Examination of a coating layer on glass fibre used as reinforcing material in a polyepoxide matrix: Characterization by FTIR spectroscopy and vapour phase interaction studies with monofunctional model compounds

AbstractA novel combination of depth-sensing nano-indentation, micro-indentation and micro-FTIR techniques is employed towards understanding the durability of coating layers used on engineering thermoplastics upon exposure to harsh weathering environments. This combination of techniques enables study of changes in surface-to-bulk properties in the clearcoat-substrate system upon weathering; typically observed as a degradation starting from the surface and then proceeding inwards to the bulk of the material. Nano-indentation measurements carried out to understand the mechanical properties of the coating layer provide insights into the changes in hardness and modulus upon prolonged weathering exposure. Depth-sensing micro-indentation and micro-FTIR spectroscopy studies performed to evaluate mechanical performance and chemical changes, respectively, explain the influence of the substrate on the coating layer, especially at the interface upon weathering. This unique combination of depth-sensing indentation and micro-FTIR spectroscopy has led to an understanding of the properties of the coating layer and the substrate individually as well as an integral system as a function of weathering exposure time. Finally, the physico-chemical properties of the coating and substrate are linked to performance prediction, enabling optimization of coating-substrate combinations.

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Characterization of the coating layer on glass fibre used as reinforcement in polyepoxyde matrix

Makromolekulare Chemie Macromolecular Symposia ◽

10.1002/masy.19890230125 ◽

1989 ◽

Vol 23 (1) ◽

pp. 291-298

Author(s):

Marcelle Escoubes ◽

Bernard Chabert ◽

Jacques Chauchard ◽

Guy Nemoz

Keyword(s):

Glass Fibre ◽

Coating Layer

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Synthesis of Some m-Substituted 1-Phenyl-6-azauracils

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19942741 ◽

1994 ◽

Vol 59 (12) ◽

pp. 2741-2746 ◽

Cited By ~ 4

Author(s):

Jan Slouka ◽

Vojtěch Bekárek ◽

Jan Hlaváč

Keyword(s):

Hydrogen Bonds ◽

Benzene Ring ◽

Starting Material ◽

Model Compounds ◽

Interaction Studies ◽

Substituted 1

Many 1-aryl-6-azauracils derivatives were prepared so far, among them the representation of m-substituted 1-phenyl derivatives is relatively poor. In this communication we report on the synthesis of the starting material - dicarbamate I, which was used for the preparation of some new 1-phenyl-6-azauracil derivatives II, containing simple nitrogeneous group in m-position. We focused also on the compounds III having two 6-azauracil rings mutually bonded in m-position to the benzene ring. These compounds can form hydrogen bonds simultaneously with two bonding centres of fitted substrate and so they can serve as model compounds for the interaction studies. From this type of compounds the dinitrile IIIa is known so far.

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Shock Interaction Studies on Glass Fibre Reinforced Epoxy Matrix Composites

29th International Symposium on Shock Waves 1 ◽

10.1007/978-3-319-16835-7_18 ◽

2015 ◽

pp. 127-134 ◽

Cited By ~ 1

Author(s):

K. P. J. Reddy ◽

G. Jagadeesh ◽

V. Jayaram ◽

B. Harinath Reddy ◽

V. Madhu ◽

...

Keyword(s):

Glass Fibre ◽

Epoxy Matrix ◽

Shock Interaction ◽

Matrix Composites ◽

Interaction Studies ◽

Glass Fibre Reinforced

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Glass Fibre as a Reinforcing Material for Composites

Indian Journal of Pure & Applied Biosciences ◽

10.18782/2582-2845.7536 ◽

2020 ◽

Vol 8 (2) ◽

pp. 114-126

Author(s):

Prakash Chaudhary ◽

Keyword(s):

Glass Fibre ◽

Reinforcing Material

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Characterization of GaAs/AlGaAs quantum wells and quantum wires by chemical lattice imaging

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100171419 ◽

1994 ◽

Vol 52 ◽

pp. 736-737

Author(s):

A. Carlsson ◽

J.-O. Malm ◽

A. Gustafsson

Keyword(s):

Quantum Well ◽

Quantum Wells ◽

Quantum Wires ◽

Vapour Phase ◽

Quantitative Information ◽

Lattice Imaging ◽

Vapour Phase Epitaxy ◽

Metalorganic Vapour Phase Epitaxy ◽

High Resolution Images

In this study a quantum well/quantum wire (QW/QWR) structure grown on a grating of V-grooves has been characterized by a technique related to chemical lattice imaging. This technique makes it possible to extract quantitative information from high resolution images.The QW/QWR structure was grown on a GaAs substrate patterned with a grating of V-grooves. The growth rate was approximately three monolayers per second without growth interruption at the interfaces. On this substrate a barrier of nominally Al0.35 Ga0.65 As was deposited to a thickness of approximately 300 nm using metalorganic vapour phase epitaxy . On top of the Al0.35Ga0.65As barrier a 3.5 nm GaAs quantum well was deposited and to conclude the structure an additional approximate 300 nm Al0.35Ga0.65 As was deposited. The GaAs QW deposited in this manner turns out to be significantly thicker at the bottom of the grooves giving a QWR running along the grooves. During the growth of the barriers an approximately 30 nm wide Ga-rich region is formed at the bottom of the grooves giving a Ga-rich stripe extending from the bottom of each groove to the surface.

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