The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform

T Stern - One of the best experts on this subject based on the ideXlab platform.

  • sequential surface derivatization of pet films
    Macromolecules, 2000
    Co-Authors: D Cohn, T Stern
    Abstract:

    The present study describes the surface tailoring of a polymeric substrate by a multistep process using two consecutive plasma treatments, followed by derivatization reactions. The chemical concept of this approach is presented in this paper, using a poly(ethylene terephthalate) (PET) substrate. In the first step, tetrafluoroethylene (TFE) was plasma polymerized, generating a highly cross-linked perfluoric surface layer. The next step introduced amine groups into the plasma polymer, by exposing the surface to plasma of ammonia. The reactive amine moieties were then used as anchoring sites for further derivatization. Finally, poly(ethylene glycol) (PEG) chains were grafted onto the surface via a hexamethylene diisocyanate (HDI) spacer. The ESCA Spectrum of treated PET revealed that the surface chemistry obtained after plasma polymerizing TFE was one clearly dominated by CF2 and CF moieties, as demonstrated by the large peaks appearing at 291.1 and 289.5 eV, respectively. As expected, substantial amounts of...

D Cohn - One of the best experts on this subject based on the ideXlab platform.

  • sequential surface derivatization of pet films
    Macromolecules, 2000
    Co-Authors: D Cohn, T Stern
    Abstract:

    The present study describes the surface tailoring of a polymeric substrate by a multistep process using two consecutive plasma treatments, followed by derivatization reactions. The chemical concept of this approach is presented in this paper, using a poly(ethylene terephthalate) (PET) substrate. In the first step, tetrafluoroethylene (TFE) was plasma polymerized, generating a highly cross-linked perfluoric surface layer. The next step introduced amine groups into the plasma polymer, by exposing the surface to plasma of ammonia. The reactive amine moieties were then used as anchoring sites for further derivatization. Finally, poly(ethylene glycol) (PEG) chains were grafted onto the surface via a hexamethylene diisocyanate (HDI) spacer. The ESCA Spectrum of treated PET revealed that the surface chemistry obtained after plasma polymerizing TFE was one clearly dominated by CF2 and CF moieties, as demonstrated by the large peaks appearing at 291.1 and 289.5 eV, respectively. As expected, substantial amounts of...

Tsutomu Minami - One of the best experts on this subject based on the ideXlab platform.

  • preparation and cuprous ion conducting properties of the glasses in the system cuicu2wo4cupo3
    Solid State Ionics, 1994
    Co-Authors: Nobuya Machida, Toshihiko Shigematsu, Norihiko Nakanishi, Yoshiyuki Matsuda, Tsutomu Minami
    Abstract:

    Abstract in the process of preparation of Cu + ion conducting glasses, a problem is posed by the spontaneous disproportionation Cu + to Cu 0 and Cu 2+ during melting. Since the stability of Cu + ions during melting relates to the acidity of the melt, we have tried the glass formation in the system CuICu 2 WO 4 CuPO 3 , whose melt was expected to have high acidity. The ESCA Spectrum indicated that copper ions in the glasses existed only as Cu + ions, and the CuICu 2 WO 4 CuPO 3 glasses obtained show high ion conductivity in the range of 10 −2 ∼ 10 −4 S cm −1 at room temperature.

Nobuya Machida - One of the best experts on this subject based on the ideXlab platform.

  • preparation and cuprous ion conducting properties of the glasses in the system cuicu2wo4cupo3
    Solid State Ionics, 1994
    Co-Authors: Nobuya Machida, Toshihiko Shigematsu, Norihiko Nakanishi, Yoshiyuki Matsuda, Tsutomu Minami
    Abstract:

    Abstract in the process of preparation of Cu + ion conducting glasses, a problem is posed by the spontaneous disproportionation Cu + to Cu 0 and Cu 2+ during melting. Since the stability of Cu + ions during melting relates to the acidity of the melt, we have tried the glass formation in the system CuICu 2 WO 4 CuPO 3 , whose melt was expected to have high acidity. The ESCA Spectrum indicated that copper ions in the glasses existed only as Cu + ions, and the CuICu 2 WO 4 CuPO 3 glasses obtained show high ion conductivity in the range of 10 −2 ∼ 10 −4 S cm −1 at room temperature.

Toshihiko Shigematsu - One of the best experts on this subject based on the ideXlab platform.

  • preparation and cuprous ion conducting properties of the glasses in the system cuicu2wo4cupo3
    Solid State Ionics, 1994
    Co-Authors: Nobuya Machida, Toshihiko Shigematsu, Norihiko Nakanishi, Yoshiyuki Matsuda, Tsutomu Minami
    Abstract:

    Abstract in the process of preparation of Cu + ion conducting glasses, a problem is posed by the spontaneous disproportionation Cu + to Cu 0 and Cu 2+ during melting. Since the stability of Cu + ions during melting relates to the acidity of the melt, we have tried the glass formation in the system CuICu 2 WO 4 CuPO 3 , whose melt was expected to have high acidity. The ESCA Spectrum indicated that copper ions in the glasses existed only as Cu + ions, and the CuICu 2 WO 4 CuPO 3 glasses obtained show high ion conductivity in the range of 10 −2 ∼ 10 −4 S cm −1 at room temperature.