The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform

Marco-a. De Paoli - One of the best experts on this subject based on the ideXlab platform.

  • Polyamide‐6/high‐Density Polyethylene blend using recycled high‐Density Polyethylene as compatibilizer: Morphology, mechanical properties, and thermal stability
    Polymer Engineering and Science, 2009
    Co-Authors: Márcio R. Vallim, M A Spinace, Joyce R. Araujo, Marco-a. De Paoli
    Abstract:

    Blends of polyamide-6 (PA6) or postindustry polyamide-6 (piPA6) and high-Density Polyethylene (HDPE) or recycled high-Density Polyethylene (rHDPE) were processed in single and twin-screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical properties. The thermal stability was also slightly improved compared with PA6 and HDPE blends. The Molau test exhibited a stable emulsion in formic acid, which can be attributed to the formation of an interfacial copolymer involving polar amino end groups of PA6 and the rHDPE, respectively. These results indicate that recycled polymers can be used in the production of polymer blends with improved properties. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers.

  • polyamide 6 high Density Polyethylene blend using recycled high Density Polyethylene as compatibilizer morphology mechanical properties and thermal stability
    Polymer Engineering and Science, 2009
    Co-Authors: Márcio R. Vallim, M A Spinace, Joyce R. Araujo, Marco-a. De Paoli
    Abstract:

    Blends of polyamide-6 (PA6) or postindustry polyamide-6 (piPA6) and high-Density Polyethylene (HDPE) or recycled high-Density Polyethylene (rHDPE) were processed in single and twin-screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical properties. The thermal stability was also slightly improved compared with PA6 and HDPE blends. The Molau test exhibited a stable emulsion in formic acid, which can be attributed to the formation of an interfacial copolymer involving polar amino end groups of PA6 and the rHDPE, respectively. These results indicate that recycled polymers can be used in the production of polymer blends with improved properties. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers.

Igor Krupa - One of the best experts on this subject based on the ideXlab platform.

  • phase change materials based on high Density Polyethylene filled with microencapsulated paraffin wax
    Energy Conversion and Management, 2014
    Co-Authors: Igor Krupa, Zuzana Nogellova, Zdenko Spitalský, Ivica Janigova, Bostjan Sumiga, Angela Kleinova, Mustapha Karkri, Mariam Al Ali Almaadeed
    Abstract:

    Abstract A modified in situ polymerization microencapsulation procedure for the preparation of microcapsules with paraffin wax cores (43 wt.%) and melamine–formaldehyde resin shells having a uniform size distribution and a spherical shape with average diameters of approximately 15 μm was developed. The high-Density Polyethylene/microcapsule blends were prepared via two routes. In the first case, the dry high-Density Polyethylene powder covered by microcapsules was simply hot pressed, whereas, in the second case, the dry high Density Polyethylene/capsule powder was first blended in the molten state to obtain better homogeneity before hot pressing. It was observed that both systems behave qualitatively the same with comparable mechanical properties and thermal behavior. The thermal stability of high-Density Polyethylene/microcapsule blends characterized by thermogravimetry is significantly lower than that of neat high-Density Polyethylene. The selected characteristic temperatures of degradation decreased by more than 200 °C compared with the related temperatures for neat high-Density Polyethylene. An analysis based on Differential Scanning Calorimetry revealed separated melting and crystallization behavior of wax within the capsules and high Density Polyethylene in the blends. The enthalpies of melting and crystallization are proportional to the amount of individual components in the material. The capsules have a strong plasticizing effect on the high Density Polyethylene, resulting in a significant decrease in the melting and crystallization temperatures. The plasticizing effect was also confirmed by measurements of the tensile mechanical properties and rheological behavior.

Mariam Al Ali Almaadeed - One of the best experts on this subject based on the ideXlab platform.

  • phase change materials based on high Density Polyethylene filled with microencapsulated paraffin wax
    Energy Conversion and Management, 2014
    Co-Authors: Igor Krupa, Zuzana Nogellova, Zdenko Spitalský, Ivica Janigova, Bostjan Sumiga, Angela Kleinova, Mustapha Karkri, Mariam Al Ali Almaadeed
    Abstract:

