Open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead. Synonyms: ambiguous; equivocal. Context examples:
Polypropylene, also know as polypropene is a form of plastic just as polyethylene is. What separates polypropylene from polyethylene for starters is the fact that polypropylene can be molded in essence becoming pliable above a certain temperature. When it cools it will return to its solid state.
But while polyurethanes are made up of several different urethane compounds, there are many more differences between polyurethanes and urethanes. Although the main difference is the compounds (polyurethane is basically a chain of urethane organic compounds, and urethane has a main functional group of compounds). Acrylic urethane differs from polyurethane in several noteworthy ways. For one thing, polyurethane chips and stains less easily than acrylic urethane.