Which of the following groups of polymers can be recycled? Explain your answer.A. Ziegler-Natta catalysed polymerB. Thermoplastic polymerC. Thermosetting polymerAnswer can be more than one.
Thermoplastics are easy to recycle since they can be melted and reshaped into other products. These types of polymers are formed by reorientation of labile bonds, e.g. a pi-bond. Ziegler-Natta catalyzed polymers are poly α-olefins. Being thermoplastic in nature these types of polymers are also easily recyclable. Thermosetting polymers, on the other hand, undergo a chemical change when they are heated, creating a three-dimensional network and associated with the loss of a small molecule with the progress of polymerization. After they are heated and formed, these molecules cannot be re-heated and re-formed. Recycling of these polymers is nearly impossible. Hence the answer is both A and B here.