| A | B |
|---|
| Synthetic | not occurring in nature- man-made |
| Crystallinity | property of polymers where areas of regularity called crystallites exist. This results in a stronger and more opaque material |
| Amorphous | substance whose molecules have no definite order |
| Polymerization | process of putting smaller repeating units called mers together to form long molecules |
| Addition | rapid chain reaction where molecular units are added to one anther-usually by breaking double bonds |
| Condensation | forming molecules between two different types of mers |
| Set | to form a solid by curing |
| Thermoset | type of polymer that sets into a solid form permanently when heated |
| Elastomer | type of polymer that easily stretches double its length and returns when stress is released |
| Crosslinking | joining of adjacent polymer molecules by forming chemical bonds 2 |
| Polycarbonate | tough highly transparent type of polymer classified as a thermoplastic |
| Plastic | term used interchangeably with polymer |
| Plasticity | ability to change shapes when stress is applied and retain the new shape when stress is removed |
| Thermoplastic | type of polymer that softens when heated and resolidifies when cooled. used for recycling. |
| Elasticity | property that measures a material's ability to return to its original shape when deformed |
| Polymer | long chain-like molecule made of repeating units |
