We need to design a new grade of flexible, impact-resistant polyethylene for use as a thin film, which requires a density of 0.88 to 0.915 g/cm^3 . The density of amorphous polyethylene is about 0.87 g/cm^3 . What is the %crystallinity required to produce these properties. Also the equivalent of two ethylene repeat unit is contained within each unit cell.
We need to design a new grade of flexible, impact-resistant polyethylene for use as a thin film, which requires a density of 0.88 to 0.915 g/cm^3 . The density of amorphous polyethylene is about 0.87 g/cm^3 . What is the %crystallinity required to produce these properties. Also the equivalent of two ethylene repeat unit is contained within each unit cell.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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We need to design a new grade of flexible, impact-resistant polyethylene for use as a thin film, which requires a density of 0.88 to 0.915 g/cm^3 . The density of amorphous polyethylene is about 0.87 g/cm^3 . What is the %crystallinity required to produce these properties. Also the equivalent of two ethylene repeat unit is contained within each unit cell.
Transcribed Image Text:Crystal Structure
Polymer
Polyethylene
Lattice Parameters
Orthorhombic
ao=0.741 nm, bo=0.495 nm and co=0.255 nm.
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