scholarly journals Crystal Structure of the Higher Temperature Phase (Type B) of Cyclic Trimer of Poly(ethylene terephthalate)

1992 ◽  
Vol 24 (10) ◽  
pp. 1099-1107 ◽  
Author(s):  
Yukishige Kitano ◽  
Tamaichi Ashida
Keyword(s):  
Crystal Structure ◽  
Ethylene Terephthalate ◽  
Temperature Phase ◽  
Type B ◽  
Cyclic Trimer ◽  
Poly Ethylene Terephthalate ◽  
Phase Type ◽  
Higher Temperature ◽  
Poly Ethylene

Crystal Structure and Composition of Poly(ethylene terephthalate-co-4,4‘-bibenzoate)

2004 ◽  
Vol 37 (20) ◽  
pp. 7643-7648 ◽  
Author(s):  
Hongming Ma ◽  
Tetsuya Uchida ◽  
David M. Collard ◽  
David A. Schiraldi ◽  
Satish Kumar
Keyword(s):  
Crystal Structure ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Direct methods in polymer fiber diffraction – the crystal structure of poly(ethylene terephthalate)

1998 ◽  
Vol 213 (9) ◽  
Author(s):  
D. L. Dorset
Keyword(s):  
Crystal Structure ◽  
Ethylene Terephthalate ◽  
Direct Methods ◽  
Polymer Fiber ◽  
Data Set ◽  
X Ray ◽  
Fiber Diffraction ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

AbstractUsing an x-ray fiber data set from poly(ethylene terephthalate) originally published in 1954, the crystal structure of the polymer was determined by direct methods,

Poly(ethylene terephthalate) fibers. 1. Crystal structure and morphology studies with full-pattern x-ray diffraction refinement

1993 ◽  
Vol 26 (9) ◽  
pp. 2187-2193 ◽  
Author(s):  
Yigang Fu ◽  
William R. Busing ◽  
Yimin Jin ◽  
Kathleen A. Affholter ◽  
Bernhard Wunderlich
Keyword(s):  
Crystal Structure ◽  
Ethylene Terephthalate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Morphology of Oligomer Crystals

1973 ◽  
Vol 31 ◽  
pp. 68-69
Author(s):  
Y. T. Chen ◽  
E. A. Bartkus
Keyword(s):  
Ethylene Terephthalate ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Isolation And Identification ◽  
X Ray ◽  
Cyclic Trimer ◽  
Poly Ethylene Terephthalate ◽  
Different Temperatures ◽  
Poly Ethylene ◽  
Pet Films

Poly(ethylene terephthalate) (PET), contains approximately 1.5% oligomer (cyclic trimer). When films are heated the oligomers tend to migrate out and crystallize on the surface. The isolation and identification of oligomer has been reported; the crystal structure has been studied by x-ray and electron diffraction. Except for some optical work, however, the crystal morphology of oligomer has not been carefully studied. This paper gives some results of an electron-microscopy study of the morphology of oligomer crystals.PET films were annealed in an oven at different temperatures for different lengths of time. Oligomer crystals were observed after one hour of annealing at temperatures as low as 100°C; they became visible after only a few minutes of annealing at 200°C.

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