Properties of the plastic-Iota

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Service > Properties of the plastic

Properties of the plastic

Plastic: plastic behavior of a material having a so-called plasticity is affected by external force, deformation occurs after external canceled, still hold when the force. Elastic modulus of the plastic between the rubber and the fiber, the force can occur a certain deformation. Soft plastic close to rubber, hard plastic close to the fiber.
Refers to a plastic resin (or the direct polymerization of the monomers used in the process) as a main component, with a plasticizer, a filler, a lubricant, a coloring agent and the like as a secondary component in the process to flow the molding material.
Plastics are synthetic polymers, body styles can be freely changed. Is the use of plastic raw material in the synthesis of a monomer or a condensation polymerization reaction, and a synthetic resin and a filler, plasticizers, stabilizers, lubricants, colorants and other additives, and its main component is a synthetic resin.
Plastic mainly has the following characteristics:
① most plastics lightweight, chemically stable, will not rust; ② good impact resistance; ③ has good transparency and abrasion resistance; ④ insulation, and low thermal conductivity; ⑤ general molding, coloring well, low processing costs; ⑥ most plastics poor heat resistance, thermal expansion coefficient, easy to burn; ⑦ poor dimensional stability, easily deformed; ⑧ most plastics poor low-temperature resistance, low temperature brittle; ⑨ easy to aging; ⑩ certain plastics easy dissolved in a solvent.
Plastics can be divided into two types of thermosetting and thermoplastic, the former can not reshape use, which can be repeated production.
A plastic polymer structure there are two basic types: the first one is a linear structure, a polymer compound having such a structure is called a linear polymer compound; a second body structure, such a polymer compound having the structure called body polymers. Some of the polymer having a branched chain, a branched polymer known as belonging to the linear structure. Although some polymer intermolecular crosslinking, but crosslinking less known network structure, belong to the body structure.
Two different structures, exhibits two opposite properties. Linear structure (including the branched chain structure) of the polymer molecules due to the presence of a separate, and therefore flexibility, plasticity, can be dissolved in a solvent, the heating can be melted, the hardness and brittleness of the smaller features. Since there is no independent body structure of macromolecular polymers exist, there is no elasticity and plasticity, can not dissolve and melt, only swelling, hardness and brittle. Polymer plastic the two structures are, by the linear polymer is made of thermoplastic polymer made by the body is a thermosetting plastic.

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