Abstract:
An improved system for energy transfer photopolymerization which optimizes the transfer efficiency of energy from a low energy light source to a higher energy donor and then to a polymerization initiator for the polymerization of a monomer material. The energy transfer efficiency is optimized by introducing stably miscible surface treated upconverting nanocrystal donors into a monomer matrix for near infrared to blue and ultraviolet upconversion and resonantly coupling the energy stored in the donor to the initiator via Förster Resonance Energy Transfer (FRET).
Abstract:
A friction-flow piercing apparatus for piercing very deep and fine holes is described, that relies on a novel support method for the piercing means. An apparatus for monitoring during the piercing process to determine the electrical properties gradient of the substrate is further described, particularly for meltable dielectric such as plastic industrial equipment. A permanently installed piercing means may function as a permanent test site.
Abstract:
A process for producing a partially balanced acid solution that involves metering dicarboxylic acid powder, based on weight, from a loss-in-weight feeder to a feeding conduit that transfers the dicarboxylic acid powder at a low variability feed rate into an in-line disperser, adding a first feed stream of diamine to the in-line disperser in an amount sufficient to form the partially balanced acid solution having a solids content of less than 60%, and storing the partially balanced acid solution at a temperature to maintain the dissolved dicarboxylic acid and to prevent formation of a slurry. The partially balanced acid solution may be used as a feed solution to prepare a nylon salt solution. Process controls for the process are also disclosed.
Abstract:
A method of monitoring the evolution of polymer and/or colloid stimuli responsiveness during synthesis of polymers and/or colloids, including postpolymerization modifications on natural and synthetic polymers, includes providing a reactor in which the polymers and/or colloids are synthesized; and providing a means of monitoring the stimuli responsiveness of the polymers and/or colloids during said synthesis. Preferably, the method also includes monitoring the evolution of the characteristics of the polymers and/or colloids during said synthesis. Preferably, evolution of polymer and/or colloid stimuli responsiveness is correlated to the evolution of the properties of the polymers and/or colloids themselves. Also, preferably the conditions of the fluid in the reactor in which the synthesis occurs is determined. The determination can be by detection, choice of materials and temperature conditions, for example, and combinations thereof. The method and instrumentation disclosed can lead to optimization and control of processes and synthetic and modification strategies leading to polymers and colloids with desired stimuli responsiveness.
Abstract:
Test liquid (3) including thermosetting resin is injected from an injection valve (2). Light (L) is irradiated to a spray (6) of the test liquid (3) injected from the injection valve (2) as a treatment for producing a hardening effect to the thermosetting resin. Liquid drops in the spray (6) are hardened and collected as particles. Spray characteristics such as a particle size distribution of the injection valve or the like are analyzed by using the collected particles.
Abstract:
The present application relates to a method and system for optimizing a composite system by electrically monitoring the reactive and physiological behavior of the resin binder in a composite system, so as to develop the desired properties of the resin during the cure process. A method of manufacturing a composite part can include assembling a composite preform with a resinous material and an open circuit. Further, the method can include subjecting the composite preform to a curing cycle so that a resin in the resinous material melts and closes the open circuit. Further, the method can include electrically monitoring a current through the resin during the curing cycle. Further, the method can include selectively controlling a manufacturing variable in response to the step of electrically monitoring the current through the resin.
Abstract:
The present invention is directed to methods of measuring the degree of cure or solidification of a composition. Desirably, such methods are quantitative and ascertain the degree of cure or solidification in a non-destructive manner such that they are adaptable for on-line, real-time monitoring.
Abstract:
A method for simulating a rubber material comprises a step of setting a rubber material model modeled on a rubber material including rubber, silica, and an interface bonding agent to bond them with numerically analyzable elements; a step of calculating deformation by setting conditions in the rubber material model; and a step of acquiring needed physical quantity from the deformation calculation. The rubber material model (2) comprises a matrix model (3) modeled on a rubber matrix, a plural of silica models (4) modeled on the silica arranged in said matrix model (3), and an interface model (5) surrounding annularly each of the silica models (4) and having a harder physical property than the matrix model. The rubber material model comprises a coupled body formed by coupling a plural of the silica models (4) via the interface model (5).
Abstract:
The present invention provides materials, devices, and methods related to determination of an analyte. In some embodiments, an analyte may be determined by monitoring, for example, a change in an optical signal of a luminescent material (e.g., particle) upon exposure to an analyte. The present invention may be particularly advantageous in that some embodiments may comprise an emissive species useful as an internal reference standard. Methods of the invention may also be useful in the quantitative determination of an analyte. In some cases, the present invention may allow for selective determination of an analyte.
Abstract:
Improved methods of detecting thermal exposure are provided herein. The provided methods utilize initially dormant luminescent probes incorporated into a matrix to form a composite. When exposed to heat over a period of time, the luminescent probes are “activated” through a molecular transformation initiated by thermal energy. The activated probes exhibit a luminescent profile based on the extent of thermal exposure, thereby providing an indicator of the thermal exposure experienced by the matrix. When the composite is used to produce a structural component of a vehicle (e.g., an aircraft), the methods provide a convenient, large-area indicator of thermal damage experienced by the structural component.