| 31. | Improvements became possible in the 19th century with the introduction of rubber and discoveries of Vulcanization by Charles Goodyear.
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| 32. | Because of their low viscosity, these rubbers can be pumped through pipelines and tubes to the vulcanization equipment.
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| 33. | Thomas Hancock ( 1786 1865 ), a scientist and engineer, was the first to patent vulcanization of rubber.
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| 34. | In 1839 Charles Goodyear discovered the process of vulcanization, a method that would cure rubber, making it durable.
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| 35. | In 1920 Sebrell isolated mercaptobenzothiazole, a rubber vulcanization accelerator, and he devised ways of making it commercially pure.
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| 36. | An important precursor to the invention of the diaphragm was the rubber vulcanization process, patented by Charles Goodyear in 1844.
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| 37. | Vulcanization is the process of cross-linking molecules to make the bulk material harder, less breakable and more durable.
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| 38. | This is due to the diversity of its geological-tectonic structure, particularly with the new vulcanization during Tertiary Period.
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| 39. | The development of plastics also accelerated with Charles Goodyear's discovery of vulcanization to thermoset materials derived from natural rubber.
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| 40. | After a certain period of time, vulcanization starts and the Mooney viscosity increases ( Fig . 1, CDEF ).
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