Plexiglas
Used for windows and lighting fixtures.
polyethylene
A tough, light, flexible thermoplastic used in the form of sheeting and film for packaging, damp-proofing, and as a vapor barrier.

polystyrene
A hard, tough, stable thermoplastic that is easily colored, molded, expanded, or rolled into sheeting.
vinyl
Any of various tough, flexible plastics made from polyvinyl resin.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved