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Pentaethylenehexamine is a hexadentate ligand, owing to the Lewis basicity of the six amine groups. [3] Pentaethylenehexamine is in the category of polyethyleneamines and is part of mixtures of these sold commercially. [2] Commercial supplies of pentaethylenehexamine contain, in addition to the linear form, branched and cyclic polyamines. [2]
Tetraethylenepentamine (TEPA) is an organic compound and is in the class of chemicals known as ethyleneamines. It is a slightly viscous liquid and is not colorless but, like many amines, has a yellow color.
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There are two main routes for the production of ethyleneamines, the reaction between ethylene dichloride and ammonia, and the reductive amination of monethanolamine.World capacity of ethyleneamines for the year 2001 was estimated to be 385,000 tonnes/year, with the majority comprising the ethylene dichloride route.
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The properties of polyethylene depend strongly on type. The molecular weight, crosslinking, and presence of comonomers all strongly affect its properties. It is for this structure-property relation that intense effort has been invested into diverse kinds of PE. [7] [19] LDPE is softer and more transparent than HDPE. For medium- and high-density ...
They differ in their properties according to their chemical composition (homo-or copolyester, contained hydroxy fatty acids). They are UV stable, in contrast to other bioplastics from polymers such as polylactic acid, partial ca. temperatures up to 180 °C, and show a low permeation of water. The crystallinity can lie in the range of a few to 70%.
The Properties of Polyethylene Crystallized Under the Orientation and Pressure Effects of a Pressure Capillary Viscometer, Journal of Applied Polymer Science vol. 14, pp. 2305–2317 (1970). Kanamoto, On Ultra-High Tensile by Drawing Single Crystal Mats of High Molecular Weight Polyethylene, Polymer Journal vol. 15, No. 4, pp. 327–329 (1983).