Structural relaxation in polymeric glasses

Aleksey D. Drozdov

doi:10.1016/S0009-2614(00)00868-X

Structural relaxation in polymeric glasses

Aleksey D. Drozdov

Research output: Contribution to journal › Article › peer-review

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Abstract

Constitutive equations are derived for the kinetics of physical aging in polymeric glasses. A polymer is treated as an ensemble of cooperatively re-arranging regions (CRR) which relax at random times as they are thermally agitated. According to the coarsening concept, structural recovery is modeled as fragmentation and aggregation of relaxing regions, whose rates are determined by volumes of appropriate CRRs. To verify the model, experimental data in dynamic shear tests for two kinds of poly(vinyl acetate) are compared with results of numerical simulation. Fair agreement is demonstrated between observations and predictions of the model.

Original language	English
Pages (from-to)	54-60
Number of pages	7
Journal	Chemical Physics Letters
Volume	327
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(00)00868-X
State	Published - 1 Sep 2000
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(00)00868-X

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title = "Structural relaxation in polymeric glasses",

abstract = "Constitutive equations are derived for the kinetics of physical aging in polymeric glasses. A polymer is treated as an ensemble of cooperatively re-arranging regions (CRR) which relax at random times as they are thermally agitated. According to the coarsening concept, structural recovery is modeled as fragmentation and aggregation of relaxing regions, whose rates are determined by volumes of appropriate CRRs. To verify the model, experimental data in dynamic shear tests for two kinds of poly(vinyl acetate) are compared with results of numerical simulation. Fair agreement is demonstrated between observations and predictions of the model.",

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AU - Drozdov, Aleksey D.

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N2 - Constitutive equations are derived for the kinetics of physical aging in polymeric glasses. A polymer is treated as an ensemble of cooperatively re-arranging regions (CRR) which relax at random times as they are thermally agitated. According to the coarsening concept, structural recovery is modeled as fragmentation and aggregation of relaxing regions, whose rates are determined by volumes of appropriate CRRs. To verify the model, experimental data in dynamic shear tests for two kinds of poly(vinyl acetate) are compared with results of numerical simulation. Fair agreement is demonstrated between observations and predictions of the model.

AB - Constitutive equations are derived for the kinetics of physical aging in polymeric glasses. A polymer is treated as an ensemble of cooperatively re-arranging regions (CRR) which relax at random times as they are thermally agitated. According to the coarsening concept, structural recovery is modeled as fragmentation and aggregation of relaxing regions, whose rates are determined by volumes of appropriate CRRs. To verify the model, experimental data in dynamic shear tests for two kinds of poly(vinyl acetate) are compared with results of numerical simulation. Fair agreement is demonstrated between observations and predictions of the model.

UR - https://www.scopus.com/pages/publications/0002153015

U2 - 10.1016/S0009-2614(00)00868-X

DO - 10.1016/S0009-2614(00)00868-X

M3 - Article

AN - SCOPUS:0002153015

SN - 0009-2614

VL - 327

SP - 54

EP - 60

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

Structural relaxation in polymeric glasses

Abstract

ASJC Scopus subject areas

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