The plastics that we usually use is not a pure substance. It is created by the preparation of a lot of supplies, in which the higher polymer (or synthetic resin) is its main component. In addition, in order to improve the functionality of plastics, a variety of auxiliary materials should also be added in the polymer, such as fillers, plasticizers, lubricants, stabilizers, coloring agents, and so on, so as to make the plastics have good efficiency.
1st, synthetic resin
Synthetic resin is the principal component of plastics. The general content of synthetic resin in plastics is from 40% to one hundred%. Due to the fact of its large content, the nature of synthetic resin often determines the nature of the plastics, so folks frequently take resin as a synonym of plastics. In fact, resin and plastics are two diverse ideas. Resin is a raw polymer which has not been processed. Whilst for most plastics, besides the resin as its principal component, there are also some other substances.
Fillers can enhance the strength and heat-resistant good quality of the plastics, as effectively as decrease the expense. For instance, adding wood flour into phenolic resin can drastically decrease the cost, which tends to make the phenolic plastic as a single of the least expensive plastics. At the identical time, it can also drastically improve the mechanical strength. Fillers can be divided into organic filler and inorganic filler, with the former as wood flour, rags, paper and all types of textile fibers, and the latter as glass fibers, diatomaceous earth, asbestos, and carbon black.
Plasticizers can enhance the plasticity and flexibility of the plastics, lessen brittleness, and make the plastics easy to be processed and molded. Plasticizers are typically organic compounds with high boiling point, miscible with the resin, non-toxic, odorless, and steady to light and heat. The generally utilized plasticizers incorporate phthalates, benzophenone, and so on.
In order to stop the decomposition and harm of synthetic resin brought on by light and heat, and to extend its service life, it is required to add stabilizers in plastics. The typically employed stabilizers include stearate, epoxy resin and so on.
Fifth, coloring agents
Coloring agents can supply the plastics with a variety of vibrant and beautiful colors. Organic dyes and inorganic pigments are typically utilized as coloring agent.
In addition to the above additives, other additives can also be added in plastics, such as lubricants, flame retardants, blowing agents, antistatic agents, and so on, so as to meet various operating requirements.
Chenxia Wang is the freelance writer for e-commerce internet site in the chemistry. LookChem.com is just a spot for you to Look for Chemicals! Our LookChem supply the most convenient circumstances for the international purchasers and let these leads advantage all the company person.
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