Molecular Design of High Density Polyethylene and it’s Applications in Industrial Products

A. Doufas
ExxonMobil Chemical Company,
United States

Keywords: HDPE, ethylene, shale gas

Summary:

High Density Polyethylene (HDPE) is a material of fast growth due to abundance of ethylene from shale gas in North America and due to versatile utilization of HDPE in a wide range of applications including pipe, blow molding and film. This talk will provide an overview of the different types of high density polyethylene (HDPE) products used as structural materials for applications such as high pressure pipe and fuel tanks. Structure-property relationships for unimodal and bimodal HDPE products with emphasis on slow crack growth resistance (SCGR) will be discussed. Examples of screening of HDPE resins for new product development in terms of SCGR using accelerated methods e.g. strain hardening modulus will be provided. With such methods, one can predict the pipe ranking e.g. PE-80, PE-100 etc. for product development screening purposes. In this talk, we will also highlight the results of some flow-induced crystallization (FIC) studies performed for different types of HDPE materials.