Crystallization behaviour and thermal stability of HDPE filled during polymerization

Polyethylene-Kevlar Composite Foams II: Mechanical Properties

“…It has been shown in the past that the polymerization-filled technique provides an effective way to improve the mechanical properties of polyolefins [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] . Preparation of polyolefin polymerization-filled composites (PFC) consists of 1) fixing a Ziegler-Natta (or metallocene) catalyst on the surface of the reinforcing agent and 2) polymerizing monomers (olefins) from the supported catalyst on the surface of the reinforcing agent.…”

“…There are several advantages of the polymerizationfilled technique: 1) uniform distribution of filler throughout the polymer, 2) optimum opportunity for the polymer to wet and to be adsorbed on the filler surface, and 3) achieve 'homogeneous composites'. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Gorelik et al 15 , Minkova and Maganini 16 , and Velikova et al 17 studied the mechanical properties of polyethylene PFC for different types of mineral fillers. Comparing MBC versus PFC, the latter showed marked improvement of mechanical properties, such as higher break strains and higher impact strength, for mineral filled polyethylene composites contents as high as 70%.…”

Tensile Properties of Polymerization-Filled Kevlar Pulp/Polyethylene Composites

“…Howard et al 8 analyzed degree of heterogeneity in clay-based polyethylene composites prepared by several methods, and found that polyethylene PFC are more efficient in dispersing the filler in a homogeneous fashion than composites prepared by melt blending (MBC). There are several advantages with polymerization filled technique: 1) having a uniform distribution of filler throughout the polymer, 2) providing optimum opportunity for the polymer to wet and to be adsorbed on the filler surface, and 3) forming 'homogeneous composites' [1][2][3][4][5][6][7][8][9][10][11][12][13] . Gorelik et al 11 , Minkova and Maganini 12 , and Minkova et al 13 studied the mechanical properties of polyethylene PFC for different types of mineral fillers.…”

Polyethylene-Kevlar Composite Foams I: Morphology

“…However the properties of composites greatly depend on the combined behaviors of fibers, matrix, and fiber-matrix interface. It has been shown in the past that the polymerization-filled technique provides an effective way to improve the mechanical properties of polyolefins (1)(2)(3)(4)(5)(6)(7)(8)(9) . Preparation of polyolefin polymerization-filled composites (PFC) consists of 1) fixing a Ziegler-Natta (or metallocene) catalyst on the surface of the reinforcing agent and 2) polymerizing monomers (olefins) from the supported catalyst on the surface of the reinforcing agent.…”

“…There are several advantages of the polymerizationfilled technique: 1) uniform distribution of filler throughout the polymer, and 2) optimum opportunity for the polymer to wet and to be adsorbed on the filler surface. For polyethylene, polymerization-filled composites (hereafter PFC) were first introduced by Lipscomb (1) , Howard (2,3) , and Kostandov et al (4) With this technique, composites were found to have better mechanical properties than composites prepared by standard melt blending (hereafter MBC) (1)(2)(3)(4)(5)(6)(7)(8)(9) . Kevlar fibers are widely used in the aeronautical industry as epoxy composites (10) .…”