Aramid copolymer
A technology for polymer and p-phenylenediamine, which is applied in the field of preparing aromatic polyamide polymers, and can solve problems such as control of positions without monomer components
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[0064] NMP, DMAC, LiCl, CaCl 2 , DAPBI, PPD and TCl were obtained from commercial sources.
example 1
[0066] Add 83.71 g of NMP / CaCl to a 1 L reactor equipped with frame stirrer, nitrogen inlet / outlet 2 Premix (8.3% by weight (weight of salt / total weight of salt and solvent)), 161.65 grams of NMP (N-methyl-2-pyrrolidone], 12.282 grams (0.055 moles) of DAPBI (5(6)-amino-2 - (p-aminophenyl)benzimidazole), 4.250 g (0.023 mol) of PPD.2HCl (p-phenylenediamine dihydrochloride), and stirred at room temperature. Unlike the case of adding PPD, all solid materials Dissolve completely within 30 minutes under stirring. The clear solution is light blue. The reaction mixture is stirred and cooled to below 10° C. in an ice-water bath. At this point, 5.560 grams (0.027 moles) of TCl are added in one go and stirred under nitrogen 5 minutes. The ice water bath was removed and a second portion of TCl, 10.325 grams, was added in one portion and stirred slowly for 30 seconds, and then the stirrer speed was increased to maximum. The solution became very viscous, gelled, and eventually rubberized T...
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