ExxonMobil

About: ExxonMobil is a company organization based out in Irving, Texas, United States. It is known for research contribution in the topics: Catalysis & Polymer. The organization has 16969 authors who have published 23758 publications receiving 535713 citations. The organization is also known as: Exxon Mobil Corporation & Exxon Mobil Corp..

Wellbore method and apparatus for completion, production and injection

Abstract: Apparatus associated with the production of hydrocarbons comprising a joint assembly comprising a main body portion having primary and secondary fluid flow paths, wherein the main body portion is attached to a load sleeve assembly at one end and a torque sleeve assembly at the opposite end. The load sleeve may include at least one transport conduit and at least one packing conduit. The main body portion may include a sand control device, a packer, or other well tool for use in a downhole environment. Included is a coupling assembly having a manifold region in fluid flow communication with the second fluid flow path of the main body portion and facilitating the make-up of first and second joint assemblies with a single connection.

Correlation of Material and Processing Time Scales with Structure Development in Isotactic Polypropylene Crystallization

Abstract: The influence of average molar mass and shear on the crystallization of isotactic polypropylene (iPP) has been studied. The Weissenberg number, a dimensionless parameter consisting of the product of the shear rate and a characteristic relaxation time (γ0λr), provides a criterion to locate the morphological transition from spherulitic to extended growth. The Weissenberg criterion applies to polymers of high and of low molecular weight. This is attributed to the importance of the initial nucleation process. Comparison of materials of different molar masses and various shear histories is allowed by the introduction of the normalized crystallization time τ, which is the ratio of the experimental time and a characteristic crystallization time λVvmax that needs to be defined from the several possible choices. Rheological and rheooptical experiments furnish the material characteristic relaxation and crystallization time scales, respectively. The time λVvmax, defined with light scattering as the moment at maximu...

Self-diffusion of a molecule in porous Vycor glass.

Abstract: Mesure du coefficient d'autodiffusion d'une molecule de colorant (azobenzene) en solution, dans un verre vycor poreux par la technique de diffusion Rayleigh forcee

Small Angle X-Ray Scattering for Sub-100 nm Pattern Characterization

Abstract: Characterization of sub-100 nm photolithographic patterns with nanometer scale resolution is demonstrated using small angle x-ray scattering. The transmission scattering geometry employed potentially enables high throughput measurements for future technology nodes of the semiconductor industry, organic and inorganic nanoscale devices, and three-dimensional structures. The method is demonstrated through the characterization of a series of polymer photoresist gratings using a synchrotron x-ray source. Quantities, such as periodicity and line width, are extracted using minimal modeling. Additional quantities and the potential of a laboratory-based x-ray system are briefly discussed.