Next Article in Journal
Effect of Fibre Orientation and Hostile Solutions on Stress Relaxation of Glass/Polyamide Composites
Previous Article in Journal
Hybrid Composites Based on Polypropylene with Basalt/Hazelnut Shell Fillers: The Influence of Temperature, Thermal Aging, and Water Absorption on Mechanical Properties
Open AccessArticle

The Effect of a Secondary Process on the Analysis of Isothermal Crystallisation Kinetics by Differential Scanning Calorimetry

School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(1), 19; https://doi.org/10.3390/polym12010019
Received: 5 November 2019 / Revised: 13 December 2019 / Accepted: 18 December 2019 / Published: 20 December 2019
(This article belongs to the Section Polymer Physics)
This paper demonstrates the application of a modified Avrami equation in the analysis of crystallisation curves obtained using differential scanning calorimetry (DSC). The model incorporates a square root of time dependence of the secondary process into the conventional Avrami equation and, although previously validated using laser flash analysis and infrared spectroscopy, is not currently transferable to DSC. Application of the model to calorimetric data required long-duration isotherms and a series of data treatments. Once implemented, the square root of time dependence of the secondary process was once again observed. After separation of the secondary process from the primary, a mechanistic n value of 3 was obtained for the primary process. Kinetic parameters obtained from the analysis were used in the model to regenerate the fractional crystallinity curves. Comparison of the model with experimental data generated R2 values in excess of 0.995. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) was used as model polymer due to the prominent secondary crystallisation behaviour that this polymer is known to display. View Full-Text
Keywords: DSC; Avrami; poly(3-hydroxybutyrate-co-3-hydroxyvalerate); secondary crystallisation; kinetics DSC; Avrami; poly(3-hydroxybutyrate-co-3-hydroxyvalerate); secondary crystallisation; kinetics
Show Figures

Graphical abstract

MDPI and ACS Style

Kelly, C.A.; Hay, J.N.; Turner, R.P.; Jenkins, M.J. The Effect of a Secondary Process on the Analysis of Isothermal Crystallisation Kinetics by Differential Scanning Calorimetry. Polymers 2020, 12, 19. https://doi.org/10.3390/polym12010019

AMA Style

Kelly CA, Hay JN, Turner RP, Jenkins MJ. The Effect of a Secondary Process on the Analysis of Isothermal Crystallisation Kinetics by Differential Scanning Calorimetry. Polymers. 2020; 12(1):19. https://doi.org/10.3390/polym12010019

Chicago/Turabian Style

Kelly, Catherine A.; Hay, James N.; Turner, Richard P.; Jenkins, Mike J. 2020. "The Effect of a Secondary Process on the Analysis of Isothermal Crystallisation Kinetics by Differential Scanning Calorimetry" Polymers 12, no. 1: 19. https://doi.org/10.3390/polym12010019

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop