Polystyrene-based carbonized microspheres, preparation method and application thereof
A polystyrene-based, carbonized microsphere technology, applied in chemical instruments and methods, dyed high molecular organic compound treatment, dyed low molecular organic compound treatment, etc., can solve the problem that calcium carbonate cannot meet the processing requirements of high polymer materials, etc. , to achieve the effect of improving interfacial compatibility, enhancing compatibility, improving mechanical and flame retardant properties
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[0042] The invention provides a method for preparing polystyrene-based carbonized microspheres, comprising the following steps:
[0043] S10, using a modifier to modify calcium carbonate to obtain modifier-coated calcium carbonate; wherein, the modifier contains a sulfonic acid group and a vinyl group;
[0044] S20, performing a cross-linking polymerization reaction on the calcium carbonate coated with the modifier and styrene under the action of a cross-linking agent and an initiator to obtain polystyrene-coated calcium carbonate;
[0045] S30, carbonizing the polystyrene-based coated calcium carbonate to obtain polystyrene-based carbonized microspheres.
[0046] Above-mentioned calcium carbonate can select light calcium carbonate and heavy calcium carbonate, is preferably light calcium carbonate. Further, calcium carbonate can be directly dispersed in a solvent to prepare a calcium carbonate dispersion to participate in the reaction. Preferably, before the calcium carbonate ...
Embodiment 1
[0093] (1) Weigh 100g light calcium carbonate and 100g dehydrated ethanol in the reaction bottle and fully mix them, put them into an agate jar and ball mill them on a ball mill for 6 hours at a speed of 400rpm, then dry and sieve for subsequent use;
[0094] (2) Transfer 100g of light calcium carbonate after ball milling to a reaction flask with mechanical stirring, then add 100g of water and disperse at a speed of 480rpm for 30min at 60°C;
[0095] (3) After adjusting the stirring speed to 200rpm, slowly add 7g p-vinylbenzenesulfonic acid, react for 2h, (there will be carbon dioxide bubbles to emerge during the reaction), and obtain calcium carbonate coated with modifier;
[0096] (4) keep the temperature at 60°C, slowly add 0.21g styrene, 0.14g divinylbenzene, 0.14g dibenzoyl peroxide (dibenzoyl peroxide is first dissolved in ethanol) in the reaction flask, Carry out cross-linking reaction, obtain polystyrene-based coated calcium carbonate after reaction 2h;
[0097] (5) S...
Embodiment 2
[0125] Present embodiment 2 is basically the same as embodiment 1, and difference is: the program of temperature control is as follows:
[0126] Raise the temperature at a rate of 10°C / min to 250°C, then raise the temperature at a rate of 2°C / min to 280°C for 4 hours, then raise the temperature at a rate of 10°C / min to 400°C, and then increase the temperature at a rate of 5°C / min to 500°C, then raised to 600°C at a rate of 2°C / min for 4 hours, and then cooled to room temperature at a rate of 2°C / min.
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