24938-64-5

Basic information

• Product Name: POLY-p-PHENYLENE TEREPHTHALAMIDE
• Synonyms: POLY-p-PHENYLENE TEREPHTHALAMIDE;Poly(imino-1,4-phenyleneiminocarbonyl-1,4-phenylenecarbonyl);Kevlar 49;KEVLAR (R)
• CAS NO: 24938-64-5
• Molecular Formula: C14H10N2O2
• Molecular Weight: 0
• Mol File: 24938-64-5.mol
• Article Data: 7

Chemical Properties

• Melting Point: 550.7 °C
• Appearance: /
• Density: 1.45 g/cm3
• CAS DataBase Reference: POLY-p-PHENYLENE TEREPHTHALAMIDE(CAS DataBase Reference)
• NIST Chemistry Reference: POLY-p-PHENYLENE TEREPHTHALAMIDE(24938-64-5)
• EPA Substance Registry System: POLY-p-PHENYLENE TEREPHTHALAMIDE(24938-64-5)

Safety Data

• Hazardous Substances Data: 24938-64-5(Hazardous Substances Data)

Usage

Chemical Properties

Poly(p-phenylene terephthalamide) is an extraordinarily strong material. The specific tensile strength (tensile strength/density) of the fibre is higher than that of any other continuous fibre commercially available. The polymer does not melt but begins to carbonize at about 425°C. The material retains its mechanical properties over a wide temperature range for prolonged periods. There is little change up to about 180°C and even at 250°C approximately half of the initial tensile strength is retained after 100 hours. The material is attacked by mineral acids and alkalis and is also sensitive to ultraviolet light.

Uses

Poly(p-phenylene terephthalamide) fibres currently have three major applications, namely as reinforcement in radial tyres and mechanical rubber goods, in ballistic protective fabrics and ropes, and as reinforcement in polymer (particularly epoxy) composites for aircraft and aerospace components.

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.

Upstream product

• 59483-84-0 bis(pentafluorophenyl)carbonate 
• 34066-75-6 N,N'-bis(4-aminophenyl)benzene-1,4-dicarboxamide 
• 109-55-7 1-amino-3-(dimethylamino)propane 
• 17746-06-4 n-tridecanoyl chloride 
• 126942-15-2 C₂₂H₁₄Cl₂N₂O₄ 
• 2016-57-1 1-aminodecane 
• 17746-05-3 undecanoyl chloride 
• 56419-58-0 N,N'-Di(4-carbomethoxybenzoyl)-1,4-phenylenediamine 
• 107654-38-6 C₂₂H₁₆N₂O₆ 
• 7377-26-6 4-Methoxycarbonylbenzoyl chloride 
• 106-50-3 1,4-phenylenediamine 
• 138621-61-1 1-(3-Dimethylamino-propyl)-3-(4-nitro-phenyl)-urea 
• 100-28-7 4-Nitrophenyl isocyanate 
• 18520-63-3 monobenzyl terephthalate 

Downstream Products

• 193206-45-0 N-{4-[3-(3-Dimethylamino-propyl)-ureido]-phenyl}-terephthalamic acid 
• 1005197-80-7 C₄₆H₆₆N₄O₄ 

Relevant articles and documents

SELF-ASSEMBLING BIS-UREA COMPOUNDS FOR DRUG DELIVERY

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

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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