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N-Vinylpyrrolidone (NVP) is an organic compound consisting of a 5-membered lactam ring linked to a (2 carbon) vinyl group. It is a colorless liquid although commercial samples can appear yellowish. It is produced industrially by vinylation of 2-pyrrolidone, i.e. the base-catalyzed reaction with acetylene. [2]
Homeowners across the country are finding the vinyl siding melting and warping on their homes, but there is a solution.
Vinyl siding is plastic exterior siding for houses and small apartment buildings, used for decoration and weatherproofing, imitating wood clapboard, batten board and batten or shakes, and used instead of other materials such as aluminum or fiber cement siding.
In chemistry, chromism is a process that induces a change, often reversible, in the colors of compounds.In most cases, chromism is based on a change in the electron states of molecules, especially the π- or d-electron state, so this phenomenon is induced by various external stimuli which can alter the electron density of substances.
Styrene is an organic compound with the chemical formula C 6 H 5 CH=CH 2. Its structure consists of a vinyl group as substituent on benzene. Styrene is a colorless, oily liquid, although aged samples can appear yellowish. The compound evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor.
The vinyl sulfone parabase ester can be used as a diazo component in the preparation of azo dyes. [1] A further possibility is the condensation reaction of parabase ester with a chlorine or fluorotriazine residue, which in turn can be linked to any chromophore via a further amino group. Vinyl sulfone parabase ester
The improved process control and reaction heat removal lead to increase in molecular weight, rate of reaction and yield. Fluorinated surfactants such as perfluorinated carboxylic acids maintain a high rate of reaction even after 40% conversion , they are thermally and chemically stable and their incorporation does not impair PVF properties.
Vinylsulfonic acid is the organosulfur compound with the chemical formula CH 2 =CHSO 3 H. It is the simplest unsaturated sulfonic acid. [2] [3] The C=C double bond is a site of high reactivity. Polymerization gives polyvinylsulfonic acid, especially when used as a comonomer with functionalized vinyl [4] and (meth)acrylic acid compounds. [5]