Crystallisation process on the stage of the gel-to-solid transformation in thermo-reversible polyethylene gels

Autor(en): Pakhomov, PM
Khizhnyak, S
Ruhl, E
Egorov, V
Tshmel, A
Stichwörter: crystallisation; differential scanning calorimetry; gel-to-solid transformation; low-frequency Raman spectroscopy; polyethylene; Polymer Science
Erscheinungsdatum: 2003
Herausgeber: PERGAMON-ELSEVIER SCIENCE LTD
Journal: EUROPEAN POLYMER JOURNAL
Volumen: 39
Ausgabe: 5
Startseite: 1019
Seitenende: 1023
Zusammenfassung: 
The crystalline phase in gels and solid (gel derived) samples of ultra-high molecular weight polyethylene was studied using the low-frequency Raman spectroscopy and the differential scanning calorimetry methods. The Raman data evidence the presence in gels of tiny crystallites whose thickness (3-5 nm) depends on the sort of solvent used. After removal of the solvent by drying or squeezing the original gels, there appear some extra ordered regions (6-12 nm in size) coexisting in solid material with the primary crystallites which remain unchanged. It is concluded that the gel-to-solid transformation is accompanied by a secondary crystallisation process which is weakly (if ever) dependent on the incipient crystalline entities in gels. (C) 2002 Elsevier Science Ltd. All rights reserved.
ISSN: 00143057
DOI: 10.1016/S0014-3057(02)00305-1

Show full item record

Page view(s)

1
Last Week
0
Last month
0
checked on May 27, 2024

Google ScholarTM

Check

Altmetric