| EPSRC Reference: |
GR/R34981/01 |
| Title: |
The Effect of Hydrogen Bonding Strength and Concentration on the Physical Ageing of Polymer Blends |
| Principal Investigator: |
Cowie, Professor I |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Engineering and Physical Science |
| Organisation: |
Heriot-Watt University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 2001 |
Ends: |
30 September 2004 |
Value (£): |
163,525
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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Previous study in this group (GR/J86455) has employed positron annihilation lifetime spectroscopy (PALS) to examine the interaction of hydrogen bonded polymer blends containing varying amounts of hydrogen bonding. This study implied that low levels of hydrogen bonding lead to a more open structure and an increase in free volume of the blends. It also showed that as the hydrogen bond concentration was increased there was a dramatic collapse in the free volume of the blend. It is proposed that this phenomenon can be further investigated by examining other polymer blends containing different hydrogen bond concentration as well as systems with varying strengths of hydrogen bonding. As well as PALS, physical ageing of these systems would be investigated using enthalpy relaxation methods to examine changes in network structure. Physical ageing within these systems manifests itself in the form of dimensional changes, an increase in brittleness and changes in the tensile strength and glass transition temperature and so examination of these systems using dynamic mechanical and and stress relaxation would also be undertaken. Blends of polyvinylmethylether with modified polystyrene have been studied previously in this group and would prove ideal for a systematic study of the effect of strength and number ofhydrogen bonds on physical ageing behaviour.,
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Key Findings |
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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 |
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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.hw.ac.uk |