24938-64-5 Usage
Description
POLY-p-PHENYLENE TEREPHTHALAMIDE, commonly known as PPTA, is an extraordinarily strong synthetic polymer with a high specific tensile strength, making it superior to any other commercially available continuous fiber. It does not melt but begins to carbonize at around 425°C and retains its mechanical properties over a wide temperature range. However, it is sensitive to mineral acids, alkalis, and ultraviolet light.
Uses
Used in Tire and Rubber Industry:
POLY-p-PHENYLENE TEREPHTHALAMIDE is used as a reinforcement material in radial tires and mechanical rubber goods for its exceptional strength and ability to enhance the durability and performance of these products.
Used in Ballistic Protection and Ropes:
In the safety and defense industry, POLY-p-PHENYLENE TEREPHTHALAMIDE is utilized as a reinforcement in ballistic protective fabrics and ropes, providing high-strength protection against ballistic threats.
Used in Polymer Composites for Aircraft and Aerospace:
POLY-p-PHENYLENE TEREPHTHALAMIDE is employed as a reinforcement material in polymer composites, particularly epoxy, for aircraft and aerospace components. Its high strength and temperature resistance make it an ideal choice for these applications, where reliability and performance are crucial.
Preparation
Poly(p-phenylene terephthalamide) is produced by reaction of terephthaloyl
chloride and p-phenylenediamine:
Full details of the manufacture of the polymer have not been disclosed. The
reaction is reported to be carried out in a solvent mixture of hexamethylphosphoramide
and N -methylpyrrolidone. The polymer is supplied in fibre form.
Poly(p-phenylene terephthalamide) is an extraordinarily strong material.
Check Digit Verification of cas no
The CAS Registry Mumber 24938-64-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,4,9,3 and 8 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 24938-64:
(7*2)+(6*4)+(5*9)+(4*3)+(3*8)+(2*6)+(1*4)=135
135 % 10 = 5
So 24938-64-5 is a valid CAS Registry Number.
24938-64-5Relevant articles and documents
SELF-ASSEMBLING BIS-UREA COMPOUNDS FOR DRUG DELIVERY
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Paragraph 0096, (2015/02/19)
Cationic, anionic, and/or zwitterionic bis-urea compounds self-assemble by non-covalent interactions in aqueous solution to form high aspect ratio nanofibers. The nanofibers reversibly bind drugs by non-covalent interactions, forming drug compositions for exhibiting sustained release of the drug.
Effect of chain ends on the structure of aramid oligomers
Mehenni, Hakim,Guillou, Helene,Tessier, Christian,Brisson, Josee
, p. 7 - 19 (2008/09/19)
Synthesis, X-ray diffraction, and Fourier transform, infrared spectroscopy of aliphatic-aromatic aramid oligomers are reported with the aim of shedding light on the effect of end-chain substituent on the morphology and structure of poly(para-phenylene terephthalamide) or PPTA. Three types of X-ray powder diffraction patterns were observed: one similar to that of PPTA form I, one similar to that of PPTA form II, and an additional form never reported. Some compounds, differing by their internal distribution of amide-aromatic rings, adopt two different crystal structures, whereas compounds having the same internal amide-aromatic arrangements, but differing by the nature of the end-groups, can adopt the same crystal structure. This clearly shows that both factors influence the packing adopted by the chains. Single-crystal structures of two polymorphs of a nitro-terminated model compound were resolved; both forms incorporate dimethyl formamide, and both show completely different packing. Infrared amide I and II band positions of most studied compounds match those observed for PPTA forms I or II, indicating that they exhibit planar hydrogen bonded sheets of molecules.
AMIDO PEROXYCARBOXYLIC ACIDS FOR BLEACHING
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, (2008/06/13)
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