WebThe transesterification of dimethyl naphthalate (DMN) with ethylene glycol (EG) was kinetically investigated in the presence of various catalysts at 185 °C. The transesterification was assumed to obey first-order kinetics with respect to DMN and EG, and a rate equation was derived. The rate constant of transesterification which calculated from the quantity of … WebMar 10, 2010 · Poly(ethylene 2,6-naphthalate)/MWNT nanocomposites prepared by in situ polymerization: Rheological and mechanical properties
Did you know?
WebAug 1, 2001 · The blends of poly(ethylene naphthalate) (PEN) and poly(ethylene terephthalate) (PET) were obtained by melt blending at 310°C for 2 min and quenching into an ice water. WebApr 1, 2012 · It appears that the low pressure treatment by oxygen plasma [6], reducing the water contact angle to 11°–14° after 3 s and to nonmeasurable values after 30 s, is much more effective in reducing the contact angle values.It can be speculated, however, that such a dramatic increase in the surface energy is associated with the undesired formation of …
WebDec 2, 2011 · PEN is thought to have increased thermal and hydrolytic resistance in comparison to PET. However, due to a lack of research, few studies have been … WebOct 23, 2024 · This research synthesizes novel copolyester (PCITN) containing biobased isosorbide, 1,4-cyclohexandimethanol, terephthalic acid, and 2,6-naphthalene dicarboxylic acid and characterize its properties. The PCITN copolyester was extruded into film, and its performance properties including: tensile strength, Young’s modulus, thermal, …
WebRemoval of Microorganisms from Fluid Samples Using Nanofiber Filtration Media: 申请号: US16053523: 申请日: 2024-08-02: 公开(公告)号: US20240015533A1 WebLuigi Sorrentino, Marco D' Auria, Eugenio Amendola, Poly(ethylene Terephthalate)—PET and Poly(ethylene Naphthalate)—PEN, High Performance Polymers and Their …
WebSep 30, 2024 · Abstract The effect of the direct current discharge treatment on the contact properties of polyethylene naphthalate films has been studied. The change in the contact angles of wettability by water and glycerin, the work of adhesion, total surface energy, and its polar and dispersion components on the time of plasma treatment at the anоde and …
WebJan 1, 2024 · Keywords. Poly (ethylene naphthalate) [poly (ethylene-2,6-naphthalene dicarboxylate), PEN] is a relatively new polyester fiber. This polymer has very similar structure to PET, but the phenylene ring is replaced by a naphthalene ring. It is made by polycondensation of naphthalene dicarboxylic acid (NDA) and ethylene glycol. timetable\\u0027s hwPolyethylene naphthalate (poly(ethylene 2,6-naphthalate) or PEN) is a polyester derived from naphthalene-2,6-dicarboxylic acid and ethylene glycol. As such it is related to poly(ethylene terephthalate), but with superior barrier properties. See more Two major manufacturing routes exist for polyethylene naphthalate (PEN), i.e. an ester or an acid process, named according to whether the starting monomer is a diester or a diacid derivative, respectively. In both cases for … See more Because it provides a very good oxygen barrier, it is well-suited for bottling beverages that are susceptible to oxidation, such as beer. It is also used in making high … See more The two condensed aromatic rings of PEN confer on it improvements in strength and modulus, chemical and hydrolytic resistance, gaseous barrier, thermal and thermo-oxidative … See more parish of caddo parksWebWe claim: 1.A multilayer porous nanofiber containing filtration medium made by electrospinning a polymer, wherein the filtration medium exhibits full retention of Brevundimonas diminuta by size-based separation as measured in accordance with ASTM F838-83 and a liquid permeability greater than about 1000 LMH/psi, and wherein the … parish of causeway ballyduffWebMar 1, 2014 · Poly(ethylene-2,6-naphthalate) (PEN) has been considered for these applications because of its robust structural characteristics, and its scintillation light in the blue wavelength region. timetable\\u0027s ofWebMar 15, 2004 · Poly(ethylene naphthalate) (PEN) is a thermoplastic polyester with performance properties superior to that of poly(ethylene terephthalate) (PET). timetable\u0027s ofWebA cyclic process for highly selective SiO 2 etching with atomic-scale precision over Si 3 N 4 was developed by using BCl 3 and fluorocarbon gas chemistries. This process consists of two alternately performed steps: a deposition step using BCl 3 mixed-gas plasma and an etching step using CF 4 /Ar mixed-gas plasma. The mechanism of the cyclic process … timetable\\u0027s tyWebMar 29, 2007 · Conformational Characteristics, Configurational Properties, and Thermodynamic Characteristics of Poly(ethylene terephthalate) and Poly(ethylene-2,6 … parish of celbridge and straffan