THERMAL AGEING BEHAVIOR OF POLY(p-PHENYLENE TEREPHTHALAMIDE) FIBER聚对苯二甲酰对苯二胺纤维的热老化行为与机理研究对位芳纶热老化力学性能结晶取向在250～400℃空气中对自由状态下对位芳纶进行等温热老化处理,采用万能材料试验机,红外光谱法,广角X射线衍射法,声速法和特性黏数法表征了老化过程中力学性能和结构的...
英文名称: POLY-p-PHENYLENE TEREPHTHALAMIDE 英文同义词: Poly(imino-1,4-phenyleneiminocarbonyl-1,4-phenylenecarbonyl);Kevlar 49;KEVLAR (R);POLY-p-PHENYLENE TEREPHTHALAMIDE;NylonPPD-T;Poly(p-phenylene diamine-co-terephthalic acid) CAS号: 24938-64-5 分子式: C14H10N2O2 分子量: 0 EINECS号: ...
POLY-p-PHENYLENE TEREPHTHALAMIDE 1.2 Synonyms KEVLAR (R); Kevlar 49; Poly(imino-1,4-phenyleneiminocarbonyl-1,4-phenylenecarbonyl); 1.3 CAS No. 24938-64-5 1.5 Molecular Formula C14H10N2O2 1.6 Canonical Smiles *NC1=CC=C(NC(=O)C2=CC=C(C=C2)C(*)=O)C=C1 1.7 Isomers Smiles *NC1=CC...
Poly(p-phenyleneterephthalamide)/carbonnanotubecompositemembrane:PreparationviapolyanionsolutionmethodandmechanicalpropertyenhancementShidongLiu,GuohuaLuo*,FeiWeiBeijingKeyLaboratoryofGreenReactionEngineeringandTechnology,TsinghuaUniversity,Beijing100084,PRChinaarticleinfoArticlehistory:Received23June2015Receivedinrevisedform...
The evolution of structure and properties of poly(p-phenylene terephthalamide) (PPTA) with different hydrothermal aging temperatures were systematically investigated. The cooperative change in tensile strength and reduced viscosity upon aging time indicated a direct chemical structure-property correlation. ...
Miscibility characteristics of poly-p-phenylene terephthalamide (PPTA) with nylon 6, nylon 66, nylon 11, and nylon 12 have been examined by means of differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD). Mixtures of PPTA/nylon 6, 66, 11, and 12 and amorphous ...
PPTA (poly (p-phenylene terephthalamide)) may precipitate directly from stirred solution by the use of glycerol or glycerol/water coagulant in fibrous pulp formshort fibers with attached fine fibrils that are called PPTA pulp. Scanning electron micrographs show that the precipitated PPTA pulps have...
SUBSTANCE: process involves interaction of equimolar amounts of p-phenylenediamine and terephthaloyl dichloride in solution of N-methyl-2-pyrrolidone with calcium chloride carried out in cylindrical reactor provided with single stirring motor used both as stirrer and as granulator. Stirring is effected...
Poly( p -phenyleneterephthalamide) of high molecular weight was obtained when the polycondensation of terephthalic acid and p -phenylenediamine was carried out in N -methylpyrrolidone (NMP) that contained dissolved CaCl 2 and LiCl in th... F Higashi,Shin-Ichi Ogata,Y Aoki - 《Journal of Pol...
Poly(p-phenylene terephthalamide) (PPTA) single crystals and negative spherulites obtained from concentrated sulfuric acid solution were studied by polarizing microscopy, transmission electron microscopy, electron diffraction, and infrared spectroscopy techniques. Electron microscopy shows that the single ...