Aqueous phase preparation method of maleic anhydride-conjugated diene copolymer
A technology of maleic anhydride and conjugated diene, which is applied in the field of aqueous phase preparation of maleic anhydride-conjugated diene copolymer, can solve the problems of high pollution and toxicity, impact on the environment and human health, and achieve improved reaction Efficiency, the effect of improving the induction efficiency
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[0035] Example one:
[0036]
[0037] Add 9.806g of maleic anhydride, 0.304g of RAFT-1, 0.108g of N,N-dimethylethanolamine and 40.000g of distilled water to the reactor and stir to dissolve; heat to 60℃, slowly add 5.409g of isoprene and 0.304 g ammonium persulfate initiator, stirring at a constant speed; after the addition, the temperature is increased to 95-100°C and the reaction is continued for 2h; the temperature is reduced to room temperature, and the pH is adjusted to neutral with alkali to obtain the aqueous solution of maleic anhydride-isoprene copolymer. The viscosity average molecular weight is 19700, and the molecular weight distribution is 2.0.
Example Embodiment
[0038] Embodiment two:
[0039]
[0040] Add 9.806g of maleic anhydride, 0.304g of RAFT-5, 0.108g of N,N-dimethylethanolamine and 40.000g of distilled water to the reactor and stir to dissolve; heat to 65℃, slowly add 5.409g of isoprene and 0.304 g ammonium persulfate initiator, stirring at a constant speed; after the addition, the temperature is increased to 95-100°C and the reaction is continued for 2h; the temperature is reduced to room temperature, and the pH is adjusted to neutral with alkali to obtain the aqueous solution of maleic anhydride-isoprene copolymer. The viscosity average molecular weight is 18,000, and the molecular weight distribution is 1.8.
Example Embodiment
[0041] Embodiment three:
[0042]
[0043] Add 9.806g maleic anhydride, 0.304g RAFT-1, 0.108g pentaerythritol triacrylate and 40.000g distilled water into the reactor and stir to dissolve; heat to 70°C, slowly add 5.409g isoprene and 0.304g ammonium persulfate Initiator, stirring at a constant speed; after the addition, the temperature is raised to 95-100°C and the reaction is continued for 2h; the temperature is reduced to room temperature, and the pH is adjusted to neutral with alkali to obtain an aqueous solution of maleic anhydride-isoprene copolymer with a viscosity average molecular weight of 18,500 , Molecular weight distribution is 1.7.
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