摘要:
An improved process for crosslinking a polyolefin polymer is described. The process involves grafting a silane material onto the polyolefin based polymer in the presence of a free radical generating initiator material and then hydrolyzing the silane material to form crosslinks. By using an effective molar ratio of silane material to free radical of 40 or greater in the grafting reaction, premature crosslinking is controlled and the grafted polymer can be shaped first and then crosslinked. In another aspect of the invention, the crosslinking process is improved by adding a catalyst for the hydrolysis catalyst to the surface of a shaped article made from the grafted polymer. Grafted polymer and articles made from the grafted polymer, particularly fibers, are also disclosed.
摘要:
The present invention is a stable organic free radical polymer system. The system is useful as a composition, provides processing advantages over existing grafting technologies, and imparts unique properties to articles of manufacture made therefrom.
摘要:
The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
摘要:
A polymer comprises a repeating unit of ethylene and vinyl alcohol, characterized by a linear backbone with substantial absence of branching on the backbone. The polymer has a steady state oxygen permeability coefficient substantially independent of the humidity. In addition, a polymer comprises a repeating unit of ethylene and vinyl acetate, characterized by a linear backbone with substantial absence of branching on the backbone and a plurality of acetate groups bonded to the backbone. Some polymers comprise vinyl alcohol or acetate groups that arm separated by x-2, x-1 or x carbon atoms, and such groups are present in a ratio of 1:2:1, wherein x ranges integrally from 3 to 12.
摘要:
A microwave imaging system provides superior breast imaging resolution by combining MR microwave absorption and MR-compatible microwave tomography calculations. These techniques may also be supplemented with magnetic resonance elastography calculations, for example, to facilitate quick multispectral imaging.
摘要:
The present invention is directed toward a technique for the identification of operational entities in unstructured text. The technique consists of the preparation of a series of dictionaries, combining these dictionaries into a single Negative Element Dictionary, then searching an unstructured file for terms matching those in the Negative Element Dictionary. Each term present in the unstructured file but not present in the Negative Element Dictionary is considered an operational entity.
摘要:
A portable device, such as a pager-type device or card module, generates and guides a user through a customized smoking cessation plan. The device calculates intervals between smoking events (when the user is allowed to smoke) based on user input information and the day in the plan. The intervals increase as the plan progresses. The device alerts the user when a smoking event occurs. The user may place the device in a silent mode during periods when smoking would be inconvenient.
摘要:
A head-up display for use in an automotive or other vehicle having limited space. The optical path from display symbol generator to a collimating lens is folded to fit in a relatively compact housing. Also shown is the use of the automobile windshield as a combiner glass for the display. Corrective lenses, and in particular crossed linear fresnel lenses, are used to correct for the astigmatism introduced by the geometry of the windshield. This provides a combination of optical powers for the display lens and the windshield which has the resultant effect of projecting an image from the image source to the driver's eye. The source is a high light output array of light-emitting diodes. A microprocessor based controller for detecting the status of inputs from the automobile is shown. Data is periodically loaded into a random access memory dedicated to controlling the display. When data is not being loaded, a separate address and timing generator is used to cause data from this memory to be displayed in a free-running mode.