Equation icon  Degree of crystallinity

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Resource type: Equation
Description: This equation is used to determine the percentage crystallinity for a semi-crystalline sample by the measured density of the sample and of the densities of the fully crystalline and fully amorphous states (assuming no voids are present).

TeX format: \% C = \frac{\rho_c}{\rho_s} \left ( \frac{\rho_s -\rho_a}{\rho_c - \rho_a} \right ) \times 100

%C {\% C} = crystallinity of sample (%) {\%}
ρs {\rho_s} = density of crystalline solid (kg.m-3) {kg.m^{-3}}
ρa {\rho_a} = density of amorphous solid (kg.m-3) {kg.m^{-3}}
ρc {\rho_c} = density of sample with unknown & crystallinity (kg.m-3) {kg.m^{-3}}

Keywords: polymer • crystallinity • semi-crystalline • solidification • density • analysis • plastic
Categories: Science approaches
Science approaches > Structure, bonding & defects > Crystal structure
Science approaches > Microstructure
Materials > Polymers & elastomers
Processes > Thermal treatments
Testing, analysis & experimentation
Created by: The University of Liverpool
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Date created: 18 August 2010
Date added: 14 September 2010
Resource ID: 3204