Characterization of uniaxially drawn poly(ethylene terephthalate) by CP/MAS 13C NMR and X-ray diffraction

被引：8

作者：

Miwa, Y ^{[1
]}

Takahashi, Y ^{[1
]}

Kitano, Y ^{[1
]}

Ishida, H ^{[1
]}

机构：

[1] Toray Res Ctr Ltd, Shiga 520, Japan

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1998年 / 441卷 / 2-3期

关键词：

CP/MAS C-13 NMR; uniaxially drawn poly(ethylene terephthalate) (PET); crystallite size; interplanar spacing;

D O I：

10.1016/S0022-2860(97)00302-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase structure of uniaxially drawn poly(ethylene terephthalate) (PET) has been studied by CP/MAS C-13 NMR spectroscopy and X-ray diffraction. CP/MAS C-13 NMR spectra show that the chemical shift values of the carbonyl and ethyleneglycol carbons of the non-annealed PET shift to high field as the draw ratio increases, but that the chemical shift values of the crystalline-peak for the heal-set PET shift to high field as the draw ratio decreases. Experimental results suggest that the process of crystallization is affected by the semi-ordered structure in the amorphous phase at the primary stage of the strain. These results show that there are some structural differences between PET crystals of low-stretched films and high-stretched ones before annealing. (C) 1998 Elsevier Science B.V.

引用

页码：295 / 301

页数：7

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