摘要:
In an embodiment, a polyamide composition, comprises an anionically polymerized polyamide; wherein the polyamide composition has a crystallinity of greater than or equal to 45 wt% as determined by DSC; and a porosity of greater than or equal to 10 vol% as determined based on the density of the polyamide composition. In another embodiment, a method of making the preceding polyamide composition, which comprises anionically polymerizing a monomer mixture comprising a cyclic lactam monomer, a solvent in which the cyclic lactam monomer is soluble, a catalyst, and an activator to form the anionically polymerized polyamide.
摘要:
The subject invention pertains to peptide-based materials comprising cross-linked peptides with random amino acid sequences that are soluble in water or ethanol before crosslinking but insoluble in water after crosslinking.
摘要:
Die Erfindung betrifft einen Reaktor in Form eines VK-Rohrs (VK: Vereinfacht kontinuierich), für die Polymerisation von Polyamiden, wobei der Reaktor in einen oberen und unteren Reaktorbereich unterteilt ist, die unabhängig voneinander regelbar sind. Ebenso betrifft die Erfindung ein Verfahren zur Herstellung von Polyamiden, bei dem ein derartiger Reaktor eingesetzt wird.
摘要:
The present invention relates to a gas storage tank, for storing gas, especially CNG, methane and/or hydrogen, said tank comprising a liner comprising a high-viscosity polyamide composition comprising a branched polyamide and an impact modifier, and to a process for manufacturing said the tank. More particularly, the composition comprises a copolyamide of the random tree type resulting from the reaction between a multifunctional monomer comprising at least three reactive functions to form an amide function, these functions being of two different types, difunctional monomers conventionally used in the manufacture of linear polyamides, and optionally difunctional monomers.
摘要:
For laser sintering, a material includes at least one powder that has been treated by heat to modify at least one of: a melting temperature of the at least one powder; and a recrystallization temperature of the at least one powder and results in the narrowing of the melting curve of the treated material relative to the untreated material. The heating can include a series of heating steps. The treatment improves the efficacies of the SLS process and product quality.
摘要:
Die vorliegende Erfindung betrifft Polyamid-Formteil erhältlich durch anionische Polymerisation eines Lactams enthaltend Mikrokapseln mit einem Kapselkern aus Latentwärmespeichermaterial und einem Polymer als Kapselwand, Verfahren zu ihrer Herstellung sowie ihre Verwendung in im Fahrzeugbau, als Batteriegehäuse, als Gehäuse für elektronische Kleingeräte und für Warmhaltesysteme für Speisen.
摘要:
The present invention generally relates to processes for the chemocatalytic conversion of a pentose source to a glutaric acid product. The present invention includes processes for the conversion of pentose to a glutaric acid product via pentaric acid or derivatives thereof. The present invention also includes processes comprising the catalytic oxidation of pentose to pentaric acid and catalytic hydrodeoxygenation of pentaric acid or derivatives thereof to a glutaric acid product.