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IBM Journal of Research and Development

Issue 2 • Date March 1977

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Displaying Results 1 - 14 of 14
  • Preface

    Publication Year: 1977, Page(s): 98
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (254 KB)

    During the past half century, we have witnessed a proliferation of synthetic polymers with few parallels in the records of technological advance. Some of them have replaced polymers of natural origin used for the artifacts of man from time immemorial; notable examples are synthetic fibers and synthetic rubbers. Others have found new uses and applications made possible by their novel properties - a... View full abstract»

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  • Preparation and Properties of (SN)x

    Publication Year: 1977, Page(s):99 - 110
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1192 KB)

    The chain compound (SN)x is the first example of a superconducting polymer. In this paper we review the chemistry, structure, and physical properties of (SN)x and describe how the electrical properties of this novel material depend upon the crystal growth technique. The thermal properties of S2N2 and (SN)x are discussed with particular referen... View full abstract»

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  • NMR Study of the Chain Microstructure of P(MMA-co-MAA)

    Publication Year: 1977, Page(s):111 - 120
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (830 KB)

    The usefulness of proton and carbon-13 NMR spectroscopy in characterizing the chain microstructure (i.e., sequence distribution and tacticity) of methyl methacrylate-methacrylic acid (MMA-MAA) copolymers has been investigated. Because the comonomers have such similar structures, assessment of chain tacticity and sequence distribution required computer simulation of spectra to circumvent the proble... View full abstract»

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  • Radiation Chemistry of Poly(methacrylates)

    Publication Year: 1977, Page(s):121 - 130
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (795 KB)

    An experimental study comparing radiation-induced degradation of poly(methacrylates) from ultraviolet, gamma-ray (60Co), and electron-beam irradiation is presented. Analytical techniques used include mass spectroscopy, low-temperature electron paramagnetic resonance, and infrared spectrometry. The poly(methacrylate) polymers investigated are poly(methyl methacrylate) (PMMA), poly(t-buty... View full abstract»

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  • Model for the Kinematics of Polymer Dissolution

    Publication Year: 1977, Page(s):131 - 142
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (907 KB)

    The dissolution of glassy polymers is described by a phenomenological model of the motion of two boundaries: the liquid-gel boundary and the gel-glass boundary. The motion of these boundaries, as well as the concentration profile in the layers of a dissolving polymer, was obtained by numerical solution of the Stefan boundary value problem. Confirmation of the experimental program written to simula... View full abstract»

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  • Parameters Affecting the Electron Beam Sensitivity of Poly(methyl methacrylate)

    Publication Year: 1977, Page(s):143 - 153
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (852 KB)

    Poly(methyl methacrylate), PMMA, is used as a model polymer to determine quantitatively the effect of molecular weight, molecular weight distribution, and tacticity on electron beam sensitivity. The heterotactic, syndiotactic, and isotactic stereoforms of PMMA were synthesized with molecular weights ranging from 104 to 107 and dispersivities from 1.2 to about 10. The G-values... View full abstract»

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  • Strength and Related Properties of Elastomeric Block Copolymers

    Publication Year: 1977, Page(s):154 - 167
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1122 KB)

    Stress-strain curves of single-phase noncrystallizable elastomers over extended ranges of temperature and extension rate are considered qualitatively along with phenomenological and mechanistic aspects of fracture. Data are presented to show that single-phase noncrystallizable elastomers lack toughness except when segmental mobility is sufficiently low so that viscoelastic processes near the tip o... View full abstract»

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  • Properties of Polymeric Thin Films by Integrated Optical Techniques

    Publication Year: 1977, Page(s):168 - 175
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (605 KB)

    We report an innovative procedure for taking measurements using integrated optical techniques on a number of polymers fabricated into thin film form and used as optical waveguides. Refractive index (including anisotropy), absorption and scattering, and film thickness have been determined by light guiding properties. Techniques for film preparation, including doctor blading, dipping, horizontal flo... View full abstract»

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  • Solubility and Diffusion of Sulfur in Polymeric Materials

    Publication Year: 1977, Page(s):176 - 189
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1228 KB)

    Radiotracer techniques were used to study the sorption of sulfur vapor by silicone and epoxy polymers and to obtain information on the diffusion of sulfur in these materials. Sulfur was found to enter silicone polymers solely by a physical solution process which obeys Henry's law. The heat of solution is large (−0.43 eV) and at room temperature the solubility coefficient is at least five or... View full abstract»

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  • Rheology and Modeling of the Spin Coating Process

    Publication Year: 1977, Page(s):190 - 198
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (813 KB)

    This study examines the spin coating process both experimentally and from a fundamental point of view. The analysis has produced a model and a quantitative relationship between spin coating thickness and pertinent material and process variables. The model predicts that the simplest and most reproducible results occur in a region which is independent of thickness and time and is characterized by lo... View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1977, Page(s):199 - 202
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (487 KB)

    Reprints of the papers listed here may usually be obtained by writing directly to the authors. The authors' IBM divisions are identified as follows: DPD is the Data Processing Division; FED, Field Engineering Division; FSD, Federal Systems Division; GPD, General Products Division; GSD, General Systems Division; OPD, Ofice Products Division; RES, Research Division; SCD, System Communications Divisi... View full abstract»

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  • Recent IBM Patents

    Publication Year: 1977, Page(s):203 - 204
    IEEE is not the copyright holder of this material | PDF file iconPDF (244 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1977, Page(s):205 - 207
    IEEE is not the copyright holder of this material | PDF file iconPDF (315 KB)
    Freely Available from IEEE
  • Contents of previous issue

    Publication Year: 1977, Page(s): 208
    IEEE is not the copyright holder of this material | PDF file iconPDF (219 KB)
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center