A Study of the crystallisation kinetics in PEEK and PEEK composites

2846 22 15901 7 26761 document 15901 harris_11_MRes.pdf application/pdf e4921f61e5138a219b922867f1d81080 MD5 1985903 2011-11-08 12:53:32 http://etheses.bham.ac.uk//id/eprint/2846/1/harris_11_MRes.pdf 2846 1 2 application/pdf application/pdf en public

harris_11_MRes.pdf

http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/15905 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/15905 http://eprints.org/relation/hassmallThumbnailVersion http://etheses.bham.ac.uk/id/document/15905 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/15906 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/15906 http://eprints.org/relation/haspreviewThumbnailVersion http://etheses.bham.ac.uk/id/document/15906 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/15908 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/15908 http://eprints.org/relation/hasIndexCodesVersion http://etheses.bham.ac.uk/id/document/15908 15902 6 26764 document 15902 Decl_IS_Harris_11_MRes.pdf application/pdf 319279f2e37d13a70525f294106ac0ca MD5 276746 2011-11-08 12:53:53 http://etheses.bham.ac.uk//id/eprint/2846/2/Decl_IS_Harris_11_MRes.pdf 2846 2 1 application/pdf application/pdf en staffonly

Decl_IS_Harris_11_MRes.pdf

http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/15903 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/15903 http://eprints.org/relation/hassmallThumbnailVersion http://etheses.bham.ac.uk/id/document/15903 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/15904 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/15904 http://eprints.org/relation/haspreviewThumbnailVersion http://etheses.bham.ac.uk/id/document/15904 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/15907 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/15907 http://eprints.org/relation/hasIndexCodesVersion http://etheses.bham.ac.uk/id/document/15907 15903 2 26772 document 15903 small.png image/png ce7e4a8a49499fbcf1ee97e6f204d888 MD5 7591 2011-11-08 12:55:41 http://etheses.bham.ac.uk//id/eprint/2846/3/small.png 2846 3 3 image/png thumbnail_small Thumbnail Documents conversion from application/pdf to thumbnail_small en staffonly

small.png

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/15902 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/15902 http://eprints.org/relation/issmallThumbnailVersionOf http://etheses.bham.ac.uk/id/document/15902 15904 2 26773 document 15904 preview.jpg image/jpeg d40257c61131f36780c1791c2b922698 MD5 28578 2011-11-08 12:55:41 http://etheses.bham.ac.uk//id/eprint/2846/4/preview.jpg 2846 4 4 image/jpeg image/jpeg Thumbnail Documents conversion from application/pdf to thumbnail_preview en staffonly

preview.jpg

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/15902 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/15902 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/15902 15905 2 26774 document 15905 small.png image/png 354d46cfd53d8154bc8024db7867d3f2 MD5 3996 2011-11-08 12:55:42 http://etheses.bham.ac.uk//id/eprint/2846/5/small.png 2846 5 5 image/png thumbnail_small Thumbnail Documents conversion from application/pdf to thumbnail_small en staffonly

small.png

preview.jpg

indexcodes.txt

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/15902 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/15902 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/15902 15908 2 26777 document 15908 indexcodes.txt text/plain e6092e63db8e8a49160793634739f76f MD5 17836 2011-11-08 12:55:45 http://etheses.bham.ac.uk//id/eprint/2846/8/indexcodes.txt 2846 8 8 text/plain indexcodes Generate index codes conversion from application/pdf to indexcodes en staffonly

indexcodes.txt

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/15901 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/15901 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/15901 archive 4031 disk0/00/00/28/46 2011-11-08 12:55:18 2021-03-11 17:04:44 2011-11-08 12:55:18 thesis show 0 Harris Luke Jenkins Mike 710634 University of Birmingham A Study of the crystallisation kinetics in PEEK and PEEK composites unpub TN TS 10col_ephy Email address added from PARCS spreadsheet (AH 11/03/2021) The two main objectives of the current work were: 1) Isothermally crystallise samples of Carbon-Filled PEEK and Unfilled PEEK at a range of temperatures above the Tg and analyse them using the Conventional Avrami method and the Differential Avrami method. The results were then compared and conclusions drawn. 2) Characterise the crystallisation process by the use of two methods of determining polymer crystallinity. ATR-FTIR and Hyper-DSC were both used to determine sample crystallinity and correlations were drawn between the two methods to provide non-destructive crystallinity data of the samples. The isothermal crystallisation behaviour of the filled samples showed that at lower isothermal crystallisation temperatures, carbon inclusions hindered the nucleation process compared to that of neat PEEK. However, at higher crystallisation temperatures the carbon inclusions could be said to act as stress initiators that increase polymer nucleation and subsequent growth. It could also be seen that the use of the Differential Avrami approach to analyse the Isothermal crystallisation process gave a more accurate determination of the Avrami exponent n. It was found that the Differential approach gave a higher value of n, closer to the integer 4. This therefore shows a shift in crystallisation growth mechanism and is conclusive with other literature findings. FTIR and Hyper-DSC techniques can conclusively characterise crystalline presence within semi-crystalline PEEK. The crystalline fingerprint bands found within the FTIR spectra conclusively determined crystalline changes within pre-conditioned samples of PEEK, strongly correlating to other literature findings. Hyper-DSC results also showed that higher heating rates for determining crystallinity should be used in order to produce more accurate results and prevent any molecular melt and recrystallisation within the polymer samples. 2011-12-17 2011-09 graduation eng author checked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. full lukeharris86@hotmail.co.uk public 102 University of Birmingham School of Metallurgy and Materials m_rs na 2011-12-17 graduation