Element-specific study of local segmental dynamics of polyethylene terephthalate upon physical aging

2012 ◽  
Vol 137 (10) ◽  
pp. 104906 ◽  
Author(s):  
K. Sato ◽  
W. Sprengel
Keyword(s):  
Polyethylene Terephthalate ◽  
Physical Aging ◽  
Segmental Dynamics ◽  
Specific Study

121 Effects of physical aging on yield behavior of amorphous polyethylene terephthalate

2015 ◽  
Vol 2015.23 (0) ◽  
pp. _121-1_-_121-3_
Author(s):  
Yuki YONEZAWA ◽  
Makoto TAKEUCHI ◽  
Yoshinori YAMADA ◽  
Kazuhiro ISHIKAWA
Keyword(s):  
Polyethylene Terephthalate ◽  
Physical Aging ◽  
Yield Behavior

scholarly journals A Study on Physical Aging of Semicrystalline Polyethylene Terephthalate below the Glass Transition Point

2012 ◽  
Vol 10 (5) ◽  
Author(s):  
M. Farhoodi ◽  
S. M. Mousavi ◽  
R. Sotudeh-Gharebagh ◽  
Z. Emam-Djomeh ◽  
A. Oromiehie ◽  
...  
Keyword(s):  
Glass Transition ◽  
Aging Time ◽  
Polyethylene Terephthalate ◽  
Physical Aging ◽  
Degree Of Crystallinity ◽  
Glass Transition Point ◽  
Scanning Calorimetry ◽  
Different Temperatures ◽  
Dsc Method ◽  
Final Degree

Physical aging of semicrystalline polyethylene terephthalate was studied using differential scanning calorimetry(DSC). PET samples with crystallinity content of 0.28 were aged at two different temperatures, 25 and 45°C. Thesamples were stored for several days and periodically tested using DSC method. The glass transition temperature forthe samples aged at 25°C was about 73-74°C, and the position and intensity of endothermic peaks wereapproximately constant. Higher glass transition of the samples aged at 45°C, 73-86°C, was attributed to the enthalpyrelaxation process of amorphous regions of semicrystalline PET. For the samples aged at 45°C, the endothermicpeaks shifted to higher temperatures with increasing aging time. The position of the endothermic peaks determined bythe temperature of the maximum, Tmax, tended to increase with aging time for samples aged at 45°C, and theintensity of the peaks continuously increased with time; however, the results showed that the aging of PET samples at45°C even after 120 days continued the enthalpic relaxation of semicrystalline PET and that the process could bestudied by DSC method. The results also showed that the aging process could affect the final degree of crystallinity ofc-PET samples and the samples stored at 45°C showed higher degree of crystallinity than the samples aged at 25°C.

Segmental dynamics and physical aging of polystyrene/silver nanocomposites

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20086-20093 ◽  
Author(s):  
Yu Lin ◽  
Langping Liu ◽  
Jiaqi Cheng ◽  
Yonggang Shangguan ◽  
Wenwen Yu ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
Physical Aging ◽  
Segmental Dynamics ◽  
Variation Trend ◽  
Silver Nanocomposites ◽  
Complicated Variation

We report the complicated variation trend of calorimetric Tg and physical aging in PS/Ag nanocomposites, despite the invariant segmental dynamics with increasing silver nanoparticle loading.

Treatment of polyethylene terephthalate in a He glow discharge

2001 ◽  
Vol 11 (PR3) ◽  
pp. Pr3-357-Pr3-362 ◽  
Author(s):  
D. D. Papakonstantinou ◽  
D. Mataras ◽  
Arefi-Khonsari
Keyword(s):  
Glow Discharge ◽  
Polyethylene Terephthalate

Intertextual connections between Thomas More’s Utopia and Cicero’s De finibus bonorum et malorum

Moreana ◽  
2014 ◽  
Vol 51 (Number 195- (1-2) ◽  
pp. 63-84
Author(s):  
Ana Cláudia Romano Ribeiro
Keyword(s):  
Special Interest ◽  
Latin Literature ◽  
Specific Study ◽  
Intertextual Connections

In 1516, More wrote to Erasmus, putting him in charge of the publication of Utopia. In his study about the “sources, parallels and influences” of More’s libellus, Edward Surtz points out that “the most evident influences are classical” and in 1965, in the introduction of his edition of Utopia, he noted that in the composition of this fiction, Plato and Plutarch are as essential as Cicero and Seneca. He also noted that these philosophers are “the source for the tenets and arguments of the two schools discussed by the Utopians, the Epicurean and the Stoic” and that “Cicero’s De finibus is of special interest here, but detailed studies of Ciceronian and Senecan influences have still to be made.” (p.cliv, clxi). From 1965 until today we haven’t found a specific study on this problem in the bibliography about Utopia and classical Latin literature, that’s why in this paper we will examine some of the connections that link More’s libellus to De finibus.

The Waist Circumference That Predicts Insulin Resistance in Africans Is Higher in Women than Men—A Population-Specific Study

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1620-P
Author(s):  
JEAN DAMASCENE KABAKAMBIRA ◽  
SARA M. BRIKER ◽  
RAFEAL L. BAKER ◽  
AMBER B. COURVILLE ◽  
LILIAN MABUNDO ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Waist Circumference ◽  
Specific Study

Comportement diélectrique du polyéthylène téréphthalate (PET). Mesures de charges d'espace

2005 ◽  
Vol 8 (2) ◽  
pp. 205-220 ◽  
Author(s):  
Serge Agnel ◽  
Jérôme Castellon ◽  
Petru Nothinger Jr ◽  
Alain Toureille ◽  
Jean-Luc Franceschi ◽  
...  
Keyword(s):  
Polyethylene Terephthalate
Sign in / Sign up

Export Citation Format

Share Document