摘要:
Provided is an end modified polyamide resin containing 1 to 20% by mass of an end structure represented by the following general formula (I) and 0.1 to 5% by mass of an end structure represented by the following general formula (II):
-X-(R 1 -O) m -R 2 (I)
wherein m represents 2 to 100; R 1 represents a divalent hydrocarbon group having 2 to 10 carbon atoms, and R 2 represents a monovalent hydrocarbon group having 1 to 30 carbon atoms; -X- represents -NH-, -N(CH 3 )- or -(C=O)-; and m R 1 s in the general formula (I) may be the same or different, and
-Y-R 3 (II)
wherein R 3 represents a monovalent hydrocarbon group having 1 to 30 carbon atoms; and -Y- in the general formula (II) represents -(C=O)- when X in the general formula (I) is -NH- or -N(CH 3 )-, Y in the general formula (II) represents -NH- or -N(CH 3 )- when X in the general formula (I) is -(C=O)-.
摘要:
A method for the generation of oligomers or a mixture of oligomers to form a chemical library by amide-forming oligomerization comprises the steps of 1) reacting a mixture of at initiator (I) with monomer (M) to form a dimer of the initiator (I) and the monomer (M) or a pre-oligomer with an initiator (I) attached to a chain of more than one monomer (M) or a mixture thereof by amide-bond formation; 2) optionally adding at least one terminator (T) for the formation of a linear oligomer or a mixture of linear oligomers by amide-bond formation; or, for the formation of a cyclic oligomer or a mixture of cyclic oligomers by amide-bond formation, changing the reaction conditions relative to step 1) so as to form a linking covalent bond between the at least one initiator (I).
摘要:
An object of the present invention is to provide a composite semipermeable membrane which has practical water permeability and removing properties and has a high boron removal ratio even after contact with chlorine. A composite semipermeable membrane of the present invention is a composite semipermeable membrane including a substrate, a porous supporting layer and a separation functional layer, which are superposed in this order, in which the separation functional layer includes a crosslinked fully aromatic polyamide, and the crosslinked fully aromatic polyamide has a molar ratio (amide group content) between a total molar proportion of a polyfunctional amine and a polyfunctional aromatic halide and a molar proportion of an amide group of 0.86-1.20.
摘要:
The present invention relates to a novel polyamide synthesized from biobased monomers. The novel polyamide comprises the repeating unit of formula (I) below: Formula (I), in which R represents a covalent bond or a divalent hydrocarbon-based chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics. The present invention also relates to the process for preparing the said polyamide, to its uses, and to articles and compositions comprising the polyamide.
摘要:
An object of the present invention is to provide a composite semipermeable membrane which has practical water permeability and removing properties and has a high boron removal ratio even after contact with chlorine. A composite semipermeable membrane of the present invention is a composite semipermeable membrane including a substrate, a porous supporting layer and a separation functional layer, which are superposed in this order, in which the separation functional layer includes a crosslinked fully aromatic polyamide, and the crosslinked fully aromatic polyamide has a molar ratio (amide group content) between a total molar proportion of a polyfunctional amine and a polyfunctional aromatic halide and a molar proportion of an amide group of 0.86-1.20.
摘要:
A method for the generation of oligomers or a mixture of oligomers to form a chemical library by amide-forming oligomerization comprises the steps of 1) reacting a mixture of at initiator (I) with monomer (M) to form a dimer of the initiator (I) and the monomer (M) or a pre-oligomer with an initiator (I) attached to a chain of more than one monomer (M) or a mixture thereof by amide-bond formation; 2) optionally adding at least one terminator (T) for the formation of a linear oligomer or a mixture of linear oligomers by amide-bond formation; or, for the formation of a cyclic oligomer or a mixture of cyclic oligomers by amide-bond formation, changing the reaction conditions relative to step 1) so as to form a linking covalent bond between the at least one initiator (I).
摘要:
Substrates comprising a functionalizable layer, a polymer layer comprising a plurality of micro-scale or nano-scale patterns, or combinations thereof, and a backing layer and the preparation thereof by using room-temperature UV nano-embossing processes are disclosed. The substrates can be prepared by a roll-to-roll continuous process. The substrates can be used as flow cells, nanofluidic or microfluidic devices for biological molecules analysis.
摘要:
The present invention relates to a new type of rapid initiation mechanism for the anionic, ring-opening polymerization of laurolactam by means of latent initiators based on thermally activatable N-heterocyclic carbene compounds, such as in particular N-heterocyclic carbene-CO 2 - or carbene-metal compounds (NHC). Thus, using the novel initiation mechanism it is possible to realise molecular weights (M w ) of from 2000 to more than 30 000 g/mol and narrow polydispersities. The polymerizations can be carried out either in bulk or in solution in a suitable solvent. Compounds of this type are thermally latent and initiate upon heating a polymerization to give polylaurolactam in high yields, as far as a quantitative conversion, whereas at room temperature a reaction does not take place. Polydispersity and molecular weight of the polylaurolactam can be adjusted through selection of the initiator and the reaction conditions.
摘要:
This invention relates to an etheramine of formula (I) based on glycerine or trimethylolpropane and its manufacturing process,
wherein R = H or ethyl, k = 0 or 1 A represents a linear or branched alkylene group having C 2 -C 18 carbon atoms, A may be the same as or different from one another, at least one A represents a linear or branched C 4 -alkylene group, the sum of x, y and z lies in the range of 3 to 100, x ≥1, y ≥1 and z ≥1, Z = NH2 or OH but at least two Z per molecule are NH2.