The thermal degradation of poly(phenylene sulphide)—Part 1

Peters, Olufemi A.; Still, R. H.

doi:10.1016/0141-3910(93)90023-c

Cited by 30 publications

(20 citation statements)

References 11 publications

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“…In the second explanation, transverse cracks are in general related to the internal stresses that are generated during temperature decrease after consolidation. In the commingled yarn, polymer filaments are used and it was known that filament processing step in air and at high temperature may degrade polymer quality and ductility [15][16][17]. A 3D representation of voids for sample B4 is shown in Fig.…”

Section: Commingled Fabric Laminatesmentioning

confidence: 99%

Influence of consolidation process on voids and mechanical properties of powdered and commingled carbon/PPS laminates

Patou

Bonnaire

Luycker

et al. 2019

Composites Part A: Applied Science and Manufacturing

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Relations between autoclave consolidation process, microstructure and mechanical properties of thermoplastic composite laminates were investigated. For this purpose, two different carbon fibers/PPS semi-pregs were used for laminate manufacturing: a powdered fabric and a commingled fabric with stretch broken fibers. Laminates with [0 ]6stacking sequence were consolidated in autoclave. Several consolidation levels were established by varying process parameters which are external pressure, vacuum level and consolidation duration. Microstructural characterization was performed by using matrix digestion and CT-scanning to identify void content and morphology. Laminate mechanical properties in tensile, bending, compressive and interlaminar shear were also assessed. External pressure increase by 0.5 MPa leads to void content reduction of 2.1% for powdered system and 5.4% for commingled system. The rising consolidation duration contributes slightly to void content decrease. Bending and interlaminar failure stress are the most sensitive to void level with a dependency on void size and location. Results acquired allow to identify main settings for optimized consolidation cycles which could be used for thermoplastic composite part manufacturing with complex shape.

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Section: Commingled Fabric Laminatesmentioning

confidence: 99%

Influence of consolidation process on voids and mechanical properties of powdered and commingled carbon/PPS laminates

Patou

Bonnaire

Luycker

et al. 2019

Composites Part A: Applied Science and Manufacturing

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“…There have been a few studies examining the degradation of hyperbranched polymers 8–10. Thermal degradation of linear poly(phenylene sulfide) was frequently investigated 11–17. However, one cannot find articles in the literature that discuss thermal degradation of hyperbranched poly(phenylene sulfide).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the thermal degradation of hyperbranched poly(phenylene sulfide)

Yan

Chen

Huh

et al. 2008

J of Applied Polymer Sci

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An advanced heat-resistant hyperbranched poly(phenylene sulfide) (HPPS) had been subjected to dynamic thermogravimetric analysis (TGA) in nitrogen. The presence of a single peak in the DTG cures suggested that weight loss occurs in a single stage. The thermal decomposition kinetics had been analyzed by applying the Kissinger, Friedman and Ozawa-Flynn methods. The E values determined for the hyperbranched PPS using these analyses were found to be 183.1, 189.2, 193.9 kJ mol À1 , respectively. Coats-Redfern method was used to discuss the probable degradation mechanisms. The solid-state decomposition mechanism followed by the degradation stage of HPPS was Phase boundary controlled mechanism (R 1 ).

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“…18 The melt holding temperature has been found to influence number, location, and site of the spherulites, which influence appreciably the overall rate of crystallization; composites processed at higher melting temperatures exhibited larger spherulites far from the fibers and trans-crystalline growth morphology near the fibers. 17 On the other hand, heating near or over the melting point may initiate a chemical reaction involving breaking of the C bond to the element characterizing the molecule (e.g., the CÀ ÀS bond for the PPS matrix) and crosslinking of the chains at the amorphous regions of the resin 9,10,13,19 ; it increases viscosity and makes processing of the melt difficult.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal treatment on the tensile and in‐plane shear behavior of carbon fiber‐reinforced poly(phenylene sulfide) composite specimens

Pantelakis

Katsiropoulos

Lefebure³

2007

J of Applied Polymer Sci

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The effect of PPS matrix evolution occurring during thermal treatment of carbon fiber-reinforced PPS plies prior to their consolidation to laminates on the mechanical behavior of the composite material has been investigated. The thermal treatments were performed at temperatures and times, which are relevant for processing PPS composites. All thermal treatments were carried out in an oven in air to facilitate the presence of oxygen, while the subsequent consolidation was performed in an autoclave. The tensile and in-plane shear behavior of both, thermal-treated and untreated materials, was investigated. Differential scanning calorimetry and microscopy analyses were made to evaluate the effect of the performed thermal treatments on degree of crystallinity and porosity of the laminates. The mechanical tests carried out have shown an appreciable degradation of the mechanical properties investigated. The observed degradation increases with increasing thermal treatment temperature and time when thermal treatments were carried out on each single composite ply prior to the consolidation. On the other hand, when, prior to the consolidation, the whole set of plies was subjected to thermal treatment, improved mechanical properties were observed. The results were discussed under the viewpoint of PPS matrix evolution during processing of the composite plies in the presence of oxygen.

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The thermal degradation of poly(phenylene sulphide)—Part 1

Cited by 30 publications

References 11 publications

Influence of consolidation process on voids and mechanical properties of powdered and commingled carbon/PPS laminates

Influence of consolidation process on voids and mechanical properties of powdered and commingled carbon/PPS laminates

Kinetics of the thermal degradation of hyperbranched poly(phenylene sulfide)

Effect of thermal treatment on the tensile and in‐plane shear behavior of carbon fiber‐reinforced poly(phenylene sulfide) composite specimens

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