Stereocomplex Crystallization of Star-Shaped 4-Armed Equimolar Stereo Diblock Poly(lactide)s with Different Molecular Weights: Isothermal Crystallization from the Melt

2016 ◽  
Vol 217 (14) ◽  
pp. 1547-1557 ◽  
Author(s):  
Hideto Tsuji ◽  
Nobutsugu Matsumura
Keyword(s):  
Isothermal Crystallization ◽  
Molecular Weights ◽  
Crystallization From The Melt

The Melting Behavior of Poly(Ethylene Terephthalate)/ Attapulgite Nanocomposites

2013 ◽  
Vol 773 ◽  
pp. 530-533
Author(s):  
Chen Liu ◽  
Xiang Hui Lu ◽  
Xue Qi ◽  
Peng Li
Keyword(s):  
Crystallization Temperature ◽  
Isothermal Crystallization ◽  
Ethylene Terephthalate ◽  
Melting Process ◽  
Melting Behavior ◽  
Crystallization Time ◽  
Scanning Calorimetry ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Crystallization From The Melt

The melting and recrystallization behavior of Poly(ethylene terephthalate) (PET)/ Attapulgite(At)nanocomposites after isothermal crystallization from the melt was studied by Step-scan differential scanning calorimetry (SDSC). The influence of At contents, crystallization temperature and crystallization time on the melting process were examined. Two melting endotherms(in the SDSC CP.A curves, reversible part) and one recrystallization exotherm (in the SDSC CP.IsoK curves, irreversible part)of PET/At nanocomposites after isothermal crystallization were observed during the melt process. This ascribes to the melting-recrystallization mechanism .The low temperature endotherm attributes to the melting of primary crystal formed during the isothermal treating and the high temperature endotherm resulting from the melting of recrystallization materials. The reason why more recrystallization happened with the increase of At content was given and the process of recrystallization was described in detail. The effects of crystal perfection and recrystallization were minimized by increasing of crystallization temperature and time.

Microscopically viewed structural change of PE during the isothermal crystallization from the melt

Polymer ◽  
1999 ◽  
Vol 40 (25) ◽  
pp. 7125-7135 ◽  
Author(s):  
Sono Sasaki ◽  
Kohji Tashiro ◽  
Masamichi Kobayashi ◽  
Yoshinobu Izumi ◽  
Katsumi Kobayashi
Keyword(s):  
Structural Change ◽  
Isothermal Crystallization ◽  
Crystallization From The Melt
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