1. TV?
The birth of television is one of the greatest inventions of the 2th century. In modern society, life without TV is unimaginable. Black-and-white and color TVs with various models and functions have been continuously flowing into factories, schools, hospitals and families all over the world from one assembly line, which is miraculously changing people's lives rapidly. ?
2. nylon?
carothers, an American organic chemist, made a polymer from adipic acid and hexamethylene diamine in 1935. Because both components contained six carbon atoms, it was called polymer 66 at that time.
He melted the polymer and extruded it with an injection needle, and stretched it under tension, which is called fiber. This kind of fiber, polyamide 66 fiber, was named Nylon after industrialization in 1939, and it was the earliest industrialized synthetic fiber variety.
3. Plastic?
In the 196s, due to the shortage of ivory in the United States, there was a shortage of raw materials for making billiards. In 1869, the earliest artificial plastic celluloid was patented. Although celluloid is the earliest artificial plastic, it is artificial plastic, not synthetic plastic. The first synthetic plastic was made by pressing phenolic resin with a heating die, which was made by Belgian chemist Backlander in the early 2th century in 191.
Extended information:
There were the following inventions in science and technology in the 2th century:
1. Airplane
On December 17th, 193, the world's first manned power plane flew into the blue sky in Kitty Hawk, North Carolina, USA. This plane is called "Voyager-1", and its inventors are Wilbur Wright and Orville Wright brothers in the United States. ?
2. Penicillin
Professor alexander fleming, a famous British bacteriologist, invented the world-famous penicillin for the first time in 1928. Later, it was further studied and improved by British pathologist Flory and German biologist ernst boris chain. It was used in clinic in 1941 and gradually popularized in 1943.
Penicillin is recognized as the third major invention in World War II, alongside the atomic bomb and radar. Penicillin is an era when human beings bid farewell to bacteria without specific drugs, and it is a major breakthrough in the medical field. Since then, it has laid a protracted war between human beings and bacteria.