We usually learn about plastics in terms of appearance, color, tension, size, etc., so what about plastics from a chemical point of view?
Synthetic resin is the main component of plastic, and its content in plastic is generally 40% to 100%. Due to the large content and the properties of resins that often determine the properties of plastics, people often regard resins as synonymous with plastics.
Plastic is a polymer compound that is made of monomer as raw material and polymerized by addition or polycondensation reaction. Its resistance to deformation is moderate, between fiber and rubber. It is composed of additives such as agents and pigments.
Plastic Definition and Composition: Plastic is any synthetic or semi-synthetic organic polymer. In other words, plastic always contains carbon and hydrogen, although other elements may be present. While plastics can be made from almost any organic polymer, most industrial plastics are made from petrochemicals. Thermoplastics and thermoset polymers are two types of plastics. The name “plastic” refers to plasticity, the ability to deform without breaking. The polymers used to make plastics are almost always mixed with additives, including colorants, plasticizers, stabilizers, fillers, and reinforcing agents. These additives affect the chemical composition, chemical and mechanical properties of plastics, as well as cost.
Thermosets and Thermoplastics: Thermoset polymers, also known as thermosets, cure into a permanent shape. They are amorphous and believed to have infinite molecular weight. Thermoplastics, on the other hand, can be heated and reshaped over and over. Some thermoplastics are amorphous, while some have a partially crystalline structure. Thermoplastics typically have molecular weights between 20,000 and 500,000 AMU.
Post time: Sep-17-2022