Dynamic mechanical characterization of PMR polyimide/carbon fiber composites modified by fiber coating with silicones

Labronici, Marcos; Ishida, Hatsuo

doi:10.1163/156855498x00180

Cited by 12 publications

(13 citation statements)

References 23 publications

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“…The local properties, such as thermal, mechanical, chemical, and morphological characteristics are different from the ones of the surrounding bulk matrix. Nowadays, the existence of a transition region between fibre and matrix is widely accepted and new characterization methods revealed locally different properties within a region of a few tens to a few hundreds of nanometers [1][2][3][4][5]. Sizing chemistry and interdiffusion play a great part in the development of interphases, which have been investigated in our earlier work [5].…”

Section: Introductionmentioning

confidence: 94%

“…Sizing chemistry and interdiffusion play a great part in the development of interphases, which have been investigated in our earlier work [5]. When the sizing layer becomes the 'weak point' of the system, failure occurs within it [4,6,7]. Considering GF sizings, which commonly amount to 0.5-1% of the fibre weight [8], their formulation consists of mainly three constituents: organofunctional silanes, polymeric film formers, and processing aids.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the effects of different fibre treatments, including the application of different silanes, film formers and coatings have been studied and related to the mechanical properties of the composites [24][25][26][27]. Regarding the local extension of the interphase, it was mentioned that increasing the interphases thickness could turn them into 'weak spots' with regard to the mechanical performance of the composites [4,6]. However, the interphase related properties do not solely depend on the local extension of the interphase, but rather depend on a complex interplay of many factors.…”

Section: Introductionmentioning

confidence: 99%

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Systematically varied interfaces of continuously reinforced glass fibre/polypropylene composites: Comparative evaluation of relevant interfacial aspects

Rausch¹,

Zhuang²,

Maeder³

2010

Express Polym. Lett.

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Abstract.Interface related mechanical properties of unidirectional continuous glass fibre (GF)/polypropylene (PP) composites made of commingled yarns have been systematically studied according to a three level, three-factor factorial design. The three systematically varied factors comprised different silane coupling agent and film former contents in GF sizings as well as a varying GF diameter. Besides the statistical evaluation of those main effects on the transverse tensile and compression shear strengths of the composites, interfacial shear strength measurements on model composites have been performed. The latter ones as well as the results of the dynamic mechanical thermal analysis support the statistical significance of sizing components, the sizing content on the GF, and GF diameter for the mechanical properties of the composites. This highlights the interplay of proper sizing formulation and reproducible GF-spinning conditions, as both affect the interfacial bonding of continuously reinforced GF/PP composites.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Systematically varied interfaces of continuously reinforced glass fibre/polypropylene composites: Comparative evaluation of relevant interfacial aspects

Rausch¹,

Zhuang²,

Maeder³

2010

Express Polym. Lett.

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“…The cure accelerates around the imidization temperature. The extent of cure of the cumulatively cured sample in the imidization temperature re- [39] and polymeric composites [40,41] but also at the interface or sizing interphase [42][43][44] between fiber and matrix in a composite system. Also, the reaction behavior can be observed using this method, because changing thermal conditions can change molecular states during the transformation from amide acid to fully cured polyimide.…”

Section: Curing Behavior Of Peti-5 [23]mentioning

confidence: 99%

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Cho

Drzal²

2016

Carbon letters

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In efforts to characterize and understand the properties and processing of phenylethynylterminated imide (LaRC PETI-5, simply referred to as PETI-5) oligomers and polymers as a high-temperature sizing material for carbon fiber-reinforced polymer matrix composites, PETI-5 imidization and thermal curing behaviors have been extensively investigated based on the phenylethynyl end-group reaction. These studies are reviewed here. In addition, the use of PETI-5 to enhance interfacial adhesion between carbon fibers and a bismaleimide (BMI) matrix, as well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated poly(butadiene-co-acrylonitrile) (ATBN)-coated xGnP particles incorporated into epoxy resin on the toughness of xGnP/epoxy composites is examined in terms of its impact on Izod strength. This paper provides an extensive overview from fundamental studies on PETI-5 and xGnP, as well as applied studies on relevant composite materials.Key words: polyimide, exfoliated graphite nanoplatelets, carbon fiber, composite, properties Phenylethynyl-Terminated Imide PolymerPolyimides have been extensively used in the electronics industry [1] as coatings, films, or adhesives and also in composite applications [2] as a primary or secondary structural material. When incorporated with organic or inorganic fibers, including carbon fibers and glass fibers, they can potentially be applied as a sizing material for high-temperature uses. In advanced applications, one of the most desirable advantages of polyimides, especially the aromatic polyimides, is their excellent high-temperature performance. Their thermal characteristics, including high temperature stability and cure behavior, are critical to successful processing and to the final properties of the resulting polyimide. For aerospace and aircraft applications, advanced polymer materials must successfully maintain their properties at high service temperatures over a long exposure time [3][4][5].The important parameters influencing the heat resistance of a polymeric material are its glass transition temperature (T g ), melting point (T m ), thermal stability, and etc., which may depend on its thermal history. Accordingly, polymers that are used to fulfill such high temperature performance should exhibit a high T g or T m and have excellent thermal stability. Even though some polyimides meet the high temperature requirement, their uses have been limited due to processing difficulties, such as poor solubility in common solvents, the release of volatiles, brittleness, and high processing temperature [6,7].Aromatic polyimides, especially acetylene or ethynyl-terminated polyimides, have been extensiv...

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“…Results of using the DMA technique to characterise interfacial effects in particulate and fibre-reinforced polymer composites have been reported in the literature [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Most of the studies were carried out in temperature sweeps at fixed frequencies (isochronal conditions) near transition regions of the matrix, specially covering the glass transition region.…”

Section: Introductionmentioning

confidence: 99%

Interfacial studies of carbon fibre / polycarbonate composites using dynamic mechanical analysis

Paiva

Mano

2005

E-Polymers

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Unidirectional composite material samples with ultrahigh modulus carbon fibres, treated and untreated by oxygen plasma, and a polycarbonate matrix were prepared and tested. Dynamic mechanical analysis (DMA) was used to study interfacial fibre/matrix interaction and the fragmentation test method was applied to determine interfacial shear strength. For the composite samples with treated carbon fibres, analyzed by DMA, a consistent shift of the loss modulus peak toward higher temperature was observed. The damping ratio was highly affected by residual stresses along the carbon fibre direction due to the large difference of thermal expansion coefficients of matrix and fibres. Critical fibre length and interfacial shear strength, obtained from the fragmentation test, showed substantial improvement for treated fibres as compared to the untreated ones. Plasma oxidation of the fibre surface improved considerably the fibre-matrix interaction. Care must be taken interpreting the DMA results, due to specific characteristics of the system studied.

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Dynamic mechanical characterization of PMR polyimide/carbon fiber composites modified by fiber coating with silicones

Cited by 12 publications

References 23 publications

Systematically varied interfaces of continuously reinforced glass fibre/polypropylene composites: Comparative evaluation of relevant interfacial aspects

Systematically varied interfaces of continuously reinforced glass fibre/polypropylene composites: Comparative evaluation of relevant interfacial aspects

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Interfacial studies of carbon fibre / polycarbonate composites using dynamic mechanical analysis

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