New Insights into Lamellar Structure Development and SAXS/WAXD Sequence Appearance during Uniaxial Stretching of Amorphous Poly(ethylene terephthalate) above Glass Transition Temperature

2008 ◽  
Vol 41 (8) ◽  
pp. 2859-2867 ◽  
Author(s):  
Daisuke Kawakami ◽  
Christian Burger ◽  
Shaofeng Ran ◽  
Carlos Avila-Orta ◽  
Igors Sics ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Lamellar Structure ◽  
Ethylene Terephthalate ◽  
Structure Development ◽  
Uniaxial Stretching ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Uniaxial Stretching above the Glass Transition Temperature of Poly(Ethylene Terephthalate) and its Effects on the Structure Development

2008 ◽  
Vol 587-588 ◽  
pp. 529-533
Author(s):  
Lyudmil V. Todorov ◽  
Olga M. Freire ◽  
Júlio C. Viana
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Ethylene Terephthalate ◽  
Degree Of Crystallinity ◽  
Structure Development ◽  
Scanning Calorimetry ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Stretching Ratio

This work deals with an experimental investigation of the strain-induced crystalline microstructure that develops under uniaxial elongation of amorphous poly(ethylene terephthalate), PET, above its glass transition temperature, as an approach for industrial stretch-blow moulding processes. The present study aims at: a) defining the most relevant processing parameters which govern and are of significance for the induced morphology, and b) establishing of relationships between processing and morphology. Compression moulded amorphous PET was uniaxial stretched with variations of following stretching parameters: stretching temperature, Tst, stretching velocity, Vst, and stretching ratio, λst, that were varied in two levels according to a L8 Taguchi orthogonal array. The developed morphologies were characterized by differential scanning calorimetry (DSC) and birefringence measurements. Obtained results were analyzed by ANOVA statistical tool. The glass transition temperature, Tg, is influenced mainly by the stretching ratio. The cold crystallization temperature, Tcc, is determined by complex influence of all stretching variables and the interaction Tstxλst. The degree of crystallinity, χc, mainly depends upon Vst and Tstxλst interaction. The birefringence, n, is essentially determined by λst and the interaction Vstxλst. The distinct morphological parameters are then related with the purpose of understand the structure development upon polymer stretching.

Superstructure Evolution in Poly(ethylene terephthalate) during Uniaxial Deformation above Glass Transition Temperature

2006 ◽  
Vol 39 (8) ◽  
pp. 2909-2920 ◽  
Author(s):  
Daisuke Kawakami ◽  
Shaofeng Ran ◽  
Christian Burger ◽  
Carlos Avila-Orta ◽  
Igors Sics ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Ethylene Terephthalate ◽  
Uniaxial Deformation ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Biaxial stretch-induced crystallization of poly(ethylene terephthalate) above glass transition temperature: The necessary of chain mobility

Polymer ◽  
2016 ◽  
Vol 101 ◽  
pp. 15-23 ◽  
Author(s):  
Qianlei Zhang ◽  
Rui Zhang ◽  
Lingpu Meng ◽  
Yuanfei Lin ◽  
Xiaowei Chen ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Ethylene Terephthalate ◽  
Chain Mobility ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Induced Crystallization
Sign in / Sign up

Export Citation Format

Share Document