The effects of molecular weight and polymorphism on the fracture and thermo-mechanical properties of a carbon-fibre composite modified by electrospun poly (vinylidene fluoride) membranes

Polymer ◽  
2010 ◽  
Vol 51 (12) ◽  
pp. 2585-2596 ◽  
Author(s):  
K. Magniez ◽  
C. De Lavigne ◽  
B.L. Fox
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Carbon Fibre ◽  
Vinylidene Fluoride ◽  
Fibre Composite ◽  
Carbon Fibre Composite ◽  
Poly Vinylidene Fluoride

scholarly journals Properties of a Carbon-Fibre Composite Modified by Electrospun Poly (Vinylidene Fluoride)

2010 ◽  
Author(s):  
K. Magniez ◽  
C. De Lavigne ◽  
B. L. Fox ◽  
A. D’Amore ◽  
Domenico Acierno ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Vinylidene Fluoride ◽  
Fibre Composite ◽  
Carbon Fibre Composite ◽  
Poly Vinylidene Fluoride

scholarly journals Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials

2020 ◽  
Author(s):  
◽  
Rebecca A. Blows
Keyword(s):  
Mechanical Properties ◽  
Phase Separation ◽  
Composite Materials ◽  
Carbon Fibre ◽  
Moisture Absorption ◽  
Fibre Composite ◽  
Image Correlation ◽  
Resin Matrix ◽  
Carbon Fibre Composite ◽  
Carbon Fibre Composites

The increasing popularity of carbon fibre reinforced polymers means that enhancement of material properties is of high commercial value. Thin-ply technology is one area of research focussed on achieving this goal. The aim of this work was to investigate the use of thin-ply technology by studying the effect of ply thickness on the physical and mechanical properties of carbon fibre composite materials, after exposure to various environmental conditions. A review of mechanical properties at ambient conditions and after exposure to both high temperature and moisture was conducted. Quasi-isotropic thin-ply carbon fibre composites were found to have enhanced mechanical properties, compared to thicker ply materials comprising the same resin and matrix, under various loading conditions. One of the main mechanisms for this is thought to be the lower interfacial stresses seen with thin-ply materials, as demonstrated through the use of high-speed camera video recording and digital image correlation. An investigation into the effect of ply thickness on moisture absorption and diffusion rate was also conducted. For the material under investigation, diffusion rates remained constant with changes to ply thickness, whereas moisture absorption was greater for the thinner ply material. In addition, the effect of ply thickness on viscoelastic properties was also studied. The use of dynamic mechanical analysis suggested that the material under investigation tended to a two-phase state. This is thought to be the result of phase-separation of the epoxy resin matrix and poly-ether-sulfone (PES) toughening particles. Ply thickness was shown to have some effect on the phase separation of epoxy and PES.

scholarly journals Comparative Study of PVDF Sheets and Their Sensitivity to Mechanical Vibrations: The Role of Dimensions, Molecular Weight, Stretching and Poling

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1637
Author(s):  
Miroslav Mrlík ◽  
Josef Osička ◽  
Martin Cvek ◽  
Markéta Ilčíková ◽  
Peter Srnec ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Comparative Study ◽  
Vinylidene Fluoride ◽  
Initial Thickness ◽  
Complementary Method ◽  
Β Phase ◽  
Vibration Sensing ◽  
Poly Vinylidene Fluoride ◽  
Processing Techniques ◽  
The Comparative Study

This paper is focused on the comparative study of the vibration sensing capabilities of poly(vinylidene fluoride) (PVDF) sheets. The main parameters such as molecular weight, initial sample thickness, stretching and poling were systematically applied, and their impact on sensing behavior was examined. The mechanical properties of prepared sheets were investigated via tensile testing on the samples with various initial thicknesses. The transformation of the α-phase to the electro-active β-phase was analyzed using FTIR after applying stretching and poling procedures as crucial post-processing techniques. As a complementary method, the XRD was applied, and it confirmed the crystallinity data resulting from the FTIR analysis. The highest degree of phase transformation was found in the PVDF sheet with a moderate molecular weight (Mw of 275 kDa) after being subjected to the highest axial elongation (500%); in this case, the β-phase content reached approximately 90%. Finally, the vibration sensing capability was systematically determined, and all the mentioned processing/molecular parameters were taken into consideration. The whole range of the elongations (from 50 to 500%) applied on the PVDF sheets with an Mw of 180 and 275 kDa and an initial thickness of 0.5 mm appeared to be sufficient for vibration sensing purposes, showing a d33 piezoelectric charge coefficient from 7 pC N−1 to 9.9 pC N−1. In terms of the d33, the PVDF sheets were suitable regardless of their Mw only after applying the elongation of 500%. Among all the investigated samples, those with an initial thickness of 1.0 mm did not seem to be suitable for vibration sensing purposes.

Carbon fibre composite development for in-ground UAV’s with NACA0012 aerofoil wing

2021 ◽  
Author(s):  
Ajanas Saludheen ◽  
Firaz Muhammed Zakariya ◽  
M Ankith ◽  
Nirmal Nandakumar ◽  
Jais George ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Fibre Composite ◽  
Carbon Fibre Composite
Sign in / Sign up

Export Citation Format

Share Document