Tensile Properties of Polymerization-Filled Kevlar Pulp/Polyethylene Composites

Zhang, Yaolin; Rodrigue, Denis; Aı̈t-Kadi, A.

doi:10.1177/096739110401200101

Cited by 14 publications

(7 citation statements)

References 44 publications

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“…Several works have been done to determine the effect of short fibers on the properties of polymer composites [41][42][43][44][45][46][47][48][49][50][51][52] . Here, we investigated the elastic modulus of short fiber composites and comparison is made with well known models for randomly oriented short fiber composites 53 , such as Halpin-Tsai for 2D and 3D randomly oriented short fiber composites 51,52 , numerical integration of angular dependence of the modulus of 2D randomly oriented short fiber composites based on the model of Tsai-Hill [42][43] , and the model of Berlin et al 46 for Young's modulus of 3D randomly oriented short fiber composites including the fiber critical aspect ratio determined by three methods [47][48][49][50] . Of all the models tested, it was found that Berlin's approach for 3D randomly oriented short fiber composites in combination with the critical fiber aspect ratio given by Rosen's model produce reasonable prediction for PFC composites using: where E comp is the modulus of 3D randomly oriented short fiber composite, E fiber is the fiber modulus, E m is the matrix modulus, ϕ fiber is fiber volume fraction of unfoamed composites, l is fiber length, l c is the critical fiber length, l max is the maximum fiber For our composites foams, the Kevlar is dispersed in the solid phases of the foam.…”

Section: Modulus Relationship Between Composite Foams and Polymer Matrixmentioning

confidence: 99%

Polyethylene-Kevlar Composite Foams II: Mechanical Properties

2004

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Polyethylene-Kevlar composite foams were prepared by polymerization-compounding and melt blending to investigated and understand the effect of fibers. In the first part of this study (Zhang et al., Cellular Plastics, 22, (2003), 279), we reported on the preparation and morphology of these composite foams. In this second part, the effect of fibers on the mechanical properties of composite foams is investigated. Using several models for particulate composites, it was found that the normalized modulus of our composite foams can be well predicted by the simple Moore's empirical equation to take into account the foam morphology in combination with Berlin's approach and Rosen's model for critical fiber aspect ratio to account for the effect of fibers.

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Section: Modulus Relationship Between Composite Foams and Polymer Matrixmentioning

confidence: 99%

Polyethylene-Kevlar Composite Foams II: Mechanical Properties

2004

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“…In a previous study 14 , the fiber critical aspect ratio (l c /d) was determined by three methods. In method I, the critical aspect ratio was obtained based on fiber strength (σ f ) and interfacial shear strength (τ) as l c /d = σ f /(2τ).…”

Section: Randomly Oriented Short Fiber Compositesmentioning

confidence: 99%

“…Kevlar pulp was kindly provided by Dupont Canada (Toronto, Canada). Polymerization-filled Kevlar pulp was prepared in a batch reactor at 60°C as reports elsewhere 14 . Because of the limited amount available, no systematical determination of the polyethylene molecular weight and molecular weight distribution in polymerization-filled Kevlar pulp could be achieved.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…The commercial HDPE (G60-25-144) was kindly supplied by Solvay Polymer. 1 presents all the samples prepared and more details can be obtained elsewhere 14 .…”

Section: Experimental Materialsmentioning

confidence: 99%

“…There are several advantages of the polymerization filled technique: 1) more uniform distribution of filler throughout the polymer, and 2) optimum opportunity for the polymer to wet and to be adsorbed on the filler surface. [1][2][3][4][5][6][7][8][9][10][11][12][13] In a previous study 14 , short fiber composites were prepared using two techniques: polymerization filled composites (PFC) and melt blended composites (MBC). The fiber aspect ratio distribution, break strain, critical aspect ratios and Young's modulus of the composites were carefully analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Processing on Ductility and Strength of Kevlar/Polyethylene Composites

Zhang

Rodrigue

Aı̈t-Kadi

2004

Polymers and Polymer Composites

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Polymerization-filled composites (PFC) and melt-blended composites (MBC) were prepared to compare their mechanical properties. Improved ductility was obtained for PFC resulting from better fiber-polymer interfacial adhesion. On the other hand, ductility decreased upon increasing fiber content and strain rate, while normalized strengths were almost unchanged. This indicates that matrix and composites have similar responses to strain rate. Tensile strengths were compared with several modified models to include the effect of critical fiber aspect ratio. It was found that the numerical integration model with perfect interfacial bond in combination with Rosen's method for the critical fiber aspect ratio gave the best predictions among all the models tested. The results clearly show that the preparation technique has an effect on tensile strength of composites in relation with fiber distribution and interfacial adhesion.

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Study of dynamically cured PP/MAH‐g‐PP/talc/epoxy composites

Jiang

Zhang

2005

J of Applied Polymer Sci

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In the present study, an epoxy resin was dynamically cured in a polypropylene (PP)/maleic anhydride-grafted PP (MAH-g-PP)/talc matrix to prepare dynamically cured PP/MAH-g-PP/talc/epoxy composites. An increase in the torque at equilibrium showed that epoxy resin in the PP/MAH-g-PP/talc composites had been cured by 2-ethylene-4-methane-imidazole. Scanning electron microscopy analysis showed that MAH-g-PP and an epoxy resin had effectively increased the interaction adhesion between PP and the talc in the PP/talc composites. Dynamic curing of the epoxy resin further increased the interaction adhesion. The dynamically cured PP/MAH-g-PP/talc/epoxy composites had higher crystallization peaks than did the PP/talc composites. Thermogravimetric analysis showed that the addition of MAH-g-PP and the epoxy resin into the PP/talc composites caused an obvious improvement in the thermal stability. The dynamically cured PP/MAH-g-PP/ talc/epoxy composites had the best thermal stability of all the PP/talc composites. The PP/MAH-g-PP/talc/epoxy composites had better mechanical properties than did the PP/MAH-g-PP/talc composites, and the dynamically cured PP/MAH-g-PP/talc/epoxy composites had the best mechanical properties of all the PP/talc composites, which can be attributed to the better interaction adhesion between the PP and the talc. The suitable content of epoxy resin in the composites was about 5 wt %.

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Tensile Properties of Polymerization-Filled Kevlar Pulp/Polyethylene Composites

Cited by 14 publications

References 44 publications

Polyethylene-Kevlar Composite Foams II: Mechanical Properties

Polyethylene-Kevlar Composite Foams II: Mechanical Properties

Effect of Processing on Ductility and Strength of Kevlar/Polyethylene Composites

Study of dynamically cured PP/MAH‐g‐PP/talc/epoxy composites

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