Details
| Original language | English |
|---|---|
| Pages (from-to) | 721-738 |
| Number of pages | 18 |
| Journal | Applied composite materials |
| Volume | 31 |
| Issue number | 2 |
| Early online date | 22 Dec 2023 |
| Publication status | Published - Apr 2024 |
Abstract
Binders are known to influence the different steps in liquid composite molding process chains. Most reseach focuses on powder binder and veils. Spray binders are rarely studied. Therefore, the effect of an epoxy spray binder on the infusion and cure steps of liquid composite molding processes is studied in this paper. Permeability measurements, solubility tests and measurements of glass transition temperature, resin cure time and resin viscosity show a complex interaction between binder and resin depending on the process conditions. The binder mostly increased the permeability of the tested preforms. This effect increases with increasing binder loading. At low fiber volume fractions the binder had a positive effect on preform permeability, most likely by to delaying the closure of macro flow channels or textile inhomogeneity. The binder did not dissolve in the resin until temperatures of around 120 °C, while remaining as a separate phase at 22 °C, 40 and 80 °C. This has to be considered when defining the cure profile of the resin, as the binder is expected to participate in the cure reaction. The glass transition temperature remained unchanged for the binder-resin combination used. An increase in viscosity by a factor of 1.5-2 was observed when the binder was dissolved in the resin. Samples with dissolved binder cured slightly faster than pure resin. The experimental results were theoretically transferred to real infusion processes.
Keywords
- Binder, Composites, Fiber-reinforced Plastics, Infusion, Permeability
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
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In: Applied composite materials, Vol. 31, No. 2, 04.2024, p. 721-738.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of Epoxy Spray Binder on Infusion and Cure in Liquid Composite Molding Processes
AU - Möllers, Hendrik
AU - Schmidt, Carsten
AU - Meiners, Dieter
N1 - Funding Information: The authors would like to thank the federal state of Lower Saxony and the European Regional Development Fund (ERDF) for financial and organizational support of the project AutoBLADE. The binder was supplied free of charge by CTP Advanced Materials.
PY - 2024/4
Y1 - 2024/4
N2 - Binders are known to influence the different steps in liquid composite molding process chains. Most reseach focuses on powder binder and veils. Spray binders are rarely studied. Therefore, the effect of an epoxy spray binder on the infusion and cure steps of liquid composite molding processes is studied in this paper. Permeability measurements, solubility tests and measurements of glass transition temperature, resin cure time and resin viscosity show a complex interaction between binder and resin depending on the process conditions. The binder mostly increased the permeability of the tested preforms. This effect increases with increasing binder loading. At low fiber volume fractions the binder had a positive effect on preform permeability, most likely by to delaying the closure of macro flow channels or textile inhomogeneity. The binder did not dissolve in the resin until temperatures of around 120 °C, while remaining as a separate phase at 22 °C, 40 and 80 °C. This has to be considered when defining the cure profile of the resin, as the binder is expected to participate in the cure reaction. The glass transition temperature remained unchanged for the binder-resin combination used. An increase in viscosity by a factor of 1.5-2 was observed when the binder was dissolved in the resin. Samples with dissolved binder cured slightly faster than pure resin. The experimental results were theoretically transferred to real infusion processes.
AB - Binders are known to influence the different steps in liquid composite molding process chains. Most reseach focuses on powder binder and veils. Spray binders are rarely studied. Therefore, the effect of an epoxy spray binder on the infusion and cure steps of liquid composite molding processes is studied in this paper. Permeability measurements, solubility tests and measurements of glass transition temperature, resin cure time and resin viscosity show a complex interaction between binder and resin depending on the process conditions. The binder mostly increased the permeability of the tested preforms. This effect increases with increasing binder loading. At low fiber volume fractions the binder had a positive effect on preform permeability, most likely by to delaying the closure of macro flow channels or textile inhomogeneity. The binder did not dissolve in the resin until temperatures of around 120 °C, while remaining as a separate phase at 22 °C, 40 and 80 °C. This has to be considered when defining the cure profile of the resin, as the binder is expected to participate in the cure reaction. The glass transition temperature remained unchanged for the binder-resin combination used. An increase in viscosity by a factor of 1.5-2 was observed when the binder was dissolved in the resin. Samples with dissolved binder cured slightly faster than pure resin. The experimental results were theoretically transferred to real infusion processes.
KW - Binder
KW - Composites
KW - Fiber-reinforced Plastics
KW - Infusion
KW - Permeability
UR - http://www.scopus.com/inward/record.url?scp=85180260311&partnerID=8YFLogxK
U2 - 10.1007/s10443-023-10189-7
DO - 10.1007/s10443-023-10189-7
M3 - Article
AN - SCOPUS:85180260311
VL - 31
SP - 721
EP - 738
JO - Applied composite materials
JF - Applied composite materials
SN - 0929-189X
IS - 2
ER -