摘要:
A grid structure and method for manufacturing the same. The grid is used for gating a stream of charged particles in certain types of particle measurement instruments, such as ion mobility spectrometers and the like. The methods include various microfabrication techniques for etching and/or depositing grid structure materials on a silicon substrate.
摘要:
A method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase. More specifically, a method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase, wherein the organic phase is a hydrocarbon solution of the monomer or a halogenated-hydrocarbon solution of the monomer and wherein the neat-monomer reaction phase is a liquid monomer.
摘要:
The present invention provides a tethered bridged metallocene compound in which the tether typically comprises a segment of the formula —(R2)d—(CH2CH2)e(CH═CH)f wherein R2 is an alkylene or phenylene group, and d, e and f are 1 or 0. One end of the tether reacts with a silane bridged metallocene compound and the other reacts with the support. The activated metallocene compound is capable of producing a polymer having a narrow molecular weight distribution.
摘要:
A dispenser having a faceplate that can be removed and attached to the housing of the dispenser without the use of tools. The dispenser may have a track system. The track system may be positioned in or removed from the dispenser without the use of any tools. The dispenser, including the housing and/or the track system, may be curved. The faceplate may be angled away from the surface upon which the dispenser is positioned. The faceplate may also be curved away from the housing to form an interior surface in the faceplate. The interior may have features for desired dispensing characteristics.
摘要:
A grid structure and method for manufacturing the same. The grid is used for gating a stream of charged particles in certain types of particle measurement instruments, such as ion mobility spectrometers and the like. The methods include various microfabrication techniques for etching and/or depositing grid structure materials on a silicon substrate.