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Polymer materials by source

2015-12-30

Divided according to characteristics of a polymer material rubber, fiber, plastic, polymer adhesives, coatings and polymer-based polymer composites. 

① rubber is a kind of linear flexible polymers. Between the molecular chains of small secondary valence forces, the molecular chain flexibility, the external force can generate a larger deformation force after removal of restitution quickly. There are two kinds of natural rubber and synthetic rubber.

② fiber into natural fiber and chemical fiber. The former refers to silk, cotton, linen, wool and so on. The latter is a natural polymer or a synthetic polymer as raw material, spinning and post-processing system. Times the price of fibers in large and small deformed capability, high modulus, generally crystalline polymer. 

③ plastic or synthetic resin is chemically modified natural polymer as a main component, and then adding a filler, a plasticizer and other additives was prepared. Secondary valence forces between its molecules, modulus and shape variables between between rubber and fibers. Usually divided according to the characteristics of the synthetic resin thermoset plastics and thermoplastics; by end-use is divided into general-purpose plastics and engineering plastics. 

④ Adhesive is a synthetic polymer-based system into a natural polymer adhesive material. It is divided into two kinds of natural and synthetic adhesives. Application of more synthetic adhesives.

 ⑤ polymer coating is a polymer film as the main material, adding a solvent and various additives prepared. Depending on the film material, divided into grease paint, natural resin paint and synthetic resin coating. 

⑥ polymer matrix composite material is a polymer compound as the base, adding a variety of reinforced composite material obtained. It combines the performance characteristics of the original material, and can be designed according to the material needs. High molecular composite materials, also known as polymer-modified, modified into molecular modification and blending modification.

⑦ functional polymer materials. Functional polymer materials in addition to general mechanical properties, insulation and thermal properties of a polymer having, but also with the material, energy and information conversion, magnetic, transmission and storage, and other special functions. There has been a high molecular information into useful materials, transparent polymer materials, polymer simulated enzymes, biodegradable polymer materials, shape memory polymer materials and medical, pharmaceutical and other polymer materials.

Polymer according to its mechanical properties and the use of state can be divided into the above categories. However, there is no strict boundaries between various types of polymers, the same polymers, using different methods of synthesis and molding process, can be made of plastic, can be made into fibers, such as nylon is the case. The polyurethane-type polymers, both at room temperature and the nature of the glassy state, have good flexibility, it is difficult to say that it is a rubber or plastic.

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