24938-64-5

Usage

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.

Upstream product

• 100-20-9 terephthaloyl chloride 
• 122-80-5 N-acetyl-p-phenylenediamine 
• 141238-56-4 C₃₂H₃₂N₂O₄Si₂ 
• 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 
• 7377-26-6 4-Methoxycarbonylbenzoyl chloride 
• 106-50-3 1,4-phenylenediamine 
• 956313-83-0 C₆₈H₇₂N₈O₈ 
• 58860-88-1 CH₃NHCOC₆H₄COCl 
• 138621-61-1 1-(3-Dimethylamino-propyl)-3-(4-nitro-phenyl)-urea 
• 100-28-7 4-Nitrophenyl isocyanate 
• 18520-63-3 monobenzyl terephthalate 
• 193206-44-9 1-(4-Amino-phenyl)-3-(3-dimethylamino-propyl)-urea 

Downstream Products

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

Relevant academic research and scientific papers

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.

CATIONIC BIS-UREA COMPOUNDS AS EFFECTIVE ANTIMICROBIAL AGENTS

A cationic bis-urea compound is disclosed of formula (1): wherein: each m is independently an integer of 0 to 4,each k is independently 0 or 1,each Z′ is a monovalent radical independently selected from the group consisting of hydroxyl (*—OH), carboxyl (*—COOH), cyano (*—CN), nitro (*—NO2), sulfonate (*—SO3?), trifluoromethyl (*—CF3), halides, amine groups, ketone groups, alkyl groups comprising 1 to 6 carbons, alkoxy groups comprising 1 to 6 carbons, thioether groups comprising 1 to 6 carbons, and combinations thereof,each L′ is independently a divalent alkylene group comprising 1 to 6 carbons, wherein a *-[-L′-]k- is a single bond when k is 0,each Y′ is independently a monovalent non-polymeric radical comprising a positive charged amine, andeach X′ is independently a negative charged counterion.

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.

Aramidocalix[4]arenes as new anion receptors

Calix[4]arenes bearing aromatic amide (aramid) moieties at the upper rim display interesting recognition properties toward anions and in particular versus planar trigonal nitrate and Y-shaped benzoate. Molecular modeling and DFT calculations indicate that the high affinity displayed by aramidocalix[4]arenes 3 and 4 for nitrate anion is likely due to the planar arrangement of the NH groups, which form an unusual six-hydrogen-bond scheme with nitrate anion.

Two-ring DNA minor-groove binders consisting of readily available, di-substituted benzene derivatives

DNA minor-groove binders consisting of two disubstituted benzene rings were prepared. Two ligands showed sequence selectivities higher than some of the best known minor-groove binders containing six-membered rings. Reversing the orientation of amide linkages in one ligand leads to another one with relaxed binding to AT sequences and greatly increased affinity toward GC sequences.

Synthesis of ethynyl-substituted benzoyl chlorides and of related α, ω-ethynyl oligomers

Isophthaloyl and terephthaloyl chlorides can react with half an equivalent of bis-trimethylsilyl acetylene (BTMSA) to afford 3- and 4-ethynyl substituted beonzoyl chlorides, key intermediates in the synthesis of various mono- and di-ethynyl oligomers.