Chlorinated polyvinyl chloride CPVC is a thermoplastic produced by chlorination of polyvinyl chloride PVC resin , which is significantly more flexible and can withstand higher temperatures than standard PVC.
Uses include hot and cold water delivery pipes and industrial liquid handling.
CPVC, as PVC, is deemed safe for the transport and use of potable water, potable meaning water used for drinking, cooking, and bathing. Genova Products located in Michigan initially created the first CPVC tubing and fittings for hot- and cold-water distribution systems in the early s.
This reaction is typically initiated by application of thermal or UV energy utilizing various approaches.
In the process, chlorine gas is decomposed into free radical chlorine which is then reacted with PVC in a post-production step, essentially replacing a portion of the hydrogen in the PVC with chlorine. Depending on the method, a varying amount of chlorine is introduced into the polymer allowing for a measured way to fine-tune the final properties.
The chlorine content may vary from manufacturer to manufacturer; the base can be as low as PVC Various additives are also introduced into the resin in order to make the material more receptive to processing. These additives may consist of stabilizers, impact modifiers, pigments and lubricants.
What is PVC?
CPVC is readily workable, including machining, welding, and forming. The ability to bend, shape, and weld CPVC enables its use in a wide variety of processes and applications.
It exhibits fire-retardant properties. Additionally, the mechanical strength of CPVC makes it a viable candidate to replace many types of metal pipe in conditions where metal's susceptibility to corrosion limits its use.
Additionally, CPVC is a thermoplastic and as such has greater insulation than that of copper pipes. Due to this increased insulation, CPVC experiences less condensation formation and better maintains water temperature for both hot and cold applications.
It is typically very difficult to ignite and tends to self-extinguish when not in a directly applied flame.
Due to its chlorine content, the incineration of CPVC, either in a fire or in an industrial disposal process, can result in the creation of chlorinated dioxins and the similarly dangerous polychlorinated dibenzofurans , both which bioaccumulate. From Wikipedia, the free encyclopedia. Chlorinated polyvinyl chloride Names Other names Polychloroethylene.
CAS Number. Chemical formula.
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Elementary Principles of Chemical Processes. Categories : Vinyl polymers Plastics.
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