题目内容

For addition polymerization, monomer units are attached one at a time in ______ fashion to form a linear molecule.

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Condensation polymerization involves ______ intermolecular chemical reactions that may include more than a single molecular species.

Fabrication of plastic polymers is usually accomplished by shaping the material in ______ form at an elevated temperature, using at least one of several different molding techniques—compression, transfer, injection and blow. Extrusion and casting are also possible.

Some fibers are ______ from a viscous melt or solution, after which they are plastically elongated during a drawing operation, which improves the mechanical strength.

Films are formed by extrusion and ______ or by calendering.