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John J Balatinecz - One of the best experts on this subject based on the ideXlab platform.

  • Cell morphology and property relationships of microcellular foamed pvc/wood‐Fiber Composites
    Polymer Engineering and Science, 1998
    Co-Authors: Laurent M Matuana, Chul B. Park, John J Balatinecz
    Abstract:

    Wood-Fiber Composites make use of cellulose Fibers as a reinforcing filler in the polymer matrix and are known to have a lower material cost and a higher stiffness than neat polymers. However, the lower material cost and enhanced stiffness of wood-Fiber Composites are achieved at the expense of other properties such as the ductility and impact strength. Since microcellular plastics exhibit a higher impact strength, higher toughness, and increased fatigue life compared to unfoamed plastics, microcellular foaming of wood-Fiber Composites will improve the mechanical properties of the Composites and therefore increase the usefulness of the materials. In this paper, microcellular foamed PVC/wood-Fiber Composites with unique cell morphology and material composition are characterized. Microcellular structures are produced in PVC/wood-Fiber Composites by first saturating the composite samples with CO2 under high pressure followed by rapidly decreasing the solubility of gas in the samples. The void fraction of the microcellular foamed PVC/wood-Fiber Composites is controlled by tailoring the composition of materials and the foaming process parameters. The results indicate that tensile and impact properties of microcellular foamed PVC/wood-Fiber Composites are most sensitive to changes in the cell morphology and the surface modification of Fibers.

  • processing and cell morphology relationships for microcellular foamed pvc wood Fiber Composites
    Polymer Engineering and Science, 1997
    Co-Authors: Laurent M Matuana, Chul B. Park, John J Balatinecz
    Abstract:

    In this research, the effects of the materials and the processing conditions on the cell morphology of foamed PVC /wood-Fiber Composites were studied with a view to establishing their process-structure relationships. Each step of microcellular PVC / wood-Fiber Composites processing is addressed, including the surface treatment of the wood-Fiber, mixing of polymer and wood-Fiber, manufacture of the Composites, the saturation of the Composites with gas, microcellular foaming of the Composites, and characterization of the cell morphology. The cellular morphologies of the foamed PVC/wood-Fiber Composites are a strong function of the content of plasticizer and the surface treatment of wood-Fiber as well as the gas saturation and foaming conditions.

  • Processing and cell morphology relationships for microcellular foamed PVC/wood-Fiber Composites
    Polymer Engineering and Science, 1997
    Co-Authors: Laurent M Matuana, Chul B. Park, John J Balatinecz
    Abstract:

    In this research, the effects of the materials and the processing conditions on the cell morphology of foamed PVC/wood-Fiber Composites were studied with a view to establishing their process-structure relationships. Each step of microcellular PVC/wood-Fiber Composites processing is addressed, including the surface treatment of the wood-Fiber, mixing of polymer and wood-Fiber, manufacture of the Composites, the saturation of the Composites with gas, microcellular foaming of the Composites, and characterization of the cell morphology. The cellular morphologies of the foamed PVC/wood-Fiber Composites are a strong function of the content of plasticizer and the surface treatment of wood-Fiber as well as the gas saturation and foaming conditions.

Laurent M Matuana - One of the best experts on this subject based on the ideXlab platform.

  • Effects of impact modifiers on the properties of rigid PVC/wood‐Fiber Composites
    Journal of Vinyl & Additive Technology, 2000
    Co-Authors: Fatih Mengeloglu, Laurent M Matuana, Julia A. King
    Abstract:

    This study examined the effects of impact modifier types and addition levels on the mechanical properties of rigid PVC/wood-Fiber Composites. The impact resistance of rigid PVC/wood-Fiber Composites depends strongly on the type and content of impact modifier. With the proper choice of modifier type and concentration, the impact strength of rigid PVC/wood-Fiber Composites can be significantly improved without degrading the tensile properties. Methacrylate-butadiene-styrene and all-acrylic modifiers performed in a similar manner and were more effective and efficient in improving the impact resistance of rigid PVC/wood-Fiber Composites than the chlorinated polyethylene modifier.

  • Cell morphology and property relationships of microcellular foamed pvc/wood‐Fiber Composites
    Polymer Engineering and Science, 1998
    Co-Authors: Laurent M Matuana, Chul B. Park, John J Balatinecz
    Abstract:

    Wood-Fiber Composites make use of cellulose Fibers as a reinforcing filler in the polymer matrix and are known to have a lower material cost and a higher stiffness than neat polymers. However, the lower material cost and enhanced stiffness of wood-Fiber Composites are achieved at the expense of other properties such as the ductility and impact strength. Since microcellular plastics exhibit a higher impact strength, higher toughness, and increased fatigue life compared to unfoamed plastics, microcellular foaming of wood-Fiber Composites will improve the mechanical properties of the Composites and therefore increase the usefulness of the materials. In this paper, microcellular foamed PVC/wood-Fiber Composites with unique cell morphology and material composition are characterized. Microcellular structures are produced in PVC/wood-Fiber Composites by first saturating the composite samples with CO2 under high pressure followed by rapidly decreasing the solubility of gas in the samples. The void fraction of the microcellular foamed PVC/wood-Fiber Composites is controlled by tailoring the composition of materials and the foaming process parameters. The results indicate that tensile and impact properties of microcellular foamed PVC/wood-Fiber Composites are most sensitive to changes in the cell morphology and the surface modification of Fibers.

