Caprolactam hexane

Hexanehexol. See D-Mannitol 6-Hexanelactam. See Caprolactam Hexane, 1-methoxy-. See Methyl hexyl ether Hexane, 1,1 -oxybis-. See n-Hexyl ether Hexane, 1,1 -oxybis (2-ethyl)-. See Di (2-... 

These rapid systems are used predominantly for (adiabatic) polymerizations below the melting point of PA 6. These cases allow one to prepare PA6 (97% conversion) with more than 40% crystaUtnity, often with both a and y phases. If difunctional NCL are used, for example, l,6-di(carbamoyl-e-caprolactam)hexane, HDICL18, the polymer product contains up to 80% of gel (insoluble in CF3CH2OH), which improves the mechanical properties [16, 17, 40]. 

Many analytical techniques are in use for the qualitative and quantitative evaluation of monomers and oligomers extracted from PA6 (GC, differential refrac-tometry, IR, PC, SEC, HPLC, RPLC, etc.). FTIR has been used for quantitative analysis of caprolactam oligomer content (extract %) in polyamide-6 [113], The method, which involves a 3h extraction in boiling methanol, is suitable for process control and plant environment. Kolnaar [114] has used FTIR characterisation of fractional extracts with pentane, hexane, and heptane of HDPE for blow moulding applications. Vinyl acetate in packaging film has similarly been determined by quantitative FUR. 

The deoxygenative ring expansion of nitrobenzene with tri-n-butylphosphine in butanol (77BCJ2013), or with phosphorus trichloride and di-n-butylamine in hexane, followed by catalytic reduction and hydrolysis of the resulting 2-butoxy- or 2-butylamino-3//-azepines have been patented as methods for the production of caprolactam (78JAP(K)78132586, 77GEP2647936 respectively). 

PTFE/PDMS can be obtained via a similar process [112]. PTFE chains are trapped in the PDMS network during casting. Jones et al. [113] also patented a process where adipic acid and hexane diamine (or f -caprolactam [114]) were added to a silicone latex leading to the formation of a polyamide/PDMS semi-IPN. 

Nylon 6,6 and nylon 6 are polyamides. These polymers are used in carpets, in hosiery, and in certain cases as engineering plastics. Nylon 6,6 8.19, is the condensation product between adipic acid and 1,6-diamino hexane. Nylon 6 8.20 is made from caprolactam by ring-opening polymerization. 

Hexan-3-one. See 3-Hexanone Hexanone isoxime. See Caprolactam Hexanoyl chloride, 2-ethyl-. See 2-Ethylhexanoyl chloride... 

Hexetidine 90] Hexetidine 99. See Hexetidine Hexoic acid. See Caproic acid Hexoic aldehyde. See Hexanal 1,6-Hexolactam. See Caprolactam Hexomax . Seeinvertase Hexone. See Methyl isobutyl ketone n-Hexoxyethoxyethanol. See Diethylene glycol n-hexyl ether Hexyl acetate... 

Crystallization of nylon-6 has been carried out from solution. - Shish-kebab structures were obtained from solutions of butane-l,4-diol in the latter case, while crystallization from hexane-1,2,6-triol produced lamellar single crystals. The chain-repeat distances in the a-phase crystal have been measured from —150 to 150 The wide-angle X-ra.y scattering, and isotope xchange extinction coefficients, as well as JT-ray diffraction measurements have all been applied to the examination of crystal structure and molecular packing of nylon-6. Cyclic oligomers of caprolactam with 2—7 units in the chain have been found to migrate to the surface of nylon-6 filament when it is exposed to either water or alcohol vapour. "... 

Adipoaldehyde can be transformed via formylcyclopentene into hydroxyl-methylcyclopentane [71]. Moreover, it is a high-value intermediate for producing e-caprolactam and adipic acid/hexamethylene-l,6-diamine (HMDA). Both are key monomers in nylon-6.6 and nylon-6 manufacture. Alternatively, hexane-1,6-diol, which is a valuable monomer in the synthesis of polyesters, can be derived by hydrogenation. 

Zanoaga, M. Novel thermoplastic copolyamides based on caprolactam, 1,6-hexane diamine. Synthesis and study of properties. In Proceedings of 12th Romanian International Conference on Chemistry and Chemical Engineering, September 13-15, 2001, Bucurejti, Romania, pp. 125-130... 

Another group of block copolymers which has been studied is that of poly (e-caprolactam)-iilock-polydiene elastomers. Originally (see Ref [52]), hydroxy-terminated polybutadienes (PBDs) were functionalized by diisocyanates, mostly by toluene diisocyanate (TDI), 23. Polymerizations were performed first in solvents for polydienes, such as hexane or decalin [54], and later in the monomer phase [55], but neither the yields nor the mechanical properties of the products proved satisfactory. 

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