The synthesis and characterization of surface-modified polyethylene via novel anionic grafting chemistry /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=741326261&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Abstract: | The synthesis of macroinitiators containing anionic precursors at the termini of ethylene oligomers which can be blended into polyethylene such that they are located at the surface of cast films will be described. Such macroinitiators have mainly included diaryl methyl groups which are easily deprotonated by BuLi to generate reactive lithio diarylmethyl anions at a polyethylene film surface. Polymethacrylonitrile, poly(N,N-dimethylacrylamide) and copolymers of polymethacrylonitrile-poly(methyl methacrylate) have been attached to polyethylene films using these initiators. The fullerene C$ sb{60}$ has also been attached to diarylmethyl anions at a polyethylene film surface. Detailed spectroscopic studies of incorporated phenylpyrenyl methyl initiators as fluorescently tagged diarylmethyl groups have demonstrated the changes in solvent permeability and reactivity of the product grafted surfaces. More conventional spectroscopic and physical characterization of product surfaces was accomplished using contact angle goniometry, ATR-IR spectroscopy, transmission IR spectroscopy and XPS. A novel approach to study the 2-dimensional orientation and surface loading of difunctionalized polymer surfaces using internal fluorescence quenching was designed. This method involved the preparation of a terminally functionalized polyethylene oligomer containing a fluorescence quenching moiety, co-incorporation of this oligomer and a fluorophore containing oligomer into polyethylene, and studying the internal fluorescence quenching as a function of pH. |
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| Item Description: | Vita. "Major subject: Chemistry." |
| Physical Description: | xv, 183 leaves : illustrations ; 28 cm |
| Bibliography: | Includes bibliographical references. |