  • processing and cell morphology relationships for microcellular foamed pvc wood Fiber Composites
    Polymer Engineering and Science, 1997
    Co-Authors: Laurent M Matuana, Chul B. Park, John J Balatinecz
    Abstract:

    In this research, the effects of the materials and the processing conditions on the cell morphology of foamed PVC /wood-Fiber Composites were studied with a view to establishing their process-structure relationships. Each step of microcellular PVC / wood-Fiber Composites processing is addressed, including the surface treatment of the wood-Fiber, mixing of polymer and wood-Fiber, manufacture of the Composites, the saturation of the Composites with gas, microcellular foaming of the Composites, and characterization of the cell morphology. The cellular morphologies of the foamed PVC/wood-Fiber Composites are a strong function of the content of plasticizer and the surface treatment of wood-Fiber as well as the gas saturation and foaming conditions.

  • Processing and cell morphology relationships for microcellular foamed PVC/wood-Fiber Composites
    Polymer Engineering and Science, 1997
    Co-Authors: Laurent M Matuana, Chul B. Park, John J Balatinecz
    Abstract:

    In this research, the effects of the materials and the processing conditions on the cell morphology of foamed PVC/wood-Fiber Composites were studied with a view to establishing their process-structure relationships. Each step of microcellular PVC/wood-Fiber Composites processing is addressed, including the surface treatment of the wood-Fiber, mixing of polymer and wood-Fiber, manufacture of the Composites, the saturation of the Composites with gas, microcellular foaming of the Composites, and characterization of the cell morphology. The cellular morphologies of the foamed PVC/wood-Fiber Composites are a strong function of the content of plasticizer and the surface treatment of wood-Fiber as well as the gas saturation and foaming conditions.

Thais H.s. Costa - One of the best experts on this subject based on the ideXlab platform.

  • Performance of polypropylene–wood Fiber Composites
    Polymer Testing, 1999
    Co-Authors: Fernanda M. B. Coutinho, Thais H.s. Costa
    Abstract:

    Abstract Polypropylene–wood Fiber Composites were prepared in the optimal mixture conditions determined in a previous work (180°C, 60 rpm, 10 min). Tensile, impact and three-point bending tests were performed in order to evaluate the adhesion between matrix and wood Fibers. Other than mixture conditions, drying temperature of treated wood Fiber is also an important factor to obtain good performance Composites as shown in this work. Tensile properties of Composites submitted to two extreme conditions (immersion in water at ambient temperature for 90 days and immersion in boiling water for 1 h) were determined. Heat deflection temperature and thermal analysis of Composites were evaluated.

Lih-sheng Turng - One of the best experts on this subject based on the ideXlab platform.

  • processing and characterization of solid and microcellular phbv coir Fiber Composites
    Materials Science and Engineering: C, 2010
    Co-Authors: Alireza Javadi, Yottha Srithep, Srikanth Pilla, Shaoqin Gong, Lih-sheng Turng
    Abstract:

    Abstract Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/coir Fiber Composites were prepared via both conventional and microcellular injection-molding processes. The surface of the hydrophilic coir Fiber was modified by alkali- and silane-treatment to improve its adhesion with PHBV. The morphology, thermal, and mechanical properties were investigated. The addition of coir Fiber (treated and untreated) reduced cell size and increased cell density. Further decrease in cell size and increase in cell density was observed for treated Fibers compared with PHBV/untreated-Fiber Composites. Mechanical properties such as specific toughness and strain-at-break improved for both solid and microcellular specimens with the addition of coir Fibers (both treated and untreated); however, the specific modulus remained essentially the same statistically while the specific strength decreased slightly. The silane-treated coir Fiber Composites showed the greatest improvement in specific toughness and strain-at-break among the treated-Fiber Composites. In addition, adding coir Fibers (treated and untreated) also increased the degree of crystallinity of the PHBV Composites. PHBV with treated coir Fibers showed a higher degree of crystallinity compared with untreated coir Fibers.

  • Processing and characterization of solid and microcellular PHBV/coir Fiber Composites
    Materials Science and Engineering: C, 2010
    Co-Authors: Alireza Javadi, Yottha Srithep, Srikanth Pilla, Shaoqin Gong, Lih-sheng Turng
    Abstract:

    Abstract Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/coir Fiber Composites were prepared via both conventional and microcellular injection-molding processes. The surface of the hydrophilic coir Fiber was modified by alkali- and silane-treatment to improve its adhesion with PHBV. The morphology, thermal, and mechanical properties were investigated. The addition of coir Fiber (treated and untreated) reduced cell size and increased cell density. Further decrease in cell size and increase in cell density was observed for treated Fibers compared with PHBV/untreated-Fiber Composites. Mechanical properties such as specific toughness and strain-at-break improved for both solid and microcellular specimens with the addition of coir Fibers (both treated and untreated); however, the specific modulus remained essentially the same statistically while the specific strength decreased slightly. The silane-treated coir Fiber Composites showed the greatest improvement in specific toughness and strain-at-break among the treated-Fiber Composites. In addition, adding coir Fibers (treated and untreated) also increased the degree of crystallinity of the PHBV Composites. PHBV with treated coir Fibers showed a higher degree of crystallinity compared with untreated coir Fibers.

Fernanda M. B. Coutinho - One of the best experts on this subject based on the ideXlab platform.

  • Performance of polypropylene–wood Fiber Composites
    Polymer Testing, 1999
    Co-Authors: Fernanda M. B. Coutinho, Thais H.s. Costa
    Abstract:

    Abstract Polypropylene–wood Fiber Composites were prepared in the optimal mixture conditions determined in a previous work (180°C, 60 rpm, 10 min). Tensile, impact and three-point bending tests were performed in order to evaluate the adhesion between matrix and wood Fibers. Other than mixture conditions, drying temperature of treated wood Fiber is also an important factor to obtain good performance Composites as shown in this work. Tensile properties of Composites submitted to two extreme conditions (immersion in water at ambient temperature for 90 days and immersion in boiling water for 1 h) were determined. Heat deflection temperature and thermal analysis of Composites were evaluated.