Pyrrolidon, Capryllactam und Laurinlactam als neue Grundstoffe für Polyamidfasern

Abstract

Man sieht in Abb. 3, daB beide GroBen im trockenen und feuchten Zustand stark frequenzabhangig sind. Die Abhangigkeit ist oberhalb lo3 Hz schwacher als bei niedrigeren Frequenzen. Mechanische EigenschaftenObwohl die mechanischen Eigenschaften vom Molekulargewicht, den MeBbedingungen, der thermischen Behandlung, den Extrusions-und Reckbedingungen abhangen und entsprechend in weiten Grenzen schwanken, gibt Tabelle 4 einige mittlere Werte wieder.Der endlose Faden hat bei einer Dehnung von 2 5 bis 40 % eine ReiBfestigkeit von 6 bis 7 g/den. Der Elastizitatsmodul liegt bei 5 0 bis 60 g/den.

Uniaxial tensile viscoelastic and viscoplastic behaviour of Nylon 12 at constant strain rate

“…15-0 . 2 in the temperature range studied 10 Variation in E 0 with temperature above and below T g of Nylon 12 11 Variation in E 1 with temperature above and below T g of Nylon 12…”

“…This change can be better represented by producing a graph of temperature versus E 0 , E 1 , f 0 or f 1 from which the transition can be best observed (see Figs. [10][11][12][13]. Trend lines were used to illustrate the change in the constants either side of the glass transition.…”

“…2% moisture at saturation. [9][10][11] Nylon 12 is a semicrystalline material with spherulites of various types distributed within an amorphous matrix, the main stable crystal type of Nylon 12 being the c-modification with a pseudo hexagonal unit cell with a5b50 . 478 nm and c (chain direction)53 .…”

Improved Bioproduction of the Nylon 12 Monomer by Combining the Directed Evolution of P450 and Enhancing Heme Synthesis

“…[ 1 , 2 ]. At present, the industrial production of PA12 mainly adopts the oxidation process, with butadiene as the raw material [ 3 ], but this process has problems such as the use of toxic and harmful raw materials, the need for a high reaction temperature, the dependence on nonrenewable petrochemical raw materials and the environmental stress caused. In contrast, the biosynthesis of the PA12 monomer from renewable resources is a green and sustainable process with mild reaction conditions, and it has thus emerged as a promising alternative.…”

Συνθεση Και Μελετη Πολυμερων Ανιονικου Πολυμερισμου Οκτανολακταμης Και Λαυρολακταμης (Συμπολυαμιδια Ναυλον-8/12)

“…Εκτός από τις αντιδράσεις αυτές προόδου του πολυμερισμού (7)(8) (13,(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)9) 12, 7 (12,3-13,5) 10,9 (9,0-12,0) 9,2 (8,0-10,1) 7,7 (7,0-8,1) 6,8 (6,(6)(7),1) 2,8 (2,8) 6,8 (5,7) 10,5 (9,(9)(10)(11)8) 10,4 (9,(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)2) 11,6 (10,(6)(7)(8)(9)(10)(11)(12)7) AH C (cal/g) 11,3 (10,0-12,4) 9,4 (9,1-9,9) 9,4…”