D thermoplastic matrix composites

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Consolidation of Thermoplastic Laminates
W Grouve, R Akkerman (Univ of Twente)
The consolidation process of thermoplastic laminates is affected by pressure, temperature and time. Experiments with film stacking indicate that this process can be divided into different stages. A physical model is being developed to predict the consolidation quality as a function of the process parameters. (D12:1)

Thermoplastic Matrix Towpreg Production
J Silva (ISEP) J Nunes, J Velosa, C Bernardo (Minho Univ) A Marques (Univ of Porto)
This work establishes the process windows for efficient towpreg production on a developed powder coating equipment. Three different thermoplastic towpregs were studied: one for demanding markets (carbon fibre/Primospire) and others for commercial applications (glass/polypropylene and glass/PVC). Mechanical properties of compression moulded composites made from the produced towpregs were also obtained. (D12:2)
Numerical Simulation of the Microscale Impregnation in Commingled Thermoplastic Composite YARNS
A Maffezzoli, R Gennaro, A Greco, F Lionetto (Univ of Salento)
A finite element method was applied to study the through thickness flow of an amorphous polyetylene-terephtalate (PETg) matrix while impregnating a dry glass fiber. The rheological behaviour of the thermoplastic matrix was used to predict the permeability of a randomly spaced unidirectional fiber array. (D12:3)

Influencing Factors for an Online Consolidating Thermoplastic Tape Placement Process
MA Khan, R Schledjewski (Institut für Verbundwerkstoffe GmbH)
Process parameter effects like heating, process velocity, consolidation force and tool temperature were studied in term of final mechanical strength and porosity contents. Simulations were performed to predict and to improve the process. Material properties were found to support the simulation and manufacturing process. (D12:4)

Toughening of In Situ Polymerized CBT by a Non-Isothermal Production Method
J Baets, I Verpoest (KU Leuven), J Devaux (Univ Catholique de Louvain-la-Neuve)
In-situ polymerization is a promising technique for the use of thermoplastics in continuous fiber reinforced composites. In this paper the advantages of a non-isothermal production of polymerized cyclic butyleneterephthalate are shown. When a fast cooling is applied the produced matrix is much tougher than with slow cooling. (D12:5)

Bladder Molding of Double Wall Fibre Reinforced Thermoplastic Material.
A Salomi*, A Greco, A Maffezzoli (Univ di Lecce) O Manni (* also at Consorzio CETMA) (*also at TELCOM Spa)
In this work, a process for manufacturing double wall component with continuous fiber reinforced polymer was studied. The process is based on bladder molding of thermoplastic matrix composite. Commingled woven fabric was used as reinforcement. (d12:6)



PES Solvent Resistance Enhanced By Nanosized Particles
M Aurilia, E Milella (IMAST) L Sorrentino, ML Fariello, S Iannace (CNR-IMCB)


Influence of Temperature on the Behavior of Carbon Fiber Fabrics Reinforced PPS Laminates
J Aucher, B Vieille, L Taleb (INSA Rouen)
This work aims at investigating the mechanical behavior of carbon fiber fabrics reinforced polyphenylenesulfide (PPS) laminates submitted to different stress states at different temperatures (23°C and 120°C) : tensile test, Open-Hole tension test, singlebolt double lap joint and single-bolt single lap joint tests. (D12:8)

Unidirectional Carbon Fibre Reinforced Polyvinylidene Fluoride: Impact of Atmospheric Plasma on Composite Performance
K Ho, M Laffan, S Shamsuddin, S Lamoriniere, A Bismarck (Imperial College London)
Unidirectional carbon fibre reinforced polyvinylidene fluoride (PVDF) composites was manufactured with inline continuous atmospheric plasma fluorination (APF). Laminated composites were mechanically tested and results show significant improvement in interface dominated properties as a result of the introduction of fluorine functionalities to the surface of the reinforcing fibre. (D12:9)
Developing the Next Generation of Polyethylene Based Single Polymer Composites
I Ward, P Hine, A Unwin (Polymer & Complex Fluids Group)

Carbon/PP Composites and Carbon/Self-Reinforced PP Hybrid Composites

J Ustarroz, I Taketa, SV Lomov, I Verpoest (KU Leuven)
Carbon/PP composites and carbon/self-reinforced PP hybrid composites have been produced by film stacking. Tensile results on single composites have shown that good impregnation is achieved, leading to the expected tensile performance. An increase in failure strain of about 30% is realized in hybrids, overcoming the brittleness of carbon composites. (D12:11)

Prediction and Video Tracking of Damage Accumulation in Hybrid Thermoplastic Composite Structures

R Brooks, M Johnson, XB Liu, A Long (Univ of Nottingham)
Damage accumulation in hybrid commingled fabric/GMT thermoplastic composites has been modelled with elastically damaging material models using FE analysis. The good accuracy of damage prediction has been confirmed by identifying with key events observed during video tracking and in the load-deflection data obtained during testing. (D12:12)

Engineering the Damping Properties of Multilayer Thermoplastic Composite
F Berardini (Univ of Naples Frederico II) S Iannace (IMCB-CNR) G Nocerino (ELASIS)

Thermoplastic composites consisting of a micro/nano-composite matrix reinforced with woven glass fibres were developed. Different filler compositions were used with the aim of designing the viscoelastic properties of the composites, characterized by layers of glass fibre reinforced thermoplastics and micro/nano reinforced PP and PC/ABS matrices. (D12:13)

Modeling the Visosity and Conversion of in-situ Polymerizing PBT using Empirical Data
M Steeg, P Mitschang (Institut für Verbundwerkstoffe GmbH) T Hartmann (Cyclics Europe GmbH)
Heading towards faster cycle times for continuous fiber-reinforced thermoplastic parts, highly viscous matrices and dense packed textile structures hinder the breakthrough. To overcome these limitations, reactive polymers, such as Cyclic Butylene Terephthalate make a contribution having very low processing viscosities. Modeling the viscosity and conversion are performed on an empirical data base. (D12:14)

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