Complex cellular structure evolution of polystyrene/poly (ethylene terephthalate glycol-modified) foam using a two-step depressurization batch foaming process

2016 ◽  
Vol 52 (6) ◽  
pp. 595-618 ◽  
Author(s):  
Xiangdong Wang ◽  
Wenzhao Wang ◽  
Bengang Liu ◽  
Zhongjie Du ◽  
Xiangfang Peng
Keyword(s):  
Cellular Structure ◽  
Ethylene Terephthalate ◽  
Structure Evolution ◽  
Foaming Process ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Batch Foaming

scholarly journals Structure evolution and mechanical behavior of poly(ethylene terephthalate) fibers drawn at different number of drawing stages

2012 ◽  
Vol 18 (2) ◽  
pp. 233-243 ◽  
Author(s):  
Aminoddin Haji ◽  
Semnani Rahbar
Keyword(s):  
Ethylene Terephthalate ◽  
Structure Evolution ◽  
Mechanical And Thermal Properties ◽  
High Modulus ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Multi Stage ◽  
Poly Ethylene Terephthalate ◽  
Initial Modulus ◽  
Poly Ethylene

In this work, the structure, mechanical and thermal properties of PET fiber obtained by hot multi-stage drawing have been investigated in terms of their dependence on the number of drawing steps at an equivalent total draw ratio. Differential scanning calorimetry, birefringence, wide-angle x-ray diffraction, FTIR spectroscopy, tensile properties, and taut-tie molecules were used to characterize the fine structure and physical properties of the fibers. Results have been explained in terms of a higher drawing residence time at an equivalent drawing speed. For single stage drawn fiber, a high tensile strength is obtained, whereas a high initial modulus is obtained for fiber drawn at three-stage drawing. According to the results, an important finding is that three-stage drawing process has the potential to produce high-modulus fibers. The enhanced fraction of taut-tie molecules is found in three-stage drawn fiber, which is believed to be one of the important factors leading to the high modulus achieved in fibers drawn in hot multistage.

Lamellar and fibrillar structure evolution of poly(ethylene terephthalate) fiber in thermal annealing

Polymer ◽  
2016 ◽  
Vol 105 ◽  
pp. 157-166 ◽  
Author(s):  
Yatao Liu ◽  
Lixin Yin ◽  
Huirong Zhao ◽  
Guangkun Song ◽  
Fangming Tang ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Ethylene Terephthalate ◽  
Structure Evolution ◽  
Fibrillar Structure ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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