Abstract:
Described here are polyphenylene sulfide ("PPS") polymers having significantly improved processability. It was surprisingly found that PPS polymers, terminated with specific end-capping agents in specific amounts, had significantly improved melt stability. Because of the significantly improved melt stability, the PPS polymers can be advantageously incorporated into melt processing techniques.
Abstract:
A method for forming a polyarylene sulfide is provided. The method comprises supplying a waste composition to a vessel, the waste composition containing arylene sulfide byproducts, such as an arylene sulfide oligomer, cyclic polyarylene sulfide, and/or fine polyarylene sulfide particles. The arylene sulfide byproducts are heated to a temperature of from about 260C to about 285C in the presence of a sulfur reactant, thereby forming a high molecular weight polyarylene sulfide having a number average molecular weight of about 2,000 Daltons or more.
Abstract:
A sulfur-containing polyarylene resin and a process for its production are disclosed. The crosslinked polyarylene resin is a polyarylene resin containing sulfur atoms in the main chain, which has a degree of crosslinking of the aryl groups of 5 % or more and a high heat resistance. The process comprises heating a sulfur-containing polyarylene resin in contact with at least one metal compound selected from among iron, chromium and cobalt compounds.
Abstract:
A rubber composition comprising a plurality of composite particles and an elastomer is provided. A composite comprising a conductive polymer and a clay particle are also provided. Use of each in various applications and methods of preparing each are also provided.
Abstract:
A process for producing a poly(arylene sulfide) polymer comprising (a) polymerizing reactants in a reaction vessel to produce a poly(arylene sulfide) reaction mixture, (b) processing at least a portion of the poly(arylene sulfide) reaction mixture to obtain a poly(arylene sulfide) reaction mixture downstream product, and (c) contacting a reactive aryl halide with at least a portion of the poly(arylene sulfide) reaction mixture and/or downstream product thereof, wherein before and/or after the contacting, the poly(arylene sulfide) reaction mixture and/or downstream product thereof comprise less than about 0.025 wt.% thiophenol, based on the total weight of the poly(arylene sulfide) reaction mixture and/or downstream product thereof.
Abstract:
The present invention relates to a method for separating volatile substances, particularly iodine, diiodised aromatic compounds and/or mixtures thereof, from material mixtures containing said compounds. The invention further relates to a device for producing polyarylene sulphides, by means of which volatile substances, particularly iodine and diiodised aromatic compounds, can be separated from the polymers.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Abtrennung von flüchtigen Substanzen, insbesondere lod, diiodierten aromatischen Verbindungen und/oder Gemischen hieraus aus Stoffgemischen, die diese Verbindungen enthalten. Zudem betrifft die vorliegende Erfindung eine Vorrichtung zur Herstellung von Polyarylensulfiden, mit Hilfe derer flüchtige Substanzen, insbesondere lod sowie diiodierte aromatische Verbindungen, aus den Polymerisaten abgetrennt werden können.
Abstract:
The present invention relates to a polyarylene sulfide that is prepared from a composition including 100 parts by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur, and has a melting temperature (Tm) of 255 to 285 °C, and luminosity of 40 or higher as defined by the CIE Lab color model, and a process of preparing the same. The PAS resin is prepared from a composition including a sulfur-containing polymerization terminator and thus has excellent thermal properties and luminosity.