Whatever we should know about low density polyethylene?
Low-density polyethylene – LDPE is terminologically composed of two terms monomer meaning single part and ethylene which is a hydrocarbon with the formula C 2 H 4. Lightweight polyethylene was produced in 1933 under very high pressure and along with the radical release of polymerization by the British company ICT. Also, the rate of degradability of this material in nature according to the EPA or environmental protection test is equal to 5.7%, which is determined by the degradability number 4. Despite the fact that many polymer products have been produced and industrialized in global markets, today LDPE is considered as one of the most important products in the plastic industry, so that in 2013, the revenue of this product in the markets around the world was about $ 33 billion. it is arrived . Properties of lightweight polyethylene – LDPE LDPE densities range from 0.91 to 0.940 g / m3.…
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…