparation method thereof. The flame retardant is a hyperbranched silicon resin containing multiple maleimide groups, has the branching degree of 0.5-0.6 and the molecular weight of 2500-3400 and is liquid at normal temperature. The preparation method comprises the following steps: synthesizing a trialkyl silane solution containing maleimide, performing controlled hydrolysis, and performing suction filtration, reduced pressure distillation and drying, thereby obtaining the halogen-free non-phosphorus silicon-containing flame retardant. The flame retardant contains the maleimide groups and can be copolymerized with an imide ring at a certain temperature, good interaction is obtained when the reactivity is controlled, and the storage stability, reactivity control and flame retardant property of the modified resin are fully exerted. The flame retardant contains multiple maleimide groups and a flexible Si-O-Si chain, so that the modified resin has the outstanding advantages of rigidity, toughness and heat resistance. The preparation method of the flame retardant is environment-friendly, simple, feasible, short in synthesis period, rich in raw material source, wide in applicability and high in yield.

Halogen-free non-phosphorus silicon-containing flame retardant and preparation method thereof

Unique liquid multi-maleimide terminated branched polysiloxane and its flame retarding bismaleimide resin with outstanding thermal and mechanical properties

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Papers

High efficiency synthesis of octavinylsilsesquioxanes and its high performance hybrids based on bismaleimide‐triazine resin

Halogen-free non-phosphorus silicon-containing flame retardant and preparation method thereof

Unique liquid multi-maleimide terminated branched polysiloxane and its flame retarding bismaleimide resin with outstanding thermal and mechanical properties