摘要:
The polymerization of acetylene in the presence of polymers using certain nickel catalysts results in polyacetylene-containing polymer products which are readily processed while retaining their electrical properties.
摘要:
A reinforced acetylene high polymer shaped article is provided, which is comprised of an acetylene high polymer and 10 to 500 wt. parts, per 100 wt. parts of the acetylene high polymer, of a sheet-form product of a fibrous material. The reinforced acetylene high polymer shaped article is prepared by polymerizing acetylene in the presence of the sheet-form product coated or impregnated with a catalyst solution, or by superposing the acetylene high polymer upon the sheet-form product and then pressing or calendering the superposed assembly. The reinforced acetylene high polymer shaped article is useful particularly as an electrode of a battery.
摘要:
Conjugated backbone polymers (e.g., polyacetylene), especially formed into a battery electrode, are contacted with a compound MR where M is an alkali metal and R is alkyl of 1-12 carbons, phenyl or alkylphenyl of 7-12 carbons. The method is particularly suited to treatment of battery electrodes to avoid a high initial internal resistance.
摘要:
Electrically conductive polymer blends of an acetylene polymer, such as poly(acetylene), and a triblock thermoplastic elastomer, such as styrene-butadiene-styrene, are disclosed. In addition, a method for preparing such blends wherein the acetylene polymer is preferentially formed in the central elastomeric block of the triblock copolymer is disclosed. These blends exhibit high conductivity and elasticity upon doping with electron donors or electron acceptors.
摘要:
Electrically conductive polymer blends of an acetylene polymer and an elastomer having a low level of unsaturation are disclosed herein. The low level of unsaturation provides resistance to heat, light, oxygen and ozone and yet provides sufficient sites for crosslinking of the blend to provide increased stability. These blends exhibit high conductivity upon doping with electron donors or electron acceptors.
摘要:
Batteries are disclosed with electrodes, especially cathodes, having a conjugated backbone polymer such as polyacetylene as electroactive material and a coating. The coating is formed by reaction between the oxidized polymer and a pyrrole, thiophene, azulene, furan or aniline compound.
摘要:
A modifier system for extruding PVC foam comprising two separate core-shell polymers, the shells of which are substantially ungrafted to the cores. Also disclosed is an improved process for extruding PVC foam and improved extruded PVC foam composition and articles.
摘要:
The new composition 4,4'-bis(3-ethynylphenoxy)diphenylsulfone is prepared by the nucleophilic displacement reaction of m-hydroxyphenyl acetylene with various disubstituted diphenylsulfones. The composition is useful as a composite resin and also as a reactive plasticizer for polysulfone thermoplastic resins. A reactive plasticizer is a material that remains fluid and acts as a plasticizer during early stages of fabrication and then polymerizes to a rigid resin.
摘要:
The invention relates to poly (arylacetylenes) which have been modified by oxidation to introduce carboxyl functionality into the polymer molecule. Representative of the poly (arylacetylenes) is the polymer prepared by aromatization of diethynylbenzene. The carboxylated polymers produced from these poly (arylacetylenes) are useful as coupling agents to improve the adhesion of the parent polymers to metal surfaces and inorganic substrates.
摘要:
When a hot, homogeneous solution containing at least 4 percent by weight of a copolymer of a diethynylbenzene and a dipropargyl ether of a dihydric phenol in nitrobenzene or a liquid halobenzene solvent is allowed to cool in contact with a shaping surface, a shaped gel is formed. Contacting the shaped article with a lower alkyl ketone which is a nonsolvent for the acetylenic polymer but in which the halobenzene is soluble and then allowing the shaped object to dry causes the gel to shrink isotropically so that it retains the shape, although diminished in size, which it assumed on solidifying. If the halobenzene solvent is crystalline at room temperature, the solvent crystallizes in the polymer matrix as it cools. Extraction with a lower alkyl ketone or sublimation of the solvent crystals produces a shaped article having a microporous structure. The shaped articles are readily converted by heating in an inert atmosphere to the same shaped carbon articles which can be amorphous, vitreous or graphitic depending on the heating schedule and the maximum temperature to which the articles are heated.