The influence of thermo-oxidative degredation on the measured interface strength of glass fibre-polypropylene

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Abstract

It has previously been found that thermal-oxidative degradation of the matrix can strongly affect the apparent interfacial shear strength (IFSS) in glass fibre-polypropylene (GF-PP) measured using the microbond method. In this work, different approaches were employed to further investigate this phenomenon. Hot-stage microscopy was used to establish a profile for dimensional loss of molten PP microdroplets during heat treatment. Under a given thermal load this reduction was found to be related to the initial droplet dimensions. A nanoindentation test was employed to directly probe the mechanical properties of the PP microdroplets, which also exhibited strong dimensional dependence in terms of property deterioration caused by the degradation. Characterisation of thermal mechanical properties and crystallinity was carried out on macroscopic PP samples to assist in elucidating how the polymer degradation affected the measured IFSS. Comparison of the degraded and non-degraded PP microbond samples for IFSS clearly showed the effect of thermal-oxidative degradation on adhesion.
LanguageEnglish
Pages1293-1300
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume42
Issue number10
Early online date19 May 2011
DOIs
Publication statusPublished - Oct 2011

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Polypropylenes
Glass fibers
Shear strength
Degradation
Mechanical properties
Nanoindentation
Thermal load
Deterioration
Molten materials
Microscopic examination
Polymers
Adhesion
Heat treatment
fiberglass
Hot Temperature
Microbond

Keywords

  • thermo-oxidative degeneration
  • glass fibre-polypropylene
  • strength
  • glass fibres
  • thermoplastic resin
  • adhesion
  • mechanical testing

Cite this

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title = "The influence of thermo-oxidative degredation on the measured interface strength of glass fibre-polypropylene",
abstract = "It has previously been found that thermal-oxidative degradation of the matrix can strongly affect the apparent interfacial shear strength (IFSS) in glass fibre-polypropylene (GF-PP) measured using the microbond method. In this work, different approaches were employed to further investigate this phenomenon. Hot-stage microscopy was used to establish a profile for dimensional loss of molten PP microdroplets during heat treatment. Under a given thermal load this reduction was found to be related to the initial droplet dimensions. A nanoindentation test was employed to directly probe the mechanical properties of the PP microdroplets, which also exhibited strong dimensional dependence in terms of property deterioration caused by the degradation. Characterisation of thermal mechanical properties and crystallinity was carried out on macroscopic PP samples to assist in elucidating how the polymer degradation affected the measured IFSS. Comparison of the degraded and non-degraded PP microbond samples for IFSS clearly showed the effect of thermal-oxidative degradation on adhesion.",
keywords = "thermo-oxidative degeneration , glass fibre-polypropylene, strength, glass fibres, thermoplastic resin, adhesion, mechanical testing",
author = "Liu Yang and James Thomason and W.Z. Zhu",
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T1 - The influence of thermo-oxidative degredation on the measured interface strength of glass fibre-polypropylene

AU - Yang, Liu

AU - Thomason, James

AU - Zhu, W.Z.

N1 - Impact Factor 2.410, Half-Life 5.2

PY - 2011/10

Y1 - 2011/10

N2 - It has previously been found that thermal-oxidative degradation of the matrix can strongly affect the apparent interfacial shear strength (IFSS) in glass fibre-polypropylene (GF-PP) measured using the microbond method. In this work, different approaches were employed to further investigate this phenomenon. Hot-stage microscopy was used to establish a profile for dimensional loss of molten PP microdroplets during heat treatment. Under a given thermal load this reduction was found to be related to the initial droplet dimensions. A nanoindentation test was employed to directly probe the mechanical properties of the PP microdroplets, which also exhibited strong dimensional dependence in terms of property deterioration caused by the degradation. Characterisation of thermal mechanical properties and crystallinity was carried out on macroscopic PP samples to assist in elucidating how the polymer degradation affected the measured IFSS. Comparison of the degraded and non-degraded PP microbond samples for IFSS clearly showed the effect of thermal-oxidative degradation on adhesion.

AB - It has previously been found that thermal-oxidative degradation of the matrix can strongly affect the apparent interfacial shear strength (IFSS) in glass fibre-polypropylene (GF-PP) measured using the microbond method. In this work, different approaches were employed to further investigate this phenomenon. Hot-stage microscopy was used to establish a profile for dimensional loss of molten PP microdroplets during heat treatment. Under a given thermal load this reduction was found to be related to the initial droplet dimensions. A nanoindentation test was employed to directly probe the mechanical properties of the PP microdroplets, which also exhibited strong dimensional dependence in terms of property deterioration caused by the degradation. Characterisation of thermal mechanical properties and crystallinity was carried out on macroscopic PP samples to assist in elucidating how the polymer degradation affected the measured IFSS. Comparison of the degraded and non-degraded PP microbond samples for IFSS clearly showed the effect of thermal-oxidative degradation on adhesion.

KW - thermo-oxidative degeneration

KW - glass fibre-polypropylene

KW - strength

KW - glass fibres

KW - thermoplastic resin

KW - adhesion

KW - mechanical testing

U2 - 10.1016/j.compositesa.2011.05.011

DO - 10.1016/j.compositesa.2011.05.011

M3 - Article

VL - 42

SP - 1293

EP - 1300

JO - Composites Part A: Applied Science and Manufacturing

T2 - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

SN - 1359-835X

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ER -