Density polyethylene and low density polyethylene
Polyethylene people know as (PE) , it is a thermoplastic polymer with a variable crystal structure that has the simplest molecular structure n (CH2-CH2–) among polymers and has a wide range of applications depending on its specific type. This plastic material was first produced in 1933 by Faust and Gibson in a laboratory, and today this type of plastic is widely produced and used in the world, ie about tens of millions of tons per year; Hence this exceptional polymer is widely used in plastic products around the world Types of polyethylene There are several types of polyethylenes, two of which are the most popular, one being low density polyethylene (LDPE) and the other being high density polyethylene (HDPE). The term density used to describe this type of plastic refers to the ways in which polymer molecules bond. In fact, the molecular structure is what makes all kinds of plastics with…
What are other types of polyethylene?
There are different types with varying ranges of crystallinity and density. The density of polyolefins is the lowest among all polymers and is divided into three ranges for polyethylene: the low density region from 0.91 to 0.925 g, the light polyethylene region (LDPE), the medium density region (MDPE) from 0.926 Up to 0.94 g / cm3 and the density range from 0.94 to 0.965 g / cm3 which is labeled as heavy polyethylene (HDPE). Heavy Polyethylene (HDPE) The name HDPE is used if the main chain is polyethylene and has few or no short side branches. HDPE is a white, opaque solid that forms brittle films. These polymers are very crystalline (70-80%) and their melting point is about 130 degrees Celsius. Density is usually used as a measure of the percentage of crystals of alkyls such as alpha-olefins (α) including 1-butene, 1-hexene and 1-octene as a comonomer during polymerization. In…
What is Green rubber process oil ?
Green rubber process oil is also one of the oil products used in the rubber tire industry, which contains less than 10 ppm in terms of the presence of polyaromatic hydrocarbon compounds, especially 8PAH. These oils are of special importance and have been used in world-class countries and European and reputable rubber and tire brands because of their high environmental characteristics. Green products are goods that are environmentally friendly or in other words will not pollute the environment around us. Green rubber process oil is also one of the oil products used in the tire and rubber industry. These oils have been used in world-class countries and European and reputable rubber and tire brands because of their high environmental characteristic. Rubber process oils and CBFS are used in industries such as rubber after being converted to carbon black soot in the soot industry.
What are the differences between SMR20 and synthetic rubber ?
The difference between natural rubber and synthetic rubber In 1839, an American inventor named Charles Goodyear developed a method to improve the properties of natural rubber, making it stronger and more usable. He called this process the vulcanization or boiling of oxygen in rubber and metals. This process revolutionized the rubber industry. Natural rubber is an elastomer (elastic hydrocarbon polymer) made from raw rubber, a milk colloid obtained from most plants. Elastomer is a material that can withstand more elastic deformation than other materials under stress and return to its original size without any deformation. The commercial source of natural rubber is a native Brazilian plant called Hoya brazilensis, which belongs to the Euphorbia family. Some other plants from which natural rubber can be obtained are: gutta-percha, rubber-shaped, Panamanian rubber tree, common dandelion and Russian dandelion. Natural rubber was used commercially until the twentieth century. Natural rubber has occupied an…