摘要:
Compounds useful for associating with nanoparticle or microparticle emulsions to obtain magnetic resonance images permit control of the relaxivity of the signal and readily associate with the particulate components.
摘要:
Core-shell tecto(dendrimers) useful in biomedicine, pharmaceuticals, personal care products, and in other ways analogous to the known uses for dendrimers, hypercomb branched polymers, and other dendritic polymers are the reaction product of a core dendritic polymer molecule having a plurality of terminal functional groups of a first type which are not reactive with each other, and a plurality of shell dendritic polymer molecules having a plurality of terminal functional groups of a second type which are not reactive with each other, but which are reactive with the terminal functional groups of the first type. Each of the shell dendritic polymer molecules is chemically bonded to the core dendritic polymer molecule by a reaction of at least one of the terminal functional groups of the second type with at least one of the terminal functional groups of the first type.
摘要:
A process for preparing a polymer or copolymer from polymerizable monomers by suspension polymerization whereby foam formation during the removal of residual monomers is inhibited, which process comprises adding at least one salt of an inorganic acid having an anionic valency of at least 2 to the polymer slurry prior to the removal of the residual monomer.
摘要:
A system and method for integrating a business transaction processing system (102) with a process control system (110) provides a computer integrated manufacturing environment. The manufacturing execution system receives work orders from the business transaction processing system and obtains enrichment data to enhance the work order. The manufacturing execution system uses the enrichment data and rules contained in a plant model database to generate setpoints based on the received work orders. The set points include detailed information required by the process control system to manufacture the product specified by the work order. The setpoints are transmitted to the process control system for manufacture of the required materials.
摘要:
A continuous process for preparing polybenzazole staple fibers which comprises supplying polybenzazole polymer through an extruder (1) to a spinning head (2) for spinning, passing the filaments through a quench chamber (3), around rollers (4) and through a cutting device (5) which cuts the filaments into staple fibers.
摘要:
Disclosed is a foam structure of desirable mechanical strenght made with a low molecular weight alkenyl aromatic polymer material and an inorganic blowing agent. The polymer material has an alkenyl aromatic polymer of a weight average molecular weight of 100,000 to 165,000. The foam structure can be made in processes with reduced pressure drop.
摘要:
An analytical method for analysis of precipitation of a soluble sample comprises the steps of: (a) providing a sample (14) in solution (24); (b) precipitating (30) the sample from the solution while intermittently measuring (36) the concentration of sample remaining in the solution; and (c) based on the results of step (b) calculating the composition distribution (44) of the sample.