Degradation and relaxation kinetics of polystyrene-clay nanocomposite prepared by surface initiated polymerization

Sergey Vyazovkin, Ion Dranca, Xiaowu Fan, Rigoberto Advincula

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Thermogravimetry and differential scanning calorimetry (DSC) have been used to study the thermal and thermo-oxidative degradation of polystyrene (PS) and PS-clay nanocomposite. An advanced isoconversional method has been applied for kinetic analysis. Introduction of the clay phase increases the activation energy and affects the total heat of degradation that suggests a change in the reaction mechanism. The obtained kinetic data permit comparative assessment of fire resistance of the studied materials. Relaxation kinetics have been measured by DSC and dynamic mechanical analysis. As compared to virgin PS, the clay nanocomposite shows the glass transition at a higher temperature and demonstrates markedly larger activation energy. This suggests that the clay phase lowers the molecular mobility of PS which is another factor contributing to the increased thermal stability of the nanocomposite.

Original languageEnglish
Pages (from-to)11672-11679
Number of pages8
JournalJournal of Physical Chemistry B
Volume108
Issue number31
DOIs
Publication statusPublished - 2004 Aug 5
Externally publishedYes

Fingerprint

Nanocomposites
Polystyrenes
Polymerization
clays
polystyrene
nanocomposites
Clay
polymerization
degradation
Degradation
Kinetics
Hot Temperature
Differential Scanning Calorimetry
kinetics
Differential scanning calorimetry
heat measurement
Activation energy
Thermogravimetry
activation energy
flammability

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Degradation and relaxation kinetics of polystyrene-clay nanocomposite prepared by surface initiated polymerization. / Vyazovkin, Sergey; Dranca, Ion; Fan, Xiaowu; Advincula, Rigoberto.

In: Journal of Physical Chemistry B, Vol. 108, No. 31, 05.08.2004, p. 11672-11679.

Research output: Contribution to journalArticle

Vyazovkin, Sergey ; Dranca, Ion ; Fan, Xiaowu ; Advincula, Rigoberto. / Degradation and relaxation kinetics of polystyrene-clay nanocomposite prepared by surface initiated polymerization. In: Journal of Physical Chemistry B. 2004 ; Vol. 108, No. 31. pp. 11672-11679.
@article{b561f68237584217abbbac4c0e5fc53e,
title = "Degradation and relaxation kinetics of polystyrene-clay nanocomposite prepared by surface initiated polymerization",
abstract = "Thermogravimetry and differential scanning calorimetry (DSC) have been used to study the thermal and thermo-oxidative degradation of polystyrene (PS) and PS-clay nanocomposite. An advanced isoconversional method has been applied for kinetic analysis. Introduction of the clay phase increases the activation energy and affects the total heat of degradation that suggests a change in the reaction mechanism. The obtained kinetic data permit comparative assessment of fire resistance of the studied materials. Relaxation kinetics have been measured by DSC and dynamic mechanical analysis. As compared to virgin PS, the clay nanocomposite shows the glass transition at a higher temperature and demonstrates markedly larger activation energy. This suggests that the clay phase lowers the molecular mobility of PS which is another factor contributing to the increased thermal stability of the nanocomposite.",
author = "Sergey Vyazovkin and Ion Dranca and Xiaowu Fan and Rigoberto Advincula",
year = "2004",
month = "8",
day = "5",
doi = "10.1021/jp048840d",
language = "English",
volume = "108",
pages = "11672--11679",
journal = "Journal of Physical Chemistry B Materials",
issn = "1520-6106",
publisher = "American Chemical Society",
number = "31",

}

TY - JOUR

T1 - Degradation and relaxation kinetics of polystyrene-clay nanocomposite prepared by surface initiated polymerization

AU - Vyazovkin, Sergey

AU - Dranca, Ion

AU - Fan, Xiaowu

AU - Advincula, Rigoberto

PY - 2004/8/5

Y1 - 2004/8/5

N2 - Thermogravimetry and differential scanning calorimetry (DSC) have been used to study the thermal and thermo-oxidative degradation of polystyrene (PS) and PS-clay nanocomposite. An advanced isoconversional method has been applied for kinetic analysis. Introduction of the clay phase increases the activation energy and affects the total heat of degradation that suggests a change in the reaction mechanism. The obtained kinetic data permit comparative assessment of fire resistance of the studied materials. Relaxation kinetics have been measured by DSC and dynamic mechanical analysis. As compared to virgin PS, the clay nanocomposite shows the glass transition at a higher temperature and demonstrates markedly larger activation energy. This suggests that the clay phase lowers the molecular mobility of PS which is another factor contributing to the increased thermal stability of the nanocomposite.

AB - Thermogravimetry and differential scanning calorimetry (DSC) have been used to study the thermal and thermo-oxidative degradation of polystyrene (PS) and PS-clay nanocomposite. An advanced isoconversional method has been applied for kinetic analysis. Introduction of the clay phase increases the activation energy and affects the total heat of degradation that suggests a change in the reaction mechanism. The obtained kinetic data permit comparative assessment of fire resistance of the studied materials. Relaxation kinetics have been measured by DSC and dynamic mechanical analysis. As compared to virgin PS, the clay nanocomposite shows the glass transition at a higher temperature and demonstrates markedly larger activation energy. This suggests that the clay phase lowers the molecular mobility of PS which is another factor contributing to the increased thermal stability of the nanocomposite.

UR - http://www.scopus.com/inward/record.url?scp=4143148412&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4143148412&partnerID=8YFLogxK

U2 - 10.1021/jp048840d

DO - 10.1021/jp048840d

M3 - Article

AN - SCOPUS:4143148412

VL - 108

SP - 11672

EP - 11679

JO - Journal of Physical Chemistry B Materials

JF - Journal of Physical Chemistry B Materials

SN - 1520-6106

IS - 31

ER -