Abstract:
The present invention provides a 3D porous structure of parylene including a poly-p-xylylenes structure having a plurality of pores. The poly-p-xylylenes structure has a porosity. According to an embodiment of the present invention, the size of the porous structure is between 20 nm and 5 cm. According to an embodiment of the present invention, the porosity is between 55% and 85%. According to an embodiment of the present invention, the porous structure further includes a plurality of target molecules. According to an embodiment of the present invention, the pores of the poly-p-xylylenes structure include pore sizes of different sizes. The pore sizes are varying in a gradient. According to an embodiment of the present invention, the porous structure is formed integrally.
Abstract:
The present invention relates to melamine-formaldehyde foams comprising hollow microspheres wherein said hollow microspheres have a median particle diameter (D 50 , volume averaged, Malvern, Fraunhofer diffraction) in the range from 260 µm to 490 µm, and also processes for producing these melamine-formaldehyde foams and their uses.
Abstract:
An optically clear, porous polymer composition, an article incorporating the composition, and methods for making and using the composition for cell culture including, for example, regulating or promoting cell function or gene expression as defined herein.
Abstract:
A porous biaxially oriented film comprising an ethylene/a-olefin copolymer wherein the copolymer is obtained by copolymerising an ethylene and an a-olefin having 4 to 8 carbon atoms, wherein the a-olefin is present in an amount of from 1.0 to 7.5 per 100 carbon atoms of the copolymer and the intrinsic viscosity [η] of the copolymer is from 3.5 to 10.0 dl/g ; wherein (i) the film has a microporous structure in which microfibrils of the ethylene/a-olefin copolymer are uniformly dispersed ; (ii) when cooled to room temperature after heat-treatment at 160°C in a constrained state the film loses its air permeating property due to the loss of porosity but still retains the structure which is based on the microfibrils ; (ii) at a temperature of not less than 170°C the film breaks up after having lost the gas permeating property.
Abstract:
The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(phenylene sulfide) polymer by forming a mixture of an unsulfonated poly(phenylene sulfide) polymer, a crystallizable polymer, and optional plasticizer, heating the resulting mixture, extruding or optionally casting the mixture into a membrane, controlled cooling (quenching) or coagulating the membrane, and leaching the membrane, while optionally drawing the membrane before, during, and/or after leaching.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved preparation technology of a macroreticular polymer. SOLUTION: The method for preparing the macroreticular polymer comprises polymerizing one or more monoethylenically unsaturated monomers in the presence of a silicone-based porogen. In the method for preparing the polymer, it is preferable to use styrene and divinylbenzene crosslinking agent by a suspension polymerization method. A method for producing an ion exchange resin comprises functionalizing the macroreticular polymer prepared. COPYRIGHT: (C)2004,JPO