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These additives modify the polymer by forming crosslinks (bridges) between individual A vast array of products are made with vulcanized rubber including tires, shoe soles,. — “Vulcanization - Wikipedia, the free encyclopedia”, en.wikipedia.org
It is also an inelastic natural latex produced from the sap of these trees, particularly from the species Palaquium gutta. flexible again with hot water, but which did not become brittle, unlike unvulcanized rubber already in use. — “Gutta-percha - Wikipedia, the free encyclopedia”, en.wikipedia.org
It is useful directly in this form (indeed, the first appearance of rubber in Europe is cloth waterproofed with unvulcanized latex from Brazil) but, later, in 1839, Charles Goodyear invented vulcanized rubber; this a form of natural rubber heated. — “Plastic - Wikipedia, the free encyclopedia”, en.wikipedia.org