Amorphous phase dynamics at the glass transition in drawn semi-crystalline polyester

被引：25

作者：

Delpouve, N. ^{[1
]}

Lixon, C. ^{[1
]}

Saiter, A. ^{[1
]}

Dargent, E. ^{[1
]}

Grenet, J. ^{[1
]}

机构：

[1] Univ Rouen, Fac Sci, Inst Mat Res, LECAP,Lab PBS,FRE 3101, F-76801 St Etienne, France

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2009年 / 97卷 / 02期

关键词：

CRR; DMA; drawing; PET; TMDSC; REARRANGING REGION SIZE; MODULATED TEMPERATURE DSC; CHARACTERISTIC LENGTH; FORMING LIQUIDS; FILMS; NANOCOMPOSITES; POLYMERS; PET; HETEROGENEITY; VITRIFICATION;

D O I：

10.1007/s10973-008-9670-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Temperature modulated differential scanning calorimetry (TMDSC) and dynamic mechanical analysis (DMA) are used to calculate cooperative rearranging region (CRR) average sizes for drawn poly(ethylene terephthalate) (PET) with different draw ratios (lambda) ranging from lambda=1 to 4, according to Donth's approach. It is shown for both studies that the CRR size decreases when increases, due to the amorphous phase confinement by the crystals generated during the drawing. However, differences observed between the values calculated from TMDSC and DMA investigations are explained by the differences between a mechanical uniaxial dynamic solicitation (DMA) or a thermal solicitation (TMDSC) in terms of cooperative rearrangements at the glass transition.

引用

页码：541 / 546

页数：6

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