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Title: Phase transformations in metastable liquids combined with polymerization

Abstract

Here, we report on the theory of nucleation and growth of crystals in a metastable polymer melt with allowance for the polymerization of a monomer. A mathematical model consisting of the heat balance equation, equations governing the particle-radius distribution function and the polymerization degree is formulated. The exact steady-state analytical solutions are found. In the case of unsteady-state crystallization with polymerization, the particle-size distribution function is determined analytically for different space–time regions by means of the Laplace transform. Two functional integro-differential equations governing the dimensionless temperature and polymerization degree are deduced. These equations are solved by means of the saddle-point technique for the evaluation of a Laplace-type integral. The time-dependent distribution function, temperature and polymerization degree at different polymerization rates and nucleation kinetics are derived with allowance for the main contribution to the Laplace-type integral. In addition, the general analytical solution by means of the saddle-point technique and an example showing how to construct the analytical solutions in particular cases are given in the appendices. The analytical method developed in this paper can be used to describe the similar phase transition phenomena in the presence of chemical reactions.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Ural Federal Univ. (Russian Federation)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1547036
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences
Additional Journal Information:
Journal Volume: 377; Journal Issue: 2143; Journal ID: ISSN 1364-503X
Publisher:
The Royal Society Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; polymerization; crystallization; nucleation; metastable liquid

Citation Formats

Ivanov, Alexander A., Alexandrova, Irina V., and Alexandrov, Dmitri V. Phase transformations in metastable liquids combined with polymerization. United States: N. p., 2019. Web. doi:10.1098/rsta.2018.0215.
Ivanov, Alexander A., Alexandrova, Irina V., & Alexandrov, Dmitri V. Phase transformations in metastable liquids combined with polymerization. United States. doi:10.1098/rsta.2018.0215.
Ivanov, Alexander A., Alexandrova, Irina V., and Alexandrov, Dmitri V. Mon . "Phase transformations in metastable liquids combined with polymerization". United States. doi:10.1098/rsta.2018.0215. https://www.osti.gov/servlets/purl/1547036.
@article{osti_1547036,
title = {Phase transformations in metastable liquids combined with polymerization},
author = {Ivanov, Alexander A. and Alexandrova, Irina V. and Alexandrov, Dmitri V.},
abstractNote = {Here, we report on the theory of nucleation and growth of crystals in a metastable polymer melt with allowance for the polymerization of a monomer. A mathematical model consisting of the heat balance equation, equations governing the particle-radius distribution function and the polymerization degree is formulated. The exact steady-state analytical solutions are found. In the case of unsteady-state crystallization with polymerization, the particle-size distribution function is determined analytically for different space–time regions by means of the Laplace transform. Two functional integro-differential equations governing the dimensionless temperature and polymerization degree are deduced. These equations are solved by means of the saddle-point technique for the evaluation of a Laplace-type integral. The time-dependent distribution function, temperature and polymerization degree at different polymerization rates and nucleation kinetics are derived with allowance for the main contribution to the Laplace-type integral. In addition, the general analytical solution by means of the saddle-point technique and an example showing how to construct the analytical solutions in particular cases are given in the appendices. The analytical method developed in this paper can be used to describe the similar phase transition phenomena in the presence of chemical reactions.},
doi = {10.1098/rsta.2018.0215},
journal = {Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences},
number = 2143,
volume = 377,
place = {United States},
year = {2019},
month = {3}
}

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Cited by: 7 works
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    Works referencing / citing this record:

    Dynamics of particulate assemblages in metastable liquids: a test of theory with nucleation and growth kinetics
    journal, April 2020

    • Alexandrova, Irina V.; Alexandrov, Dmitri V.
    • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 378, Issue 2171
    • DOI: 10.1098/rsta.2019.0245