A kind of polymethacrylimide foam with uniform pores and preparation method thereof
A polymethacrylimide and foam technology, which is applied to the field of polymethacrylimide foam and its preparation, can solve the problems of increased cost, complicated procedures, insignificant effects, etc., and achieves increased intermolecular force, The effect of improving heat resistance
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Embodiment 1
[0031] A preparation method of polymethacrylimide foam with uniform pores, comprising the steps of:
[0032] According to the number of parts by mass, 50 parts of acrylic acid, 50 parts of acrylonitrile, 5 parts of the third comonomer, 3 parts of initiator, 5 parts of foaming agent, 3 parts of crosslinking agent, 3 parts of nucleating agent, 3 parts of isobutylene Copper ethyl acetoacetate and bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride doped high-temperature-resistant surfactant were mixed uniformly, reacted in a water bath at 50°C for 200 hours, and then heated at 100 ℃ treatment for 50 hours to obtain a transparent prepolymer; the transparent prepolymer was treated at 170 ℃ for 3 hours and at 220 ℃ for 3 hours to obtain a PMI foam.
[0033] The high-temperature-resistant surfactant containing copper acetoacetate ethyl methacrylate and bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride doped high-temperature-resistant surfactant is prepared according to the followin...
Embodiment 2
[0042] A preparation method of polymethacrylimide foam with uniform pores, comprising the steps of:
[0043] According to the mass parts, 40 parts of acrylic acid, 40 parts of methacrylonitrile, 1 part of the third comonomer, 1 part of initiator, 1 part of foaming agent, 1 part of crosslinking agent, 1 part of nucleating agent, 1 part of Mix the high-temperature-resistant surfactant containing copper ethyl methacrylate acetoacetate and bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride doped evenly, react in a water bath at 30°C for 30 hours, and then Treat the transparent prepolymer at 80°C for 10 hours; treat the transparent prepolymer at 140°C for 1 hour, and treat the transparent prepolymer at 200°C for 1 hour to obtain a PMI foam.
[0044] The high-temperature-resistant surfactant containing copper acetoacetate ethyl methacrylate and bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride doped high-temperature-resistant surfactant is prepared according to the following sche...
Embodiment 3
[0053] A preparation method of polymethacrylimide foam with uniform pores, comprising the steps of:
[0054] According to the mass parts, 60 parts of methacrylic acid, 60 parts of methacrylonitrile, 10 parts of the third comonomer, 5 parts of initiator, 10 parts of blowing agent, 5 parts of crosslinking agent, 5 parts of nucleating agent, Mix 5 parts of high-temperature-resistant surfactant containing copper acetoacetate ethyl methacrylate and bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic acid anhydride doped evenly, and react in a water bath at 80°C for 500 hours , and then treated at 130°C for 100 hours to obtain a transparent prepolymer; after treating the transparent prepolymer at 190°C for 5 hours, and at 240°C for 5 hours, a PMI foam was obtained.
[0055] The high-temperature-resistant surfactant containing copper acetoacetate ethyl methacrylate and bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride doped high-temperature-resistant surfactant is prepared according to the f...
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