تسجيل الدخول

تسجيل

Polyethylene and Related Polymers

المؤلف:  A. Ravve

المصدر:  Principles of Polymer Chemistry

الجزء والصفحة:  329

2026-01-26

398

Polyethylene and Related Polymers

Polyethylene is produced commercially in very large quantities in many parts of the world. The monomer can be synthesized from various sources. Today, however, most of ethylene comes from petroleum by high temperature cracking of ethane or gasoline fractions. Other potential sources can probably be found, depending upon the availability of raw materials. Two main types of polyethylene are manufactured commercially. These are low (0.92–0.93 g/cm³) and high (0.94–0.97 g/cm³) density polymers. The low-density material is branched while the high density one is mostly linear and much more crystalline. The most important applications for the low-density polyethylene are in films, sheets, paper, wire and cable coatings, and injection molding. The high-density material finds use in blow molded objects and in injection molding.