THE EFFECT OF CONFORMATIONAL RESTRICTIONS ON THE SEGMENTAL RELAXATION DYNAMICS OF SEMICRYSTALLINE POLYMERS

被引：0

作者：

Flores, Araceli ^{[1
]}

Pieruccini, Marco ^{[2
]}

机构：

[1] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[2] CNR, Ist Proc Chim Fis, Sez Messina, I-98158 Messina, Italy

来源：

ATTI ACCADEMIA PELORITANA DEI PERICOLANTI-CLASSE DI SCIENZE FISICHE MATEMATICHE E NATURALI | 2010年 / 88卷 / 01期

关键词：

D O I：

10.1478/C1A1001001

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A statistical mechanical model is used to describe the effect of restrictions, due to confinement by crystals, on the segmental relaxation dyamics of semicrystalline polymers. It is shown that the emergence of a rearrangement free energy barrier is intrinsically associated with the dynamic heterogeneity observable in relaxation experiments such as those from dielectric spectroscopy. The relaxation behaviour of a number of systems has been considered; the analysis shows that chain orientation has a significant effect on the degree of cooperativity. Moreover, the relaxation features appear to be influenced by the thermodynamic state of the embedding crystalline domains.

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页数：9

相关论文

共 14 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].

ADAM, G ;

GIBBS, JH .

JOURNAL OF CHEMICAL PHYSICS, 1965, 43 (01) :139-&

[2] Confinement-induced vitrification in polyethylene terephthalate [J].

Balta Calleja, F. J. ;

Di Marco, G. ;

Flores, A. ;

Pieruccini, M. .

PHYSICAL REVIEW B, 2007, 75 (22)

[3] Uniaxially stretched poly(ethylene naphthalene 2,6-dicarboxylate) films studied by broadband dielectric spectroscopy [J].

Hakme, C ;

Stevenson, I ;

David, L ;

Bolteux, G ;

Seytre, G ;

Schnhals, A .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2005, 351 (33-36) :2742-2752

[4] THERMODYNAMIC DRIVING FORCE IN NUCLEATION AND GROWTH PROCESSES [J].

HOFFMAN, JD .

JOURNAL OF CHEMICAL PHYSICS, 1958, 29 (05) :1192-1193

[5] TEMPERATURE-DEPENDENT RELAXATION OF THE CRYSTAL AMORPHOUS INTERPHASE IN POLY(ETHER ETHER KETONE) [J].

HUO, PT ;

CEBE, P .

MACROMOLECULES, 1992, 25 (02) :902-909

[6]

LANDAU LD, 1978, FISICA STAT 1

[7] Influence of the crystalline structure in the segmental mobility of semicrystalline polymers: Poly(ethylene, naphthalene-2,6-dicarboxylate) [J].

Nogales, A ;

Denchev, Z ;

Sics, I ;

Ezquerra, TA .

MACROMOLECULES, 2000, 33 (25) :9367-9375

[8] Segmental relaxation in semicrystalline polymers: A mean-field model for the distribution of relaxation times in confined regimes [J].

Pieruccini, M. ;

Ezquerra, T. A. .

EUROPEAN PHYSICAL JOURNAL E, 2009, 29 (02) :163-171

[9] The role of the amorphous phase in the re-crystallization process of cold-crystallized poly(ethylene terephthalate) [J].

Pieruccini, M. ;

Flores, A. ;

Noechel, U. ;

Di Marco, G. ;

Stribeck, N. ;

Balta Calleja, F. J. .

EUROPEAN PHYSICAL JOURNAL E, 2008, 27 (04) :365-373

[10] Order and segmental mobility during polymer crystallization: Poly (butylene isophthalate) [J].

Sanz, A ;

Nogales, A ;

Ezquerra, TA ;

Lotti, N ;

Munari, A ;

Funari, SS .

POLYMER, 2006, 47 (04) :1281-1290