    Abstract A modified in situ polymerization microencapsulation procedure for the preparation of microcapsules with paraffin wax cores (43 wt.%) and melamine–formaldehyde resin shells having a uniform size distribution and a spherical shape with average diameters of approximately 15 μm was developed. The high-Density Polyethylene/microcapsule blends were prepared via two routes. In the first case, the dry high-Density Polyethylene powder covered by microcapsules was simply hot pressed, whereas, in the second case, the dry high Density Polyethylene/capsule powder was first blended in the molten state to obtain better homogeneity before hot pressing. It was observed that both systems behave qualitatively the same with comparable mechanical properties and thermal behavior. The thermal stability of high-Density Polyethylene/microcapsule blends characterized by thermogravimetry is significantly lower than that of neat high-Density Polyethylene. The selected characteristic temperatures of degradation decreased by more than 200 °C compared with the related temperatures for neat high-Density Polyethylene. An analysis based on Differential Scanning Calorimetry revealed separated melting and crystallization behavior of wax within the capsules and high Density Polyethylene in the blends. The enthalpies of melting and crystallization are proportional to the amount of individual components in the material. The capsules have a strong plasticizing effect on the high Density Polyethylene, resulting in a significant decrease in the melting and crystallization temperatures. The plasticizing effect was also confirmed by measurements of the tensile mechanical properties and rheological behavior.

Márcio R. Vallim - One of the best experts on this subject based on the ideXlab platform.

  • Polyamide‐6/high‐Density Polyethylene blend using recycled high‐Density Polyethylene as compatibilizer: Morphology, mechanical properties, and thermal stability
    Polymer Engineering and Science, 2009
    Co-Authors: Márcio R. Vallim, M A Spinace, Joyce R. Araujo, Marco-a. De Paoli
    Abstract:

    Blends of polyamide-6 (PA6) or postindustry polyamide-6 (piPA6) and high-Density Polyethylene (HDPE) or recycled high-Density Polyethylene (rHDPE) were processed in single and twin-screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical properties. The thermal stability was also slightly improved compared with PA6 and HDPE blends. The Molau test exhibited a stable emulsion in formic acid, which can be attributed to the formation of an interfacial copolymer involving polar amino end groups of PA6 and the rHDPE, respectively. These results indicate that recycled polymers can be used in the production of polymer blends with improved properties. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers.

  • polyamide 6 high Density Polyethylene blend using recycled high Density Polyethylene as compatibilizer morphology mechanical properties and thermal stability
    Polymer Engineering and Science, 2009
    Co-Authors: Márcio R. Vallim, M A Spinace, Joyce R. Araujo, Marco-a. De Paoli
    Abstract:

    Blends of polyamide-6 (PA6) or postindustry polyamide-6 (piPA6) and high-Density Polyethylene (HDPE) or recycled high-Density Polyethylene (rHDPE) were processed in single and twin-screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical properties. The thermal stability was also slightly improved compared with PA6 and HDPE blends. The Molau test exhibited a stable emulsion in formic acid, which can be attributed to the formation of an interfacial copolymer involving polar amino end groups of PA6 and the rHDPE, respectively. These results indicate that recycled polymers can be used in the production of polymer blends with improved properties. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers.

M A Spinace - One of the best experts on this subject based on the ideXlab platform.

  • Polyamide‐6/high‐Density Polyethylene blend using recycled high‐Density Polyethylene as compatibilizer: Morphology, mechanical properties, and thermal stability
    Polymer Engineering and Science, 2009
    Co-Authors: Márcio R. Vallim, M A Spinace, Joyce R. Araujo, Marco-a. De Paoli
    Abstract:

    Blends of polyamide-6 (PA6) or postindustry polyamide-6 (piPA6) and high-Density Polyethylene (HDPE) or recycled high-Density Polyethylene (rHDPE) were processed in single and twin-screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical properties. The thermal stability was also slightly improved compared with PA6 and HDPE blends. The Molau test exhibited a stable emulsion in formic acid, which can be attributed to the formation of an interfacial copolymer involving polar amino end groups of PA6 and the rHDPE, respectively. These results indicate that recycled polymers can be used in the production of polymer blends with improved properties. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers.

  • polyamide 6 high Density Polyethylene blend using recycled high Density Polyethylene as compatibilizer morphology mechanical properties and thermal stability
    Polymer Engineering and Science, 2009
    Co-Authors: Márcio R. Vallim, M A Spinace, Joyce R. Araujo, Marco-a. De Paoli
    Abstract:

    Blends of polyamide-6 (PA6) or postindustry polyamide-6 (piPA6) and high-Density Polyethylene (HDPE) or recycled high-Density Polyethylene (rHDPE) were processed in single and twin-screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical properties. The thermal stability was also slightly improved compared with PA6 and HDPE blends. The Molau test exhibited a stable emulsion in formic acid, which can be attributed to the formation of an interfacial copolymer involving polar amino end groups of PA6 and the rHDPE, respectively. These results indicate that recycled polymers can be used in the production of polymer blends with improved properties. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers.