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A meta-aromatic polyamide (PMIA) was first synthesized in 1962, a new polyamide varieties. Because of its excellent high temperature performance spinnability, the PMIA the fiber and paper products are widely used in industrial and apparel in the high temperature of the occasion, but also plays an irreplaceable role. As demand increases for high-performance fibers, meta-aromatic polyamide has been a great development. However, due to the molecular structure of the PMIA fibers close, high crystallinity, small molecule dyes is difficult to enter the fiber macromolecular internal difficulties, resulting in staining, which seriously hindered the development of aramid fibers, in particular thermostable colored PMIA fibers. In this thesis, the impact of the PMIA the synthesis various impurities and PMIA slurry solidification performance, as well as coloring PMIA fiber preparation, a lot of research and exploration work. First of all, in the polymerization system, were added to a certain amount of impurities such as methanol, ethanol, acetic acid, ethylamine, and conducted a series of the PMIA polymerization test, viscosity method measured by the molecular weight of the polymer in order to examine a variety of impurities in the polymerization system in the polymerization the influence of the reaction, and then determine the minimum content of various impurities. The recycling of the solvent on the polymerization process, reduce costs, and PMIA industrial mass production of important guiding significance. Secondly, in order to facilitate the observation and study of the solidification process of double diffusion, using a macro model, i.e. diameter of about 1.0cm cylindrical stream solidification in the coagulation bath. Because of DMAc density less than the density of water, with the DMAc and water the double diffusion, the solidification of the sample weight began to increase in the DMAc and water a spinning coagulation bath system, its weight with the coagulation time of the change reflects the solidification process speed. This macro model, compared with the actual spinning trickle certain volume effect, but essentially reflect the process of the double diffusion kinetics solidified samples between the coagulation bath coagulation molding and double for the actual spinning process understanding of the diffusion mechanism and process parameters were studied with a certain degree of comparability. Finally, the dope-coloring method according to the wet spinning process, prepared the PMIA coloring fibers, and its mechanical properties, dyeing depth and thermal gravimetric analysis and testing of the degree of orientation, and its chemical structure, etc. The results show that: the liquid coloring The the PMIA fibers of the mechanical properties are affected pigment added in an amount of the impact is small. Innovative points of this thesis is: 1, the system that may occur in the the PMIA polymerization process impurity analysis, discussion of the impact of each impurity to the polymerization reaction, and gives each impurity in the polymer does not affect the PMIA slurry the minimum content of the spinning the DMAc recovery in the process of spinning PMIA certain guiding significance. In the country have not systematically reported, some innovative. 2, on the basis of the wet spinning of the PMIA, the use of dope-coloring method, a system of the coloring PMIA fibers. Although our study PMIA fiber has been more than 10 years, but the coloring PMIA fiber is still blank, the prepared liquid coloring coloring PMIA fiber is innovation.
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