A kind of bulk chemical modification method of polymer
A chemical modification and polymer technology, applied in the field of polymers, can solve problems such as high cost and limited application prospects
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[0057] In the present invention, there is no special limitation on the preparation sequence of the first masterbatch and the second masterbatch.
[0058] After the first masterbatch and the second masterbatch are obtained, the first masterbatch, the second masterbatch, the free radical polymerizable monomer and the polymer are mixed and heated for reaction to obtain the bulk chemically modified polymer.
[0059] Wherein, the molecular structure of the free radical polymerizable monomer contains a free radical polymerizable unsaturated double bond, preferably the monomer is glycidyl methacrylate, acrylic acid, methacrylic acid derivatives, acrylic acid derivatives, ethylene One or more of base siloxane, maleic anhydride, maleimide and maleimide derivatives; when the monomer contains a double bond, the polymer can be grafted Bulk modification; chemical crosslinking of polyolefins can be achieved when the monomers contain multiple double bonds. In special cases, when the monomer...
Embodiment 1～3
[0066] Fully mix 32g of high-density polyethylene powder (HDPE) and 0.64g of bis(pentafluorophenyl)methanone (BFBP) in an experimental high-speed mixer, and then add it to a 60cc torque rheometer produced by Shanghai Kechuang In the process, the preheating temperature of the torque rheometer is 175° C., the rotation speed is 30 rpm, and the carbonyl compound / HDPE masterbatch (2wt%) is obtained after fully mixing for 5 minutes.
[0067] N-hydroxy-2,2,6,6-tetramethylpiperidinol acetate (NHPA) / HDPE masterbatch (2wt%) was prepared by the same method as above, and the O-H fracture energy in NHPA molecule was 62kcal / mol.
[0068] The N-hydroxyoctylamide (NHO) / HDPE masterbatch (2wt%) was prepared by the same method as above, and the O-H fracture energy in the NHO molecule was 79kcal / mol.
[0069] The N-hydroxyl-2.3-pyridinedicarboximide (NHPI) / HDPE masterbatch (2wt%) was prepared by the same method as above, and the O-H fragmentation energy in the NHPI molecule was 89kcal / mol.
[00...
Embodiment 4～9
[0076] Adopt the method for implementation example 1 to prepare respectively benzophenone (BP) / HDPE (2wt%), diphenylsulfoxide (DPS) / HDPE (2wt%), p-trifluoromethyldiphenylsulfoxide (TFDPS) , benzoin dimethyl ether (BDE) / HDPE (2wt%), xanthone (XTO) / HDPE (2wt%) and cyclohexanone (CH) / HDPE (2wt%) masterbatch;
[0077] Mix 5 parts of the 6 carbonyl compound or sulfinyl compound masterbatches prepared above with 5 parts of N-hydroxyoctylamide (NHO) / HDPE masterbatch (2wt%), 2 parts of maleic anhydride (MAH) and 100 parts respectively The HDPE powder was added to a 60cc torque rheometer produced by Shanghai Kechuang. The torque rheometer was preheated at 200°C and the rotation speed was 50 rpm. After fully mixing for 5 minutes, MAH chemically modified HDPE was obtained.
[0078] The resulting MAH chemically modified HDPE was pressed into a 20 μm thick film, extracted with acetone for 36 hours to remove ungrafted MAH and N-hydroxyl compounds, and then vacuum-dried at 90°C overnight, an...
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