Addition Polymers. Addition polymers such as polyethylene, polypropylene, poly(vinyl chloride), and polystyrene are linear or branched polymers with little or no cross-linking. As a result, they are thermoplastic materials, which flow easily when heated and can be molded into a variety of shapes.
According to what I have read a stalk of celery is the whole bunch....a rib, is one of the many that make up the stalk....so many of the recipes are really wrong when th â¦ ey say one stalk....you would have way too much celery.
Celery root, also known as celeriac (so elegant!) or celery knob (so crude!), is just what its name claims it to be: the root of the celery plant. This ugly brown hairball of a vegetable has a lovely mild, celery-like flavor with a starchy, rather potato-like texture. It's a surprising but winning combination.