Time-resolved rheology as a tool to monitor the progress of polymer degradation in the melt state - Part II: Thermal and thermo-oxidative degradation of polyamide 11/organo-clay nanocomposites

Nadka Tzankova Dintcheva, Filippone, Curcuruto, Gambarotti, Carroccio, Passaglia

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26 Citazioni (Scopus)

Abstract

Abstract Thermal and thermo-oxidative degradation of nanocomposites based on polyamide 11 (PA11) and organo-modified clay (Cloisite® 30B) are studied in the melt state (T = 215 °C) via time-resolved mechanical spectroscopy (TRMS). The goal is assessing the potentiality of rheological analysis for studying polymer degradation in complex systems such as polymer nanocomposites, whose rheological response stems from the combination of the contributions of polymer and nanoparticles. We prove that a thorough analysis grounded on TRMS allows to isolate the effect of degradation of the polymer matrix, whose progress can be hence profitably monitored. Essentially the same degradation mechanisms as in neat PA11 are identified for the nanocomposite, but the kinetics of the thermo-oxidation processes are much faster in the presence of organo-clay. In particular, rheology promptly identifies cross-linking reactions since the early stage of the treatment in air. Matrix-assisted laser desorption/ionization and oxidative induction time measurements corroborate the conclusions drawn on the basis of rheological analyses, shedding light on the chemical aspects of PA11 degradation. Overall, rheological analysis confirms to be a valuable tool for monitoring polymer degradation even in case of inherently complex systems such as nanocomposites. In this case, however, the analysis can be difficult if the dynamics of the nanoparticles prevail over those of the polymer matrix, which is the case of nanocomposites at high filler contents.
Lingua originaleEnglish
pagine (da-a)102-110
Numero di pagine9
RivistaPolymer
Volume73
Stato di pubblicazionePublished - 2015

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Organoclay
Nylons
Rheology
Polyamides
Nanocomposites
Polymers
Degradation
Polymer matrix
Large scale systems
Spectroscopy
Nanoparticles
Time measurement
Ionization
Hot Temperature
Fillers
Desorption
Clay
Oxidation
Kinetics
Lasers

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

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title = "Time-resolved rheology as a tool to monitor the progress of polymer degradation in the melt state - Part II: Thermal and thermo-oxidative degradation of polyamide 11/organo-clay nanocomposites",
abstract = "Abstract Thermal and thermo-oxidative degradation of nanocomposites based on polyamide 11 (PA11) and organo-modified clay (Cloisite{\circledR} 30B) are studied in the melt state (T = 215 °C) via time-resolved mechanical spectroscopy (TRMS). The goal is assessing the potentiality of rheological analysis for studying polymer degradation in complex systems such as polymer nanocomposites, whose rheological response stems from the combination of the contributions of polymer and nanoparticles. We prove that a thorough analysis grounded on TRMS allows to isolate the effect of degradation of the polymer matrix, whose progress can be hence profitably monitored. Essentially the same degradation mechanisms as in neat PA11 are identified for the nanocomposite, but the kinetics of the thermo-oxidation processes are much faster in the presence of organo-clay. In particular, rheology promptly identifies cross-linking reactions since the early stage of the treatment in air. Matrix-assisted laser desorption/ionization and oxidative induction time measurements corroborate the conclusions drawn on the basis of rheological analyses, shedding light on the chemical aspects of PA11 degradation. Overall, rheological analysis confirms to be a valuable tool for monitoring polymer degradation even in case of inherently complex systems such as nanocomposites. In this case, however, the analysis can be difficult if the dynamics of the nanoparticles prevail over those of the polymer matrix, which is the case of nanocomposites at high filler contents.",
keywords = "MALDI-TOF, Nanocomposite, Organic Chemistry, Organo-clay, Polyamide 11, Polymers and Plastics, Rheology, Thermal degradation, Thermo-oxidative degradation",
author = "Dintcheva, {Nadka Tzankova} and Filippone and Curcuruto and Gambarotti and Carroccio and Passaglia",
year = "2015",
language = "English",
volume = "73",
pages = "102--110",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Time-resolved rheology as a tool to monitor the progress of polymer degradation in the melt state - Part II: Thermal and thermo-oxidative degradation of polyamide 11/organo-clay nanocomposites

AU - Dintcheva, Nadka Tzankova

AU - Filippone, null

AU - Curcuruto, null

AU - Gambarotti, null

AU - Carroccio, null

AU - Passaglia, null

PY - 2015

Y1 - 2015

N2 - Abstract Thermal and thermo-oxidative degradation of nanocomposites based on polyamide 11 (PA11) and organo-modified clay (Cloisite® 30B) are studied in the melt state (T = 215 °C) via time-resolved mechanical spectroscopy (TRMS). The goal is assessing the potentiality of rheological analysis for studying polymer degradation in complex systems such as polymer nanocomposites, whose rheological response stems from the combination of the contributions of polymer and nanoparticles. We prove that a thorough analysis grounded on TRMS allows to isolate the effect of degradation of the polymer matrix, whose progress can be hence profitably monitored. Essentially the same degradation mechanisms as in neat PA11 are identified for the nanocomposite, but the kinetics of the thermo-oxidation processes are much faster in the presence of organo-clay. In particular, rheology promptly identifies cross-linking reactions since the early stage of the treatment in air. Matrix-assisted laser desorption/ionization and oxidative induction time measurements corroborate the conclusions drawn on the basis of rheological analyses, shedding light on the chemical aspects of PA11 degradation. Overall, rheological analysis confirms to be a valuable tool for monitoring polymer degradation even in case of inherently complex systems such as nanocomposites. In this case, however, the analysis can be difficult if the dynamics of the nanoparticles prevail over those of the polymer matrix, which is the case of nanocomposites at high filler contents.

AB - Abstract Thermal and thermo-oxidative degradation of nanocomposites based on polyamide 11 (PA11) and organo-modified clay (Cloisite® 30B) are studied in the melt state (T = 215 °C) via time-resolved mechanical spectroscopy (TRMS). The goal is assessing the potentiality of rheological analysis for studying polymer degradation in complex systems such as polymer nanocomposites, whose rheological response stems from the combination of the contributions of polymer and nanoparticles. We prove that a thorough analysis grounded on TRMS allows to isolate the effect of degradation of the polymer matrix, whose progress can be hence profitably monitored. Essentially the same degradation mechanisms as in neat PA11 are identified for the nanocomposite, but the kinetics of the thermo-oxidation processes are much faster in the presence of organo-clay. In particular, rheology promptly identifies cross-linking reactions since the early stage of the treatment in air. Matrix-assisted laser desorption/ionization and oxidative induction time measurements corroborate the conclusions drawn on the basis of rheological analyses, shedding light on the chemical aspects of PA11 degradation. Overall, rheological analysis confirms to be a valuable tool for monitoring polymer degradation even in case of inherently complex systems such as nanocomposites. In this case, however, the analysis can be difficult if the dynamics of the nanoparticles prevail over those of the polymer matrix, which is the case of nanocomposites at high filler contents.

KW - MALDI-TOF

KW - Nanocomposite

KW - Organic Chemistry

KW - Organo-clay

KW - Polyamide 11

KW - Polymers and Plastics

KW - Rheology

KW - Thermal degradation

KW - Thermo-oxidative degradation

UR - http://hdl.handle.net/10447/154027

UR - http://www.journals.elsevier.com/polymer/

M3 - Article

VL - 73

SP - 102

EP - 110

JO - Polymer

JF - Polymer

SN - 0032-3861

ER -