摘要:
The invention provides a composition including a crosslinked styrenic block copolymer, a poly(arylene ether), and a non-polyolefin crystalline or semi-crystalline resin. The composition exhibits an improved balance of stiffness, ductility, and heat resistance. The composition can be prepared by a process that includes melt-kneading the poly(arylene ether), an acid functionalized styrenic block copolymer, an amine crosslinking agent, and a non-polyolefin crystalline or semi-crystalline resin.
摘要:
A composition includes at least 15 weight percent of a low intrinsic viscosity, bifunctional poly(arylene ether) and at least 20 weight percent of a nonhalogenated solvent. The bifunctional poly(arylene ether)s are substantially and unexpectedly more soluble than their monofunctional analogs. The compositions are useful as concentrates to add bifunctional poly(arylene ether)s to thermosets.
摘要:
A method for producing a capped poly(arylene ether) having a low concentration of metal impurities is described. The method includes treating a solution of a capped poly(arylene ether) with a chelant to bind the polymerization catalyst metal, and separating the chelated metal from the capped poly(arylene ether). Capped poly(arylene ether)s prepared by the method are also described, as are curable compositions that include them.
摘要:
A crosslinked block copolymer concentrate includes at least 80 weight percent of a crosslinked block copolymer of an alkenyl aromatic monomer, such as styrene, and a conjugated diene, such as butadiene. The crosslinked block copolymer includes 50 to about 90 weight percent of repeating units derived from the alkenyl aromatic monomer. The concentrate may be blended with a poly(arylene ether) to form a composition with high ductility. Blends of the concentrate and poly(arylene ether) may also be formulated to be translucent or transparent.
摘要:
A cured composition is prepared by curing a curable composition including an epoxy resin and a bifunctional poly(arylene ether) having an intrinsic viscosity of about 0.03 to about 0.2 deciliter per gram. The cured composition exhibits markedly improved impact strength relative to a corresponding composition prepared from monofunctional poly(arylene ether).
摘要:
A composition includes a poly(arylene ether) and a radial block copolymer having particular properties. The composition exhibits an improved balance of ductility and optical clarity, making it useful in packaging applications, among others.
摘要:
A poly(arylene ether) may be fractionated into higher and lower molecular weight fractions by forming a mixture that includes a poly(arylene ether) starting material, a first solvent that is dichloromethane, bromochloromethane, dibromomethane, or a mixture thereof, and a second solvent different from the first solvent having a Hildebrand solubility parameter of about 16 to about 22 megapascal1/2. The mixture separates into fractions containing higher and lower molecular weight poly(arylene ether)s.
摘要:
A method is disclosed to prepare a polymeric material by filtering solutions of poly(arylene ether) and/or poly(alkenyl aromatic) through one or more filtration systems to provide a material having reduced levels of particulate impurities. The polymeric material prepared is suitable for use in data storage media applications.
摘要:
A polymer blend may be prepared by melt kneading a composition that includes a poly(arylene ether), a polystyrene, and a carboxylic acid concentrate including a carboxylic acid compound and a polymer resin having a glass transition temperature or a melting temperature of about 30 to about 175° C. Using the carboxylic acid concentrate reduces the concentrations of styrene monomer and toluene in the polymer blend.
摘要:
A thermoset composition exhibiting reduced water absorption in the cured state includes an olefinically unsaturated monomer and a capped poly(arylene ether) prepared by the reaction of an uncapped poly(arylene ether) with an anhydride capping agent. The capped poly(arylene ether) is isolated and/or purified by methods that reduce the concentrations of polar impurities that contribute to water absorption by the cured composition.