Polyphenylene terephthalamide fibre and preparation method thereof
A technology of poly-p-phenylene terephthalamide and para-phenylene terephthalamide is applied in the field of high-performance poly-p-phenylene terephthalamide fiber and its preparation technology, and can solve the difficulty of fiber technology , affecting industrial efficiency and other issues, to achieve the effect of a wide range of applications, low industrial cost and high efficiency
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Embodiment 1
[0041] A kind of terephthalamide p-phenylene diamide fiber (PPTA), is prepared from poly-p-phenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 4.5dL / g, and its logarithmic viscosity Compared with the logarithmic viscosity of the polymer, the decline rate is less than 0.5dL / g. The specific indicators of the high-performance poly-paraphenylene terephthalamide fiber (PPTA) include: the yarn denier is 300 denier, and the strength is 18 grams per denier. The elongation is 3.2%, the modulus is 350 g / denier, the moisture content is 3%, and the logarithmic viscosity is 4.0 dL / g.
[0042] A preparation method of poly-p-phenylene terephthalamide fiber (PPTA), comprising polymerization and spinning steps, wherein:
[0043] A. Polymerization
[0044] (a) Polymerization raw materials include:
[0045] p-phenylenediamine (p-phenylene diamine) [PPD],
[0046] Terephthaloyl chloride [TPC],
[0047] The solvent is (N-methyl pyrrolidone) [NMP],
[0048] Polymerization-...
Embodiment 2
[0057] A kind of poly-p-phenylene terephthalamide fiber (PPTA), which is prepared from poly-p-phenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 8.0dL / g, and its logarithmic The viscosity is lower than the polymer logarithmic viscosity by less than 0.5dL / g, and the specific indicators of the high-performance polyparaphenylene terephthalamide fiber (PPTA) include: bundle yarn denier 3000 denier, strength 26 g / denier , Elongation 3.8%, modulus 650 g / denier, water content 10%, logarithmic viscosity 7.0dL / g.
[0058] A preparation method of poly-p-phenylene terephthalamide fiber (PPTA), comprising polymerization and spinning steps, wherein:
[0059] A. Polymerization
[0060] (a) Polymerization raw materials include:
[0061] p-phenylenediamine (p-phenylene diamine) [PPD],
[0062] Terephthaloyl chloride [TPC],
[0063] The solvent is (N-methyl pyrrolidone) [NMP],
[0064] Polymerization-assisting salt (i.e. co-solvent) is calcium chloride (CaCl 2 );
...
Embodiment 3
[0073] A kind of poly-p-phenylene terephthalamide fiber (PPTA), which is prepared from a poly-p-phenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 6.0dL / g, and its logarithmic Compared with the polymer logarithmic viscosity, the decrease rate of viscosity is less than 0.5dL / g. The specific indicators of the high-performance poly-p-phenylene terephthalamide fiber (PPTA) include: bundle yarn denier 2000 denier, strength 20 g / denier , Elongation 3.5%, modulus 500 g / denier, water content 6%, logarithmic viscosity 5.0dL / g.
[0074] A preparation method of poly-p-phenylene terephthalamide fiber (PPTA), comprising polymerization and spinning steps, wherein:
[0075] A. Polymerization
[0076] (a) Polymerization raw materials include:
[0077] p-phenylenediamine (p-phenylene diamine) [PPD],
[0078] Terephthaloyl chloride [TPC],
[0079] The solvent is (N-methyl pyrrolidone) [NMP],
[0080] Polymerization-assisting salt (i.e. co-solvent) is calcium chloride ...
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