polymart

4. Biodegradable plastics are designed to break down through the action of __________.
5. Plastics are primarily made from __________ obtained from crude oil and natural gas.
10. Carbon black is added to rubber mainly to improve its __________ resistance.
11. Rubber becomes stronger and more elastic through a process called __________.
13. PVC stands for Polyvinyl __________.
14. Natural rubber is primarily obtained from the latex of the __________ tree.

1. The process used to manufacture plastic pipes is called __________.
2. Nylon belongs to the family of polymers known as __________.
3. High-Density Polyethylene (HDPE) has a __________ density than LDPE.
6. Thermosetting plastics cannot be reshaped after __________.
7. Thermoplastics can be melted and reshaped because they __________ on heating.
8. PET is widely used for manufacturing __________ bottles.
9. The basic repeating unit of a polymer is known as a __________.
12. Blow molding is mainly used for producing hollow plastic __________.