Novel functionalized polystyrene resin and preparation method thereof
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A polystyrene resin and functionalization technology, applied in the field of functionalized polystyrene resin and its preparation, can solve the problems of reducing and increasing manufacturing costs, increasing the difficulty of material synthesis, etc., and achieve the effect of high activity of functional groups
Inactive Publication Date: 2019-07-16
CHANGZHOU UNIV
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Too long connecting arms will not only increase the difficulty of material synthesis and increase manufacturing costs, but also increase the mass proportion of connecting arms i
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specific Embodiment 1
[0044] Take 1g of dry PSD resin (cross-linking degree 4%, aldehyde content 4.4mmol / g) in 20ml DMSO to swell at room temperature for 24h, add functional reagent containing 2 times equivalent 1 Mix evenly with 20ml DMSO solution of 2 times the equivalent of potassium hydroxide, react at 60°C for 10h, filter the obtained resin, wash thoroughly with 95% ethanol, 1N aqueous sodium hydroxide solution, deionized water, 1N hydrochloric acid, deionized water successively, and vacuum dry , get the functional material PS- 1 , whose structure is as Figure 7 As shown, the functional group content is 2.7mmol / g.
specific Embodiment 2
[0046] Take 1g of dry PSD resin (cross-linking degree 7%, aldehyde group content 4.3mmol / g), add 15 times equivalent functionalization reagent 2 Mix evenly, heat at 80°C for 12 hours under the protection of nitrogen, wash the resin with 95% ethanol, 1N hydrochloric acid, deionized water, 1N sodium hydroxide aqueous solution and deionized water in sequence, and dry in vacuum to obtain the functional material PS- 2 , whose structure is as Figure 8 As shown, the functional group content is 3.9mmol / g.
specific Embodiment 3
[0048]Take 1g of dry PSD resin (cross-linking degree 7%, aldehyde content 4.3mmol / g), add 40mlDMSO to swell at room temperature for 15h, add 15 times equivalent functional reagent 2 Mix evenly, heat and react at 100°C for 10 hours, filter the obtained resin, wash it thoroughly with 95% ethanol, 1N hydrochloric acid, deionized water, 1N sodium hydroxide aqueous solution, and deionized water in sequence, and dry to obtain the functional material PS- 2 , whose structure is as Figure 8 As shown, the functional group content is 4.1mmol / g.
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Abstract
The invention discloses novel functionalized polystyrene resin. The novel functionalized polystyrene resin is prepared by performing a condensation reaction on aldehyde-based polystyrene resin and a primary amino-containing functionalization reagent, wherein a -CH=N- linking arm structure is formed between the aldehyde-based polystyrene resin and the primary amino-containing functionalization reagent, and a coplanar rigid structure is formed by the -CH=N- linking arm structure and a benzene ring in the polystyrene resin through conjugation. A preparation method of the novel functionalized polystyrene resin comprises the following steps: step 1, adding the dried aldehyde-based polystyrene resin (PSD) into an organic solvent, and performing swelling at room temperature; step 2, adding the primary amino-containing functionalization reagent H2N-Fg, performing uniform mixing, and performing a reaction for a period of time; and step 3, cooling the mixture obtained after the reaction in the step 2 is performed, performing filtration, washing the obtained solid, and performing drying. The functionalized polystyrene resin provided by the invention can also be prepared from the PSD and the H2N-Fg under solvent-free conditions. According to the novel functionalized polystyrene resin and the preparation method thereof provided by the invention, the preparation process is simple, and the functional group content per unit weight of the resin material is high.
Description
technical field [0001] The invention relates to a novel functionalized polystyrene resin and a preparation method thereof, belonging to the technical field of organic functional polymer materials. Background technique [0002] Modification of polystyrene PS with functional group Fg is the main method to prepare polystyrene resin materials with specific functions. The functional group and the polystyrene body can be connected directly through chemical bonds, or indirectly through connecting arms with a certain chemical structure. For example, the preparation functional group is amino (-NH 2 ) polystyrene functional material, which can be directly connected to the amino group on the polystyrene body through nitration-reduction to obtain resin I (structure such as figure 1 ), the polystyrene body can also be chloromethylated and then connected with ammonia to obtain resin II (structure such as figure 2 ). [0003] Resin Ⅰ belongs to the aromatic amine structure, and the fu...
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