However, the recommended humidity level is between 30% and 50%. During the winter months, humidity levels are low (sometimes very low). However, these levels skyrocket during the summer months. The high humidity during the summer reduces the rate of evaporation of moisture from our bodies.
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Isoprene was first isolated by thermal decomposition of natural rubber. It is most readily available industrially as a byproduct of the thermal cracking of naphtha or oil, as a side product in the production of ethylene. About 800,000 tonnes are produced annually. About 95% of isoprene production is used to produce cis-1,4-polyisopreneâa synthetic version of natural rubber. Natural rubber consists mainly of poly-cis-isoprene with a molecular weight of 100,000 to 1,000,000. Typically natural rubber contains a few percent of other materials, such as proteins, fatty acids, resins, and inorganic materials.