Before the polymer material is processed, it is first synthesized, and the monomer is synthesized into a polymer for granulation, and then melt processing is performed. The synthesis methods of the polymer materials include bulk polymerization, suspension polymerization, emulsion polymerization, and solution polymerization. Among them, the initiator plays an important role. The azo initiator and the peroxy initiator are commonly used initiators. The polymer material additives often have an obvious effect on the improvement of the performance of the polymer material and the cost reduction. .
Processing and processing of polymer materials is not a pure physical process, but an important part of determining the final structure and properties of polymer materials. In addition to adhesives and coatings, there is no need for processing and forming, but direct use of rubber, fiber, plastic, etc. usually requires processing into a product by a corresponding forming method. Commonly used molding methods for plastic products include extrusion, injection, calendering, blow molding, molding or transfer molding. The rubber product has a forming process such as mastication, kneading, calendering or extrusion. The fibers have a spinning solution preparation, fiber forming and winding, post-treatment, stretching and heat setting of nascent fibers, and the like.
During the molding process, the polymer may be affected by changes in temperature, pressure, stress, and time of action, resulting in polymer degradation, cross-linking, and other chemical reactions that cause changes in the aggregate structure and chemical structure of the polymer. Therefore, the processing process not only determines the appearance shape and quality of the polymer material product, but also has an important influence on the material supramolecular structure, the weave structure and even the chain structure.
Yongyue cryo vials are made of medical grade polypropylene (PP) and have no endotoxin. They are disposable laboratory consumables specially used for storing biological samples.
The anti-slip texture of the cap and body is easy to screw cap.
The tube cap has an O-ring built-in gasket to prevent liquid leakage.
The cryo tube is suitable for ultra-low temperature refrigerators, and the tolerance temperature is -86~121 °C, and it can be repeatedly frozen and thawed.
In the gaseous state of liquid nitrogen, it can withstand low temperature to -167 ℃.
According to different requirements, there are ordinary grade and PCR grade. PCR grade products are free of DNase, RNase, endotoxin and foreign DNA. Sterilized by gamma irradiation, sterile.
Cryo Vials,Cryovial 2ml,Cryotube 1.8 ml,Cryogenic Vials,0.5 ml Cryogenic Vials
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