onr:"swepub:oai:DiVA.org:kth-22600"
Search: onr:"swepub:oai:DiVA.org:kth-22600" > Effect of thermal h...
- 1 of 1
- Previous record
- Next record
- To hitlist
- Neway, B. (author)
Effect of thermal history on free volume and transport properties of high molar mass polyethylene
- Article/chapterEnglish2003
Publisher, publication year, extent ...
- Elsevier BV,2003
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:kth-22600
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-22600URI
- https://doi.org/10.1016/s0032-3861(03)00168-xDOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- QC 20100525
- The desorption of n-hexane from high molar mass polyethylene at 298 K has been studied. The polymer was given different thermal treatments to obtain differences in crystallinity, morphology and composition of the non-crystalline fraction. Crystal contents determined by Raman spectroscopy were always lower than those determined by density measurements. The systems with high crystallinity showed in relative terms a low content of interfacial component. The n-hexane solubilities of the samples were strictly proportional to the volume fraction of penetrable polymer (liquid-like and interfacial components) and the solubility was low in comparison with that of branched polyethylene of the same crystallinity. The Cohen-Tumbull-Fujita free volume theory was numerically capable of describing the desorption process in the polyethylenes studied. One of the methods used assumed that all three non-crystalline components-liquid-like, interfacial liquid-like and interfacial crystal core components-are penetrable by n-hexane and this method yielded data for the geometrical impedance factor and the fractional free volume with physically realistic trends, but the changes in the geometrical impedance factor was not in quantitative agreement with the Fricke model applied to the morphological data. This lack of numerical agreement is tentatively due to the fact that the assessment of crystal shape by transmission electron microscopy of stained sections systematically underestimates the crystal widths, particularly for the low-crystallinity samples with curved and 'twisting' crystal lamellae.
Subject headings and genre
- diffusion
- polyethylene
- free volume
- small-molecule penetrants
- semicrystalline polymers
- diffusion
- liquids
- temperature
- morphology
- desorption
- dependence
- transition
Added entries (persons, corporate bodies, meetings, titles ...)
- Hedenqvist, Mikael S.KTH,Polymerteknologi(Swepub:kth)u10rkaxe (author)
- Gedde, Ulf W.KTH,Polymerteknologi(Swepub:kth)u1j56evm (author)
- KTHPolymerteknologi (creator_code:org_t)
Related titles
- In:Polymer: Elsevier BV44:14, s. 4003-40090032-38611873-2291
Internet link
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Neway, B.
- Hedenqvist, Mika ...
- Gedde, Ulf W.
- Articles in the publication
- Polymer
- By the university
- Royal Institute of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
