Question

This material is subject to the Payne effect when it is reinforced with carbon black. Gutta-percha is a naturally occurring (15[1])form of this substance that is a trans isomer. Introducing ozone to this material can cause its “cracking” (15[1])to occur. (15[2])The polymerization (-5[1])of chloroprene (15[1])can form neoprene, a type of this material. Buna-N (15[1])is a (*) “nitrile” form of this material that (10[1])is resistant to oil. Polymers of isoprene make up this (-5[1])material, (-5[1])which in a cross-linking process is heated and cured with sulfur. That process, known as vulcanization, was developed (10[1])by Charles Goodyear. (10[1])For 10 points, name this material formed from latex that is found in car tires. (10[1])■END■ (10[1])

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