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Select the right hydrocarbon molecular weight correlation
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Understand how different techniques produce different results, and how that affects process simulation, design, and operation.
Computer models of systems processing wide-boiling-range hydrocarbon streams typically represent distillation fractions as pseudocomponents. In this method, commonly known bulk properties such as boiling point and specific gravity distributions are used in correlations to derive physical properties for petroleum fractions (pseudocompo nents). These derived characteristics represent the properties of a mixture that is not, or cannot, be characterized by its individual ...
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Low Molecular weight oils keep EPDM properties.(Technical)
; ...generally are from higher boiling point petroleum fractions obtained...fuel oil or similar lower boiling point materials have been removed...oil as the viscosity, molecular weight and molecular composition...range with minimum low molecular weight sulfur containing ...
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Effect of molecular weight on crystallization and melting of poly(trimethylene terephthalate). 1: Isothermal and dynamic crystallization.
; ...trimethylene terephthalate) as a function of molecular weight was investigated under isothermal...bulk crystallization increased with molecular weight. An Avrami analysis of the isothermal...constant increased with increasing molecular weight. The Avrami exponent, n, approached...
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Immobilized [Me.sub.2]Si([C.sub.5][Me.sub.4])(N-tBu)Ti[Cl.sub.2]/(nBuCp)[.sub.2]Zr[Cl.sub.2] hybrid metallocene catalyst system for the production of poly(ethylene-co-hexene) with pseudo-bimodal molecular weight and inverse comonomer distribution.(Author abstract)
; ...bimodal resin typically refers to a molecular weight distribution having two peaks at different...consists of two main fractions: a low molecular weight fraction affords a material with good...processibility and high rigidity, while a high molecular weight fraction brings a good ...
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Polymer with right molecular weight and distribution.
; ...polymer, which has a sufficiently high molecular weight to be used as an adhesive agent. Previously...from this process has the problems of low molecular weight and wide molecular weight distribution. This has led to problems...
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Determination of [beta]-glucan molecular weight using SEC with calcofluor detection in cereal extracts
; ...glucan for determination of amount and molecular weight of [beta]-glucan in different cereal...glucan was fractionated into narrow molecular weight ranges and the average molecular weight was determined before analysis on the...
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Ultrafiltered perfluoropolyether lubricant under molecular weight distributin control
; ...lubricity have a close relation to the molecular weight distribution. The commercial Perfluoropolyether...lubricant for magnetic disks, has a wide molecular weight distribution from several hundred...lubricity, it is necessary to control the molecular weight distribution. This paper ...
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Microencapsulation using polyactic acid. III. Effect of polymer molecular weight on the microcapsule properties
; ...core. Three polymers of different molecular weight were used to prepare different core...increased with increase in polymer molecular weight. Microcapsule size was also found...in core loading with the two high molecular weight polymers, whilst the low molecular...
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High Molecular Weight Poly(ethylene oxide)-Based Drug Delivery Systems: Part I: Hydrogels and Hydrophilic Matrix Systems
; ...are non-ionic, high molecular weight, water-soluble polymers...6^. Products with a molecular weight less than -25,000 are...depending on their molecular weight. all these grades find...slightly with increasing molecular weight from ~45 to ~53 . They...relationship near ...
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Shear field induced diffusion and molecular weight fractionation during polymer processing.
; ...the elastic strain energy for high molecular weight, viscoelastic polymers. It has been...gradient field to separate polymers by molecular weight (1). Furthermore, work by Lo and coworkers...unable to see any signs of radial molecular weight fractionation in polydisperse ...
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BIODEGRADATION - Degradation of poly(D,L-lactic acid) (PDLA) microspheres: affect of molecular weight
; ...microspheres during incubation were dependent on the molecular weight of raw polymers as shown by significantly different trends of time- dependent molecular weight change. The lower molecular weight polymeric microspheres exhibited a significant...
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