= polystyrene, n.

any of a number of polymers which are prepared from formaldehyde and in which the repeating unit is the group —CH2·O—; esp. any of the tough, strong…

A polymer of styrene, esp. a hard thermoplastic resin; (also) any of various plastics made from or containing this, widely used as lightweight…

Chemistry. In the names of substances which are polymers of compounds containing a vinyl group —CH=CH2. any of various thermoplastic polymers in…

any of a class of polymers containing the repeating group —(O·CHR)—, which are prepared by addition polymerization of aldehydes and are typically…

= polyoxymethylene n.

A polymer of propylene; esp. any of a number of durable thermoplastic propylene polymers widely used in films, fibres, fabrics, and moulded plastic…

polyvinyl chloride.

A polyacrylic fibre; a material made from such fibres.

A phenoxy plastic or other substance containing phenoxy groups.

any of a class of crystalline thermoplastics which are copolymers of two or more different alkenes, esp. ethylene and propylene.

Any of a class of synthetic polymers that contain a significant proportion of ionic groups, used to make films, coatings, and moulded products.

Any of several transparent thermoplastic polymers of paraxylene or its substituted derivatives that are obtained as thin films or particles by…

Polypropylene, esp. as a textile fibre.