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Titolo:
Effect of supermolecular structure changes on the glass transition of polymer
Autore:
Danch, A;
Indirizzi:
Uniwersytet Slaski, Inst Fizyki, PL-40007 Katowice, Poland Uniwersytet Slaski Katowice Poland PL-40007 i, PL-40007 Katowice, Poland
Titolo Testata:
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
fascicolo: 2, volume: 65, anno: 2001,
pagine: 525 - 535
SICI:
1388-6150(2001)65:2<525:EOSSCO>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIQUID-CRYSTAL POLYMER; POLY(4-METHYL-1-PENTENE) FILMS; NEUTRON-SCATTERING; PHASE-TRANSITIONS; RIGID BACKBONE; CRYSTALLIZATION; MEMBRANES; CAST;
Keywords:
alpha relaxation; glass transition; supermolecular structure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Danch, A Uniwersytet Slaski, Inst Fizyki, Uniwersytecka 4, PL-40007 Katowice, Poland Uniwersytet Slaski Uniwersytecka 4 Katowice Poland PL-40007 land
Citazione:
A. Danch, "Effect of supermolecular structure changes on the glass transition of polymer", J THERM ANA, 65(2), 2001, pp. 525-535

Abstract

The idea of two miscellaneous amorphous fractions in one polymeric system is under consideration. A new factor influencing the glass transition and arelaxation observed in polymers exhibiting different supermolecular structures is discussed. In order to clarify the specific arrangement of backbonechains two types of polymers were taken under investigation: semicrystalline poly(4-methyl-1-pentene) and a liquid-crystalline poly(norbornene) derivative. In both cases, it was possible to find two well separated glass transitions. Differential scanning calorimetry and dynamic mechanical thermal analysis were used to study the effect of thermal history on the assignment of the glass transition event associated with two miscellaneous amorphous phases. The problem of molecular arrangement in the amorphous phases is discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:11:00