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  3. Volume 17, Number 4, 2023
  4. Dependence of Linear Isobaric Thermal Expansivity of Polymers on Their Flexibility

Dependence of Linear Isobaric Thermal Expansivity of Polymers on Their Flexibility

JCCT.
2023;
Volume 17, Number 4
: pp. 796 - 799
https://doi.org/10.23939/chcht17.04.796
Authors:
  1. Witold Brostow
  2. Haley E. Hagg Lobland
  3. Nora A. Hamad
1
Department of Materials Science and Engineering, University of North Texas
2
Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Department of Physics, University of North Texas
3
Department of Materials Science and Engineering, University of North Texas; Department of Organic Chemistry, Faculty of Science, Menoufia University

We have obtained an equation for polymers relating their flexibility $Y$ defined in 2019 to the linear isobaric thermal expansivity $\alpha_L$. This way we have connected quantitatively a thermodynamic property to a mechanical one. The expansivity is important since different materials expand at different rates on the increase of temperature; the same applies to contraction resulting from cooling. Thus, a temperature change can cause disintegration of a composite with no mechanical force involved.

polymer flexibility
isobaric thermal expansivity
expansivity mismatch
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