Shinil Chemical Industry Co., Ltd.
▣ What is Polymer?
chemical compound with high molecular weight consisting of a number of structural units linked together by covalent bonds. The simple molecules that may become structural units are themselves called monomers. A structural unit is a group having two or more bonding sites. In a linear polymer, the monomers are connected in a chain arrangement and thus need only have two bonding sites. When the monomers have three bonding sites, a nonlinear, or branched, polymer results. Naturally occurring polymers include celllose, proteins, natural rubber, and silk; those synthesized in the laboratory have led to such commercially important products as Plastics, synthetic fibers, and synthetic rubber.
▣ What is Resin?
any of a class of amorphous solids or semisolids. Natural resins occur as plant exudations (e.g., of pines and firs), and are also obtained from certain scale insects. They are typically yellow to brown in color, tasteless, and translucent or transparent. Oleoresins contain essential oils and are often sticky or plastic; other resins are exceedingly hard, brittle, and resistant to most solvents. Resins are used in varnish, shellac, and lacquer and in medicine. Synthetic resins, e.g., bakelite, are widely used in making Plastics. See also amber; turpentine.
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