Process for forming an aramid copolymer
A technology of polymers and oligomers, which is applied in the field of preparing aromatic polyamide polymers, and can solve problems such as the control of the position of monomer components that do not have
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[0062] NMP, DMAC, LiCl, CaCl 2 , DAPBI, PPD and TCl were obtained from commercial sources.
example 1
[0064] Add 104.64 g of NMP / CaCl to a 1 L reactor equipped with frame stirrer, nitrogen inlet / outlet 2 Premix (8.3% by weight (salt weight / total weight of salt and solvent)), 177.09 grams of NMP (N-methyl-2-pyrrolidone), and 2.539 grams (0.023 moles) of PPD (p-phenylenediamine), and Stir for 10 minutes. The contents were stirred in an ice-water bath to cool the mixture to below 10°C. Add 9.536 g (0.047 mol) TCl in one portion and stir for 5 minutes. The ice water bath was removed and 12.288 grams (0.055 moles) of DAPBI were added and stirred. The solution became very viscous and gelled within about 4 minutes. The highly viscous reaction mixture was stirred for an additional 25 minutes. Transfer the resulting polymer to blender and ground into small particles, then washed several times to remove solvent (NMP / CaCl 2 ) and excess HCl produced by the reaction. The polymer was then neutralized with sodium bicarbonate and finally washed several times with water to obtain a ne...
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