Plasticizers Have Good Performance
Plasticizers are usually a "solvent-like" substance that can improve their processability, flexibility, flexibility, stretch or expansibility when added to substances such as plastics, resins or elastomers. The addition of a plasticizer reduces the melt viscosity, the glass transition temperature and the elastic modulus of the elastomer without altering the basic chemical properties of the plasticized material.
Plasticizer can change the nature of the polymer, generally considered:
The plasticizer isolates the distance between the macromolecules of the polymer and weakens the force (attraction) between the polymer molecules, that is, Plasticizer weakening the van der Waals forces between the resin molecules;
② non-polar plasticizer added to the non-polar polymer, cut off the polar part of the polymer molecules, so that it does not occur polar connection, destruction of the polymer molecules between the dipole - dipole mutual effect;
③ plasticizer is even with the force and resin to be combined, rather than chemical (covalent bond) combination.
Therefore, where the resin can be mixed evenly, the mixture does not occur when the chemical reaction, mixing can change some of the properties of the resin, long-term retention in plastic products, change the nature of plastic products, can be used as plasticizers. The substances with these functions are mostly liquid organic compounds or low melting solids. They must be polar, compatible with resin, long in resin, have good properties for resin, Plasticizer high efficiency and inexpensive.
Plastic technology and application actually originated in the original invention of mankind. In ancient times, the clay is made of water, the gelatin is made of water dessert, the leather is soft with whale oil, the asphalt is used as the floor material, the nitrocellulose and the tar are used as the roof material. The water, whale oil and tar in the various products are Played a plasticizing effect, Plasticizer they are known as the various products in the plasticizer. In the course of more than a century later, with the plastic, rubber and other industrial development, to the literature in 1943 documented plasticizer has reached more than 20,000 kinds. Can produce more than 150 kinds of industrial production.
In 1975 the world's total plasticizer production reached 320,000 tons. By 2000 the world's total plasticizer production capacity has reached 6.4 million tons, Plasticizer there are more than 500 industrial varieties. The total sales of plasticizers accounted for 60% of plastic additives.
Since then, with the rapid development of the plastics industry, but also appeared in a better performance, resistance to migration, low-volatile polyester plasticizer, epoxy plasticizer, low temperature plasticizer and for rocket propellant, Military supplies and other applications of high-energy plasticizer.
Now, the plasticizer industry has been the form of phthalate-based multi-species, high-volume production of one of the important fine chemical products, its varieties and production in the plastic additives are the first in the ranks.
Many plasticizers can play a significant role in changing the properties of polymers, Plasticizer polymer processing and product performance.
① reduce the glass transition temperature of the polymer.
② change the structure of the polymer, so that the plasticized material is soft.
③ increase the elongation of the polymer, reduce the tensile strength.
④ increase the toughness of the polymer to improve the impact resistance.
⑤ improve low temperature performance.
⑥ reduce the viscosity of the polymer to improve the processing of polymer and its ingredients mixture.
⑦ change the flow of the polymer properties, Plasticizer especially in the product of high polymer content of the product.
⑧ reduce the melting temperature, reduce the gel temperature, shorten the mixing time, reduce the extrusion pressure (to facilitate the melt can be in a variety of different models of equipment processing operations, reduce the use of adhesive temperature, improve brushing smoothness) The
⑨ use of products in the plasticizer to improve the interaction with water: hydrophilic plasticizer to increase the product of water adsorption, increase the aging of water active products, reduce or increase the adhesion, causing expansion and so on; Water plasticizers reduce the sensitivity of the product to water.
⑩ contributes to the dispersibility of liquids and solid additives. Plasticizer The effect of fillers, dyes and other liquid additives that are easily soluble in plasticizers is more pronounced.
⑪ Increase or decrease the electrical conductivity or insulation of the product.
⑫ improve the product on the burning of the sensitivity, increase the flame retardant, inhibit the amount of smoke.
Biodegradable biodegradability. The addition of biodegradable plasticizers to biodegradable substances can increase the rate of degradation of the product.
⑭ improve the adhesion between the plastic film and vibration attenuation.
⑮ increase the gloss of the product transparency.
⑯ improve the volatility of products, Plasticizer reduce the product of the fog and the product surface of the oil droplets.
Reduce the product's frost and crystallinity.
Improve the refraction of light.
Improve the migration of low molecular weight substances to the surface of the article.
Increase the gas permeability of the product.
⑳ Increases the compatibility of the polymer with the additive.