Fast-scan chip-calorimetry measurement on crystallization and enthalpy relaxation kinetics of isotactic poly(cyclohexene carbonate)

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Meng Zhang ◽  
Zhaolei Li ◽  
Xiao Fan ◽  
Guichuan Ren ◽  
Weijie Guo ◽  
...  
Keyword(s):  
Enthalpy Relaxation ◽  
Relaxation Kinetics ◽  
Chip Calorimetry ◽  
Kinetics Of

Structural interpretation of the enthalpy relaxation kinetics of (GeTe4)y(GaTe3)1−y far-infrared glasses

2016 ◽  
Vol 447 ◽  
pp. 110-116 ◽  
Author(s):  
Roman Svoboda ◽  
Michal Setnička ◽  
Zuzana Zmrhalová ◽  
Daniela Brandová ◽  
Jiří Málek
Keyword(s):  
Far Infrared ◽  
Enthalpy Relaxation ◽  
Relaxation Kinetics ◽  
Structural Interpretation ◽  
Kinetics Of

Relaxation Kinetics of an L3(Sponge) Phase

2002 ◽  
Vol 106 (36) ◽  
pp. 9410-9417 ◽  
Author(s):  
T. D. Le ◽  
U. Olsson ◽  
H. Wennerström ◽  
P. Uhrmeister ◽  
B. Rathke ◽  
...  
Keyword(s):  
Relaxation Kinetics ◽  
Sponge Phase ◽  
Kinetics Of

Assembly and relaxation behaviours of phosphatidylethanolamine monolayers investigated by polarization and frequency resolved SFG-VS

2015 ◽  
Vol 17 (38) ◽  
pp. 25114-25122 ◽  
Author(s):  
Feng Wei ◽  
Wei Xiong ◽  
Wenhui Li ◽  
Wangting Lu ◽  
Heather C. Allen ◽  
...  
Keyword(s):  
Relaxation Kinetics ◽  
Kinetics Of

Polarization and frequency resolved SFG-VS to distinguish the head/tail groups of lipids, to resolve the assembly and relaxation kinetics of monolayers.

Femtosecond relaxation kinetics of highly excited electronic wave packets in semiconductors

1998 ◽  
Vol 57 (19) ◽  
pp. 12369-12377 ◽  
Author(s):  
K. El Sayed ◽  
J. A. Kenrow ◽  
C. J. Stanton
Keyword(s):  
Wave Packets ◽  
Relaxation Kinetics ◽  
Electronic Wave ◽  
Kinetics Of

scholarly journals Fast-Scanning Chip-Calorimetry Measurement of Crystallization Kinetics of Poly(Glycolic Acid)

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 891
Author(s):  
Yongxuan Chen ◽  
Kefeng Xie ◽  
Yucheng He ◽  
Wenbing Hu
Keyword(s):  
Crystallization Kinetics ◽  
Temperature Region ◽  
Glycolic Acid ◽  
Crystal Nucleation ◽  
Side Group ◽  
Half Time ◽  
Temperature Range ◽  
Chip Calorimetry ◽  
Kinetics Of ◽  
Fast Scanning Chip Calorimetry

We report fast-scanning chip-calorimetry measurement of isothermal crystallization kinetics of poly(glycolic acid) (PGA) in a broad temperature range. We observed that PGA crystallization could be suppressed by cooling rates beyond -100 K s−1 and, after fast cooling, by heating rates beyond 50 K s-1. In addition, the parabolic curve of crystallization half-time versus crystallization temperature shows that PGA crystallizes the fastest at 130 °C with the minimum crystallization half-time of 4.28 s. We compared our results to those of poly(L-lactic acid) (PLLA) with nearby molecular weights previously reported by Androsch et al. We found that PGA crystallizes generally more quickly than PLLA. In comparison to PLLA, PGA has a much smaller hydrogen side group than the methyl side group in PLLA; therefore, crystal nucleation is favored by the higher molecular mobility of PGA in the low temperature region as well as by the denser molecular packing of PGA in the high temperature region, and the two factors together decide the higher crystallization rates of PGA in the whole temperature range.

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