Understanding the impact performance of injection moulded long fibre reinforced polyamide

Research output: Contribution to conferencePaper

Abstract

Short fibre reinforced thermoplastics have been used in the automotive industry for many years and there has recently been a strong growth in the use of polyamide based materials in under-the-hood applications. More recently there has been an increasing growth in the use of long fibre thermoplastic composite systems in semi-structural and engineering applications. Glass fibre reinforced polyamides are excellent composite materials in terms of their high levels of mechanical performance and temperature resistance. However the mechanical properties of polyamide based composites decrease markedly upon the absorption of water and other polar fluids. There also exist a number of well documented differences in the structure performance relationships of short fibre reinforced polyamide and polypropylene composites and it can be expected that there will also be differences when we compare these resins reinforced with long fibres. In this paper we present data on the mechanical performance of long fibre reinforced polyamide 6,6 which may be relevant to the above discussion. We have prepared injection moulded long fibre reinforced polyamide 6,6 samples with a range of glass contents (0-50 % wt) using glass fibres having average fibre diameters of 10, 14, and 17 μm. Mechanical performance has been determined for both "dry as moulded" state and after hydrolytic conditioning and compared with reference short fibre composites based on 10 μm diameter fibre in the same resin system. We will focus our discussion on the effects of fibre length, fibre diameter and fibre concentration on the impact performance of these composites. We will show how it is important to discriminate between notched (Figure 1) and unnotched (Figure 2) testing when discussing impact performance as these two properties show very different structure-performance relationships.
LanguageEnglish
Number of pages2
Publication statusPublished - 2 Jun 2008
Event13th European Conference on Composite Materials (EECM 13) - Stockholm, Sweden
Duration: 2 Jun 20085 Jun 2008

Conference

Conference13th European Conference on Composite Materials (EECM 13)
CityStockholm, Sweden
Period2/06/085/06/08

Fingerprint

Nylons
Polyamides
Fibers
Composite materials
Glass fibers
Thermoplastics
Resins
Polypropylenes
Automotive industry
Large scale systems
Glass
Mechanical properties

Keywords

  • impact performance
  • injection moulded long fibre reinforced polyamide
  • reinforced polyamide
  • composites
  • mechanical engineering
  • fibre length
  • fibre diameter
  • fibre content
  • injection moulding

Cite this

Thomason, J. L. (2008). Understanding the impact performance of injection moulded long fibre reinforced polyamide. Paper presented at 13th European Conference on Composite Materials (EECM 13), Stockholm, Sweden, .
Thomason, J.L. / Understanding the impact performance of injection moulded long fibre reinforced polyamide. Paper presented at 13th European Conference on Composite Materials (EECM 13), Stockholm, Sweden, .2 p.
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Thomason, JL 2008, 'Understanding the impact performance of injection moulded long fibre reinforced polyamide' Paper presented at 13th European Conference on Composite Materials (EECM 13), Stockholm, Sweden, 2/06/08 - 5/06/08, .

Understanding the impact performance of injection moulded long fibre reinforced polyamide. / Thomason, J.L.

2008. Paper presented at 13th European Conference on Composite Materials (EECM 13), Stockholm, Sweden, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Understanding the impact performance of injection moulded long fibre reinforced polyamide

AU - Thomason, J.L.

PY - 2008/6/2

Y1 - 2008/6/2

N2 - Short fibre reinforced thermoplastics have been used in the automotive industry for many years and there has recently been a strong growth in the use of polyamide based materials in under-the-hood applications. More recently there has been an increasing growth in the use of long fibre thermoplastic composite systems in semi-structural and engineering applications. Glass fibre reinforced polyamides are excellent composite materials in terms of their high levels of mechanical performance and temperature resistance. However the mechanical properties of polyamide based composites decrease markedly upon the absorption of water and other polar fluids. There also exist a number of well documented differences in the structure performance relationships of short fibre reinforced polyamide and polypropylene composites and it can be expected that there will also be differences when we compare these resins reinforced with long fibres. In this paper we present data on the mechanical performance of long fibre reinforced polyamide 6,6 which may be relevant to the above discussion. We have prepared injection moulded long fibre reinforced polyamide 6,6 samples with a range of glass contents (0-50 % wt) using glass fibres having average fibre diameters of 10, 14, and 17 μm. Mechanical performance has been determined for both "dry as moulded" state and after hydrolytic conditioning and compared with reference short fibre composites based on 10 μm diameter fibre in the same resin system. We will focus our discussion on the effects of fibre length, fibre diameter and fibre concentration on the impact performance of these composites. We will show how it is important to discriminate between notched (Figure 1) and unnotched (Figure 2) testing when discussing impact performance as these two properties show very different structure-performance relationships.

AB - Short fibre reinforced thermoplastics have been used in the automotive industry for many years and there has recently been a strong growth in the use of polyamide based materials in under-the-hood applications. More recently there has been an increasing growth in the use of long fibre thermoplastic composite systems in semi-structural and engineering applications. Glass fibre reinforced polyamides are excellent composite materials in terms of their high levels of mechanical performance and temperature resistance. However the mechanical properties of polyamide based composites decrease markedly upon the absorption of water and other polar fluids. There also exist a number of well documented differences in the structure performance relationships of short fibre reinforced polyamide and polypropylene composites and it can be expected that there will also be differences when we compare these resins reinforced with long fibres. In this paper we present data on the mechanical performance of long fibre reinforced polyamide 6,6 which may be relevant to the above discussion. We have prepared injection moulded long fibre reinforced polyamide 6,6 samples with a range of glass contents (0-50 % wt) using glass fibres having average fibre diameters of 10, 14, and 17 μm. Mechanical performance has been determined for both "dry as moulded" state and after hydrolytic conditioning and compared with reference short fibre composites based on 10 μm diameter fibre in the same resin system. We will focus our discussion on the effects of fibre length, fibre diameter and fibre concentration on the impact performance of these composites. We will show how it is important to discriminate between notched (Figure 1) and unnotched (Figure 2) testing when discussing impact performance as these two properties show very different structure-performance relationships.

KW - impact performance

KW - injection moulded long fibre reinforced polyamide

KW - reinforced polyamide

KW - composites

KW - mechanical engineering

KW - fibre length

KW - fibre diameter

KW - fibre content

KW - injection moulding

UR - https://www.swerea.se/ivf

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M3 - Paper

ER -

Thomason JL. Understanding the impact performance of injection moulded long fibre reinforced polyamide. 2008. Paper presented at 13th European Conference on Composite Materials (EECM 13), Stockholm, Sweden, .