摘要:
Provided are a novel dispersant for suspension polymerization, and the like. The dispersion stabilizer for suspension polymerization includes a polyvinyl alcohol-based polymer (A) having an acetal skeleton having an ionic group.
摘要:
Provided are: a flame resistant polymer which is obtained by reacting polyacrylonitrile with amine and nitro compounds, the polyacrylonitrile being polymerized by aqueous suspension polymerization using a redox initiator and containing an S component at an amount of 3,000 µg/g or less; a polymer solution using the polymer; a flame resistant fiber using the polymer solution; a carbon fiber using the flame resistant fiber; and methods for producing the same. A PAN-based polymer in which both yarn producing properties and flame resistance are improved can be realized. Also provided are a polymer solution which is suitable for spinning using the polymer and a method for producing the same, a desirable flame resistant fiber using the polymer solution and a method for producing the same, and a desirable carbon fiber using the flame resistant fiber and a method for producing the same.
摘要:
Process for modifying a polymer comprising the steps of (a) mixing the polymer with a maleimide-functionalized mono-azide and/or a citraconimide-functionalized mono-azide at a temperature in the range 80-250°C to form a functionalized polymer, and (b) reacting the functionalized polymer with a substance containing one or more functional groups that can react with a maleimide or citraconimide functional group.
摘要:
A hybrid compound is provided that is formed by reaction between (a) an imidazolium-based ionic liquid functionalised with an alkyne group and (b) a polymer backbone comprising a plurality of azide functional groups, via an azide-alkyne cycloaddition reaction. The hybrid compound comprises a synthetic polymer backbone comprising at least one functional group X of general formula (I):
in which: R 1 to R 4 are each, independently, any chemical group, selected from H, halogen, a substituted or unsubstituted, branched or unbranched alkyl, alkenyl, cycloalkyl, aryl, acyl, heteroaryl, arylalkyl, heteroarylalkyl, aryloxy, alkyloxy, arylalkyloxy, aromatic polycycles, non-aromatic polycycles, mixed aryl and non-aryl polycycles, polyheteroaryl, non-aromatic polyheterocycles, mixed aryl and non-aryl polyheterocycles, and a pyridine group; L is a linker; and B ⊝ is an anion. An ion selective electrode (ISE) sensor of the type comprising an ion selective electrode and a reference electrode is also provided, wherein the ion selective electrode comprises a coating comprising a hybrid compound of the invention.
摘要:
The invention provides a dispersant viscosity modifier, and more specifically a metal free dispersant viscosity modifier. The invention provides compositions, including lubricating compositions containing the described dispersant viscosity modifier, such as heavy duty diesel lubricating compositions. The invention further relates to the use of the described dispersant viscosity modifier to improve the film thickness and/or antiwear performance of a lubricating composition, for example, a heavy duty diesel lubricating composition. The improved dispersant viscosity modifier of the invention is specially designed to protect against valve train and other crankcase wear in lubricating applications, including heavy soot conditions such as heavy duty diesel lubricating applications.
摘要:
There is provided a polyoxyalkylene-modified vinyl acetal polymer which has polyoxyalkylene groups represented by general formula (I) in side chain, in which a viscosity-average polymerization degree P is 150 to 5000, an acetalization degree is 10 to 85 mol% and a polyoxyalkylene modification rate S is 0.1 to 10 mol%. Such a polymer has a feature that a film or sheet produced therefrom has improved film strength and flexibility, as well as a feature that a resin composition therefrom is free from phase separation. wherein R 1 represents a hydrogen atom or a methyl group, R 2 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and 1‰¤m‰¤10 and 3‰¤n‰¤20.