Examlex
Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of
summation.
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Polyurethane
A polymer composed of organic units joined by carbamate (urethane) links, used in foams, elastomers, and coatings.
Monomer Units
Small molecules that can be bonded together to form polymers.
Cationic Polymerization
A type of polymerization where a cationic initiator transfers charge to a monomer causing it to become reactive and link to other monomers.
Poly(acrylonitrile)
A synthetic polymer made by polymerizing acrylonitrile, used in the production of fibers, plastics, and rubbers due to its strength and thermal stability.
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