Methylene blue sensitizer and its application in photo-Fenton-induced raft reaction
A technology of methylene blue and polymerization reaction, applied in the field of polymer materials, can solve difficult problems such as high efficiency and safety, and achieve the effects of easy acquisition, good time control, and low price
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Embodiment 1
[0044] A kind of polymer 1, its preparation comprises the steps: take 1.6mg methylene blue, 13.1mg CPADB, 17uL H 2 O 2 , 1 mL of methyl methacrylate and 1 mL of DMSO were added to a test tube with a capacity of 5 mL (no need to seal), after which the test tube was placed in a photoreactor, and the reaction was carried out under the irradiation of red light for 0.5 h in frozen methanol. Purification 3 times gave polymer 1.
[0045] The conversion rate was 14% (the percentage of monomers converted to the starting monomers), the molecular weight of the polymer measured by gel permeation chromatography (GPC) was 5290, and the polymer dispersibility index (PDI) was 1.23.
Embodiment 2
[0047] A kind of polymer 2, its preparation comprises the steps: take 1.6mg methylene blue, 13.1mg CPADB, 17uL H 2 O 2 , 1mL methyl methacrylate and 1mL DMSO were added to a test tube with a capacity of 5mL (no need to seal), then the test tube was placed in a photoreactor, irradiated with red light for 1 hour, and purified 3 times in frozen methanol to obtain a polymerization thing 2.
[0048] The conversion rate was 35%, the molecular weight of the polymer measured by GPC was 8933, and the molecular weight distribution PDI was 1.24.
Embodiment 3
[0050] A kind of polymer 3, its preparation comprises the steps: take 1.6mg methylene blue, 13.1mg CPADB, 17uL H 2 O 2 , 1 mL of methyl methacrylate and 1 mL of DMSO were added to a test tube with a capacity of 5 mL (no need to seal), then the test tube was placed in a photoreactor, irradiated with red light for 2 hours, and purified 3 times in frozen methanol to obtain polymerization. item 3.
[0051] The conversion rate was 95%, the molecular weight of the polymer measured by GPC was 11511, and the molecular weight distribution PDI was 1.82.
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