BOT 1200 Lecture Notes - Lecture 11: Hevea Brasiliensis, Castilla Elastica, Vascular Cambium
30 Mar 2016
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Document Summary
Joseph priestly (1770) used the term rubber because it could erase pencil marks. Panama rubber: casilla elasica, aztecs used this rubber for ball games, dipped feet in latex to make form-it shoes. Spaniards exploring south america dipped hats and cloaks in latex to produce waterproof clothing. Became sicky in hot weather, britle in cold. 1823: charles macintosh develops the raincoat raincoats are called macs in england. 1839: charles goodyear invented vulcanizaion combined heated latex with sulphur and lead oxide to prevent rubber from being sicky or britle. 1880-1911: demand exceeded supply and the rubber boom turned into the rubber bust. 1876: henry wickham collected 70,000 brasiliensis seeds from brazil started plantaions in asia; these are the basis for most of todays"s natural rubber producion rubber in south america was replaced by cofee limited rubber supply during wwii. 1910: south east asia producion of amazonian wild rubber, brazilian monopoly broken. 1939-1945: japan invaded se asia, haling rubber supply.
