The Isolation of Rubber from Milkweed Leaves. An Introductory Organic Chemistry Lab

• Lisa Volaric ^[1] ; John Hagen ^[1]
  1. [1] Chatham College, United States
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 79, Nº 1, 2002, pág. 91
• Idioma: inglés
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• Resumen

  • We present an introductory organic chemistry lab in which students isolate rubber from the leaves of milkweed plants (Asclepias syriaca). Students isolated rubber with a recovery of 2.4 ± 1.8% and 1.8 ± 0.7% for the microscale and macroscale procedures, respectively. Infrared spectra of their products were compared with the spectrum of synthetic rubber, cis-polyisoprene. Students tested for elasticity of their product by twisting it on a spatula and pulling; all students found some degree of elasticity.