High-flame-retardance polycarbonate material and preparation method thereof
A polycarbonate, high flame-retardant technology, applied in the field of polymer materials and its preparation, can solve the problems of insufficient flame retardancy, unfavorable storage, poor heat resistance, etc. Improved effect
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Embodiment 1
[0017] In a 250mL four-necked flask equipped with a stirrer, a thermometer, a condenser, and a constant pressure funnel, add 21mmol of bisphenol A, 9mmol of bisphenol S, 45mmol of NaOH, 420mL of water, 3mmol of triethylamine and 3mmol of tetrabutylammonium bromide; Dissolve 12.5 mmol triphosgene in 60 mL CH 2 Cl 2 Under strong stirring, it was added dropwise into the reaction flask within 40 minutes, and the reaction was continued at 35°C for 20 minutes. Separate the organic phase, wash the organic phase with 3% hydrochloric acid, then wash with deionized water until neutral, and use 0.02mol / L AgNO 3 Solution identified as Cl-free ‐ Finally, it was poured into anhydrous methanol for precipitation to obtain a gel-like polymer. Filter, wash with distilled water, and dry under vacuum at 70°C for 24 hours to obtain polycarbonate I.
Embodiment 2
[0019] In a 250mL four-neck flask equipped with a stirrer, a thermometer, a condenser, and a constant pressure funnel, add 15mmol of bisphenol A, 15mmol of bisphenol S, 45mmol of NaOH, 420mL of water, 3mmol of triethylamine and 3mmol of tetrabutylammonium bromide; Dissolve 12.5 mmol triphosgene in 60 mL CH 2 Cl 2 Under strong stirring, it was added dropwise into the reaction flask within 40 minutes, and the reaction was continued at 35°C for 20 minutes. Separate the organic phase, wash the organic phase with 3% hydrochloric acid, then wash with deionized water until neutral, and use 0.02mol / L AgNO 3 Solution identified as Cl-free ‐ Finally, it was poured into anhydrous methanol for precipitation to obtain a gel-like polymer. Filter, wash with distilled water, and vacuum-dry at 70°C for 24 hours to obtain polycarbonate II.
Embodiment 3
[0021] In a 250mL four-necked flask equipped with a stirrer, a thermometer, a condenser, and a constant pressure funnel, add 9mmol of bisphenol A, 21mmol of bisphenol S, 45mmol of NaOH, 420mL of water, 3mmol of triethylamine and 3mmol of tetrabutylammonium bromide; Dissolve 12.5 mmol triphosgene in 60 mL CH 2 Cl 2 Under strong stirring, it was added dropwise into the reaction flask within 40 minutes, and the reaction was continued at 35°C for 20 minutes. Separate the organic phase, wash the organic phase with 3% hydrochloric acid, then wash with deionized water until neutral, and use 0.02mol / L AgNO 3 Solution identified as Cl-free ‐ Finally, it was poured into anhydrous methanol for precipitation to obtain a gel-like polymer. Filter, wash with distilled water, and vacuum-dry at 70°C for 24 hours to obtain polycarbonate III.
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