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    Features

    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols

    ...

    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 1. PPE chemical structure.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 2. PPE-M chemical structure.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 3. Homogeneous PPE-M blends with PTMG and EO-PO.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 4. Reaction rates of PPE-M with 4,4’-MDI.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 5. Moisture uptake at 100% RH.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 6. Water absorption after immersion.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 7. Contact angles of PPE-M/EO-PO TPUs.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 8. Wear resistance.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 9. Tear resistance.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 10. Elongation at 50 to 75 °C.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 11. Effect of PPE-M on heat aging at 100 °C.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 12. Dielectric constant.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 13. Loss tangent.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 14. Carbonaceous residue (char).
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 15. Moisture uptake at 100% RH after seven days @ 50 °C.

    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 16. VICAT softening temperatures.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 17. Elongation at RT and 50 °C.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 18. Tensile strength at RT and 50 °C.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Figure 19. Effect of PPE-M on heat aging at 100 °C.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Table 1. Formulation of EO-PO-based TPUs.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Table 2. Formulation of PTMG-based TPUs.
    Thermoplastic Polyurethanes Containing Hydrophobic Polyphenylene Ether Polyols
    Table 3. Weight increase (%) after three days of chemical immersion.
    Edward N. Peters, Chief Scientist, SABIC, Selkirk, NY 03.19.18
    Abstract
    Polyurethanes have extensive structure/property diversity. They can be synthesized with a number of materials to modify and tailor their performance. There is interest in broadening the performance profile of Thermoplastic Polyurethanes (TPUs) with increased thermal stability and greater hydrophobicity. PPE telechelic macromonomers (PPE-M) are unique hydrophobic polyols which have an impressive track record in broadly enhancing the performance of epoxy resins, cyanate esters, and thermoplastics. Seeking to meet this demand for enhanced TPU performance, PPE-M were used to synthesize amphiphilic polyurethane block copolymers. In this paper, the performance properties of TPUs produced using these novel hydrophobic polyols are presented and their properties compared against reference TPUs. It was found that TPUs derived from these novel polyols maintain exceptional physical and mechanical performance while also exhibiting improved resistance to moisture and thermo-oxidative degradation. In addition, abrasion, tear, electric insulating properties, and chemical resistance were improved.

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