Abstract: This application provides a resource indication method and apparatus, and relates to the field of communication technologies. In the method, the first communication apparatus may receive resource indication information. The resource indication information may include resource unit allocation information for indicating one or more first VRUs, and station information of a station to which the one or more first VRUs are allocated. There is a mapping relationship between the first PRU and the first VRU. The first communication apparatus transmits data on the first PRU.

Abstract: A gas separation membrane comprises aromatic polyimide polymers that comprise a plurality of repeating units of formula (I) wherein X1 and Ar are herein defined.

Abstract: A gas separation membrane comprises aromatic polyimide polymers that comprise a plurality of repeating units of formula (I) wherein X1 and Ar are herein defined.

Abstract: A polyethylene terephthalate injection molding composition includes: (a) from about 30 to about 70 weight percent of a polyethylene terephthalate matrix resin; (b) from about 3 to about 60 weight percent of a component selected from reinforcing agents, mineral fillers and mixtures thereof; (c) from 0 to about 25 weight percent of a polymeric impact modifier; (d) a nucleating agent selected from sodium and potassium salts of hydrocarbon carboxylic acids having from 20 to 35 carbon atoms; (e) a plasticizer selected from ethylene glycol esters of hydrocarbon carboxylic acids having from 6 to 35 carbon atoms; and optionally including lubricants, anti-oxidants, pigments, UV-stabilizers, mold release agents and mixtures thereof. The compositions exhibit superior surface when molded into parts, especially surface gloss.

Abstract: Stabilized polyester compositions comprising: (A) a thermoplastic polyester; (B) antimony trioxide; and (C) a thiobisphenol phosphite comprising at least one stearically hindered tris[(hydroxyphenylthio)phenyl]phosphite.

Abstract: Stabilized polyester compositions comprising:

Abstract: Applications of barrier coating mixtures containing in a carrier liquid, (a) an elastomeric (preferably butyl-containing) polymer; (b) a dispersed exfoliated layered filler having an aspect ratio greater than 25; and (c) at least one surfactant, wherein the solids content of the mixture is less than 30% and the ratio of polymer (a) to filler (b) is between 20:1 and 1:1 include coated articles, which are elastomeric, e.g., sports balls and inflatable articles. Methods of manufacturing such coated products are also encompassed.

Abstract: Barrier coating mixtures contain in a carrier liquid, (a) an elastomeric (preferably butyl-containing) polymer; (b) a dispersed exfoliated layered filler having an aspect ratio greater than 25; and (c) at least one surfactant, wherein the solids content of the mixture is less than 30% and the ratio of polymer (a) to filler (b) is between 20:1 and 1:1. Coated articles, which are rigid or flexible and elastomeric, and free-standing films and membranes, which are flexible and elastomeric, are produced using the barrier coating mixtures.

Abstract: An acrylic modifier composition for improving impact resistance of polyester compositions is provided which comprises (a) between about 10% to about 90% by weight of a first component selected from the group consisting of an ethylene alkyl acrylate co-polymer and ethylene alkyl methacrylate copolymer, wherein the alkyl is C1 to C10; and (b) between about 10% to about 90% by weight of a second component selected from the terpolymer group consisting of ethylene/alkylacrylate/ glycidyl methacrylate; ethylene/alkyl acrylate/glycidyl acrylate; ethylene/alkyl methacrylate/glycidyl acrylate; and ethylene/alkyl methacrylate/glycidyl methacrylate, wherein the alkyl is C1 to C10. Polyester compositions toughened by addition of the modifier composition are disclosed, as are articles molded from these compositions and processes for forming these polyester compositions.

Abstract: A highly filled, ceramic-like thermoplastic polyester resin molding composition, characterized as containing a polyethylene terephthalate base resin, an impact modifier system containing a copolymer and terpolymer, glass fibers, and a mineral filler. Shaped articles prepared from the molding composition exhibit a ceramic appearance and feel, glossy surface finish, improved impact strength, and high specific gravity.

Abstract: Described herein is a novel process to resolve a racemic compound into its optically active isomers without need for chemical transformation such as salt formation. The process advantageously utilizes polymers containing chiral moieties in their repeat units as well as exhibiting critical solution temperature behavior in a suitable solvent. An embodiment describes the resolution of tryptophan.

Abstract: Described herein is a novel process to resolve a racemic compound into its optically active isomers without need for chemical transformation such as salt formation. The process advantageously utilizes polymers containing chiral moieties in their repeat units as well as exhibiting critical solution temperature behavior in a suitable solvent. An embodiment describes the resolution of tryptophan.