Volume relaxation in amorphous and semicrystalline PET
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F07%3A63505437" target="_blank" >RIV/70883521:28110/07:63505437 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Volume relaxation in amorphous and semicrystalline PET
Original language description
Two types of polyethyleneterephthalate (PET) were investigated, one nearly amorphous and the other highly crystallized. DSC analysis and mercury- in-glass dilatometry were used to determine the effect of crystalline phase content on the thermal behaviorof amorphous phase. Increasing portion of crystals caused an increase in glass transition temperature (Tg) and broadening of the transition zone. Thermal expansion coefficient and specific heat decreased. The amount of rigid amorphous fraction, RAF, wascalculated to be around 21-26%. Volume relaxation measurements initiated by temperature down-jump from the equilibrium above Tg to several temperatures in the vicinity of Tg showed considerably reduced relaxation rate for semicrystalline PET.
Czech name
Objemová relaxace u mamorfní a semikrystalické PET
Czech description
Dva druhy PET byly zkoumány pomocí DSC a dilatometrie. Byl určen podíl krystalické fáze a její vliv na fázi amorfní. Dochází k zvýšení Tg a rozšíření Tg zóny. RAF byla odhadnuta na 21-26%. Objemová relaxace je výrazně snížena přítomností krystalické struktury.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Material Science
ISSN
0022-2461
e-ISSN
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Volume of the periodical
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Issue of the periodical within the volume
42
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
3724-3731
UT code for WoS article
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EID of the result in the Scopus database
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