Let us always remember those who contributed to plastic

In the 15th century, Maya in the Americas used natural rubber as a container, rain gear and other daily necessities.
1839 American Goodyear discovered that natural rubber and sulfur have changed properties significantly, making it a change from an unpractical character, such as low hardness, softening by thermal stickiness, and brittle fracture due to cold. For elastic, plastic materials.
1869 The United States's John Wesley Hyatt (1837-1920) co-heated a mixture of nitrocellulose, camphor, and ethanol under high pressure to produce the first artificial synthetic plastic "cellulose."
The 1887 Count Hilaire de Chardonnet was spun using a nitrocellulose solution to produce the first rayon.
1909 American Leoch Baekeland reacts phenol with formaldehyde to produce the first completely synthetic plastic-phenolic resin.
1920 Hermann Staudinger published a paper on "Uber Polymerization" that states that macromolecules are chemically reacted (polymerized) by monomers with the same chemical structure and are chemically bonded together. The term molecular compound, polymer or polymer is derived from this.
1926 The Swedish chemist Swidberg and others designed an ultracentrifuge to measure the molecular weight of a protein: it was proved that the molecular weight of a polymer was indeed from tens of thousands to millions.
1926 American chemist Waldo Semon synthesized polyvinyl chloride, and in 1927 achieved industrial production.
1930 Polystyrene (PS) was invented.
1932 Hermann Staudinger summed up his own theory of macromolecules and published an epoch-making giant work "Polymer Organic Compounds" as a sign that Polymer Chemistry was established as a new discipline.
1935 Polyamide 66, nylon, was synthesized by Wallace H. Carothers (1896-1937) of the Department of Organic Chemistry at DuPont's Institute of Basic Chemistry. Nylon achieved industrial production in 1938.
1930 The Germans used sodium metal as a catalyst to synthesize butyl sodium rubber and styrene butadiene rubber from butadiene.
In 1940, the Englishman, Win Whirlfield (1901-1966), synthesized polyester fibers (PET).
1940s Peter Debye invented a method for measuring the molecular weight of a polymer by light scattering.
1948 Paul Flory established the mathematical theory of long-chain polymer structure.
1950s The German Karl Ziegler and Italian Giulio Natta used a metal complex catalyst to synthesize polyethylene and polypropylene, respectively.
1955 Americans used is a Ziegler-Natta catalyst to polymerise isoprene. For the first time, synthetic synthetic natural rubbers with the same structure as natural rubber were artificially synthesized.
1971 SL Wolek Invented Kevlar, which can withstand temperatures up to 300oC.

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