| EPSRC Reference: |
GR/M99323/01 |
| Title: |
NMR STUDIES OF CHAIN MELT DYNAMICS IN MULTICOMPONENT POLYMER SYSTEMS |
| Principal Investigator: |
Klein, Dr P |
| Other Investigators: |
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| Department: |
Polymer Science and Technology |
| Organisation: |
University of Leeds |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 2000 |
Ends: |
31 August 2003 |
Value (£): |
177,630
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Materials Synthesis & Growth |
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| EPSRC Industrial Sector Classifications: |
| Manufacturing |
No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Our expertise in interpreting in MNR relaxation behaviour in Homo-polymers, in terms of fundamental physical parameters, is to be applied to a range of well -defined polymer blends and block copolymers. Underpinning the NMR methodology is the chemical synthesis, especially isotopic labelling, allowing selective NMR study of one component in the system. The proposed project is in the three sub-sections.Firstly mono-disperse hydrogeneous and deuterium-labelled polyethylenes, spanning a wide molecular weight (MW) range will be prepared using novel synthetic procedures. A range of Bi-disperse blends prepared from these samples, varying in composition and MW, will allow the influence of these aspects on entanglement MW, and on Zimm, Rouse and repetation dynamics to be assessed. Secondly PEO/PMMA blend s will be studied with the goal of quantifying the friction coefficient in a blend as a function of temperature and composition, and observing the individual glass transition behaviour of each component. Thirdly, deuterpolystyrene-poly-butylmethacryate diblock copolymers will be synthesised using anionic polymerisation. Using deuterium and two-dimensional proton NMR, the friction coefficient and persistence length of each block will be measured. The onset of phase separation above the LCST will be observed, for the first time using NMR, via the appearance of the frozen bond spectrum predicted theoretically.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.leeds.ac.uk |