Question

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

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