A flat polymeric gradient material: preparation, structure and property

In this work, a novel processing method that combined extruding with laminate molding for preparing polymeric gradient material (PGM) has been investigated. Three modes of polypropylene/polyamide-6 flat PGM (signed with A1, A2, A3) are prepared successfully by using this new technique. The variation of composition, morphology and mechanical properties of specimens sampled along the thickness direction of these flat PGMs was confirmed and characterized through measurements of WAXD, elemental analysis, TEM observation and mechanical tests. Results indicate that the content of either polymer shows a gradient variation along the thickness direction. TEM photographs exhibit that morphology also evolves gradually with the varying percentage ratio of two polymers. As a result of such variations in composition and structure, the mechanical properties on both sides or from central part to outside of the flat PGMs exhibit a significant difference.

[1]  M. Gonçalves,et al.  Polypropylene/polyamide-6 blends: influence of compatibilizing agent on interface domains , 2002 .

[2]  M. Santare,et al.  A novel technique for the fabrication of laboratory scale model functionally graded materials , 1999 .

[3]  S. Uemura,et al.  The Activities of FGM on New Application , 2003 .

[4]  J. Jang,et al.  Mechanical properties of glass-fibre mat/PMMA functionally gradient composite , 1999 .

[5]  S. Nagai,et al.  Preparation, characterization and properties of gradient polymer blends: discussion of poly(vinyl chloride)/poly(methyl methacrylate) blend films containing a wide compositional gradient phase , 1996 .

[6]  E. Wachtel,et al.  Morphology of α-transcrystalline isotactic polypropylene under tensile stress studied with synchrotron microbeam X-ray diffraction , 2001 .

[7]  Gang Wu,et al.  Structure Study of Polymer Gradient Materials , 2003 .

[8]  K. S. Ramesh,et al.  Modelling studies applied to functionally graded materials , 1995 .

[9]  B. Ohlsson,et al.  Effect of the mixing procedure on the morphology and properties of compatibilized polypropylene/polyamide blends , 1998 .

[10]  M. Koizumi.  FGM activities in Japan , 1997 .

[11]  R. Gadow,et al.  Functionally Graded Ceramic Materials for High Temperature Applications for Space Planes , 1999 .

[12]  M. A. Gómez,et al.  Structure and thermal properties of blends of nylon 6 and a liquid crystal copolyester , 1998 .

[13]  F. Chang,et al.  Poly(oxypropylene)-amide grafted polypropylene as novel compatibilizer for PP and PA6 blends , 2001 .

[14]  A. Kawasaki,et al.  Thermal fracture behavior of metal/ceramic functionally graded materials , 2002 .

[15]  Yoshihisa Kano,et al.  Controlling Gradient Domain Morphology in Blends of Poly(2-ethylhexyl acrylate-co-acrylic acid-co-vinyl acetate)/Poly(vinylidene fluoride-co-hexafluoroacetone) by Adding Micrograin Silica , 1997 .

[16]  M. Cima,et al.  Modeling and designing functionally graded material components for fabrication with local composition control , 1999 .

[17]  K. Lam,et al.  Material Characterization of FGM Plates Using Elastic Waves and an Inverse Procedure , 2001 .

[18]  V. M. Harding,et al.  Phase structure in polypropylene/PA6/SEBS blends , 1999 .

[19]  Tianxi Liu,et al.  Morphology, thermal and mechanical behavior of polyamide 6/layered-silicate nanocomposites , 2003 .

[20]  A. S. Pouzada,et al.  The use of a three-point support flexural test to predict the stiffness of anisotropic composite plates in bending , 2002 .

[21]  B. Reddy,et al.  Copolymerization of N‐substituted maleimide with alkyl acrylate and its industrial applications , 2001 .

[22]  Xiao-hui Liu,et al.  Non-isothermal crystallization behaviors of polyamide 6/clay nanocomposites , 2002 .

[23]  B. Adhikari,et al.  Polyimide and nylon 6 blend film: Preparation, characterization and thermal behavior , 2002 .

[24]  Jun Ma,et al.  Processing and characterization of metal–ceramics functionally gradient materials , 2001 .

[25]  Pak Ming Hui,et al.  Thermal conductivity of graded composites: Numerical simulations and an effective medium approximation , 1999 .

[26]  J. Pojman,et al.  Preparation of functionally gradient materials via frontal polymerization , 2000 .