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Yi-huan Lee - One of the best experts on this subject based on the ideXlab platform.

  • synthesis of low melting temperature aliphatic Aromatic copolyamides derived from novel bio based semi Aromatic Monomer
    Polymers, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.

  • Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer
    MDPI AG, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively

Syang-peng Rwei - One of the best experts on this subject based on the ideXlab platform.

  • synthesis of low melting temperature aliphatic Aromatic copolyamides derived from novel bio based semi Aromatic Monomer
    Polymers, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.

  • Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer
    MDPI AG, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively

Palraj Ranganathan - One of the best experts on this subject based on the ideXlab platform.

  • synthesis of low melting temperature aliphatic Aromatic copolyamides derived from novel bio based semi Aromatic Monomer
    Polymers, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.

  • Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer
    MDPI AG, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively

Whe-yi Chiang - One of the best experts on this subject based on the ideXlab platform.

  • synthesis of low melting temperature aliphatic Aromatic copolyamides derived from novel bio based semi Aromatic Monomer
    Polymers, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.

  • Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer
    MDPI AG, 2018
    Co-Authors: Syang-peng Rwei, Palraj Ranganathan, Whe-yi Chiang, Yi-huan Lee
    Abstract:

    This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/Aromatic units weight content using a melt poly-condensation process. The bio-based Aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain Aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based Monomers. For the first time, the pertinent BABT/SA Aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The Aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively

Jungho Jae - One of the best experts on this subject based on the ideXlab platform.

  • effective depolymerization of concentrated acid hydrolysis lignin using a carbon supported ruthenium catalyst in ethanol formic acid media
    Bioresource Technology, 2017
    Co-Authors: Dong Jin Suh, Ivan Kristianto, Susan Olivia Limarta, Hyunjoo Lee, Jungho Jae
    Abstract:

    Lignin isolated by two-step concentrated acid hydrolysis of empty fruit bunch (EFB) was effectively depolymerized into a high-quality bio-oil using formic acid (FA) as an in-situ hydrogen source and Ru/C as a catalyst in supercritical ethanol. A bio-oil yield of 66.3wt% with an average molecular weight of 822g/mol and an Aromatic Monomer content of 6.1wt% was achieved at 350°C and a FA-to-lignin mass ratio of 3 after a reaction time of 60min. The combination of Ru/C and FA also resulted in a significant reduction in the oxygen content of the bio-oil by ∼60% and a corresponding increase in the higher heating value (HHV) to 32.7MJ/kg due to the enhanced hydrodeoxygenation activity. An examination of the FA decomposition characteristics revealed that Ru/C provides a greater increase in the rate of hydrogen production from FA, explaining the efficient depolymerization of lignin in a combined system.