Question
Gutta percha has the same backbone as this material, but in the trans orientation rather than cis. For 10 points each:
[10m] Name this material made of isoprene monomers. Sulfur bridges were used to connect polymer chains of this bio-based material in an early cross-linking process discovered in the 1840s.
ANSWER: rubber [or natural rubber or latex rubber; prompt on elastomer; prompt on polyterpene or polyisoprene] (The crosslinking process is vulcanization, developed by Charles Goodyear.)
[10h] Extensive chemical cross-linking of polymers will form these insoluble network materials. Unlike thermoplastics, which only have physical cross-links, these materials cannot be remelted and remolded.
ANSWER: thermosets [or thermosetting polymers; prompt on plastics]
[10e] Crosslinking polymer chains greatly increases their already large value for this quantity. This quantity, often measured in daltons, is the sum total mass of a compound’s atoms.
ANSWER: molecular weight [or molecular mass; or molar mass; prompt on weight or mass or size]
<Chemistry>
Summary
| 2023 ACF Winter @ Columbia | 11/11/2023 | Y | 9 | 14.44 | 78% | 56% | 11% |
Data
| Yale B | Bard A | 0 | 0 | 10 | 10 |
| Columbia B | NYU B | 0 | 0 | 10 | 10 |
| Cornell C | Penn B | 10 | 10 | 10 | 30 |
| Columbia A | Princeton B | 10 | 0 | 0 | 10 |
| Rowan A | NYU A | 0 | 0 | 10 | 10 |
| Rutgers A | Columbia C | 10 | 0 | 10 | 20 |
| Vassar | Rutgers B | 10 | 0 | 0 | 10 |
| Haverford | Yale A | 0 | 0 | 10 | 10 |
| Penn A | Yale C | 10 | 0 | 10 | 20 |