Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Mohamad Reza Barzegari"'
Publikováno v:
Polymer. 114:15-27
The effects of the saturation temperature and high-pressure dissolved CO2 on the crystallization behavior of polyether-block-amide (Pebax®) containing various amounts of polyamide-12 hard segment were studied. Non-isothermal and isothermal analyses
Publikováno v:
Polymer. 55:651-662
This paper presents the effects of dissolved butane on the crystallization of hard segment (HS) and its effects on enhancement of cell nucleation to manufacture microcellular thermoplastic polyurethane foams (TPU). The TPU samples were first reproces
Autor:
Amir Ameli, Peter U. Jung, Chul B. Park, Hani E. Naguib, Mohamad Reza Barzegari, Davoud Jahani
Publikováno v:
Materials & Design. 53:20-28
In this study, a commercially available foam injection-molding machine was enhanced with a mold opening technique to produce polypropylene open-cell acoustic foams. Gas counter-pressure was used to improve the cell morphology and uniformity of the in
Publikováno v:
Cellular Polymers. 32:323-342
This work presents the production and characterization of functionally graded polymer foams produced by compression molding. For the conditions tested (temperature gradient, molding time, type and concentration of Expancel microbeads), it was possibl
Publikováno v:
Polymer Composites. 33:353-361
The mechanical, rheological, and morphological properties of polystyrene (PS)/lignin blends over a wide range of lignin content (0–80 wt%) have been studied in this work. PS/lignin blends were compounded in an internal batch mixer with and without
Autor:
Denis Rodrigue, Mohamad Reza Barzegari
Publikováno v:
Materials Science Forum. :693-698
Functionally graded materials (FGM) are characterized by a gradual change in the volume fractions of two or more components as a function of position along certain dimensions. FGM has been introduced as an alternative to laminated composites where a
Publikováno v:
Cellular Polymers. 30:157-186
In this work, density graded foams were produced using linear medium density polyethylene as the matrix and different grades of Expancel microbeads. Local density inside the foams was controlled by setting independently the top and bottom plates of a
Publikováno v:
Journal of Porous Materials. 18:715-721
In this work, a new phenomenological model is proposed to predict the flexural modulus of symmetric structural foams with complex density distribution across their thickness. The model is based on a generalized Fourier series to represent the density
Publikováno v:
Cellular Polymers. 29:259-282
Thermoplastic polymer foams can be produced using expandable beads like Expancel microbeads. In this work, density graded polyethylene foams were produced by imposing a temperature gradient using compression moulding. This was done by controlling ind
Publikováno v:
Cellular Polymers. 28:237-248
For any type of polymer foam, it is well known that careful control of the processing temperature has an important effect on final morphology. In this work, density graded polyethylene foams were produced by imposing a temperature gradient while foam