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Objemová relaxace u mamorfní a semikrystalické PET

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dc.title Objemová relaxace u mamorfní a semikrystalické PET cs
dc.title Volume relaxation in amorphous and semicrystalline PET en
dc.contributor.author Hadač, Jiří
dc.contributor.author Sáha, Petr
dc.contributor.author Slobodian, Petr
dc.relation.ispartof Journal of Material Science
dc.identifier.issn 0022-2461 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2007
utb.relation.volume 42
utb.relation.issue 11
dc.citation.spage 3724
dc.citation.epage 3731
dc.type article
dc.language.iso en
dc.publisher Springer-Verlag en
dc.identifier.doi 10.1007/s10853-006-0378-z
dc.relation.uri http://www.springerlink.com/content/rth58q00q7383843/
dc.subject objemová relaxace cs
dc.subject PET cs
dc.subject volume relaxation en
dc.subject PET en
dc.description.abstract 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. cs
dc.description.abstract 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 behavior of 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, was calculated 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. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1000821
utb.identifier.rivid RIV/70883521:28110/07:63505437
utb.identifier.obdid 16553042
utb.identifier.scopus 2-s2.0-34249809158
utb.identifier.wok 000247375100004
utb.source j-riv
utb.contributor.internalauthor Hadač, Jiří
utb.contributor.internalauthor Sáha, Petr
utb.contributor.internalauthor Slobodian, Petr
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