Kinetics of Lipid Rearrangements during Poly(ethylene glycol)-Mediated Fusion of Highly Curved Unilamellar Vesicles†

Biochemistry ◽  
2002 ◽  
Vol 41 (4) ◽  
pp. 1241-1249 ◽  
Author(s):  
Kervin O. Evans ◽  
Barry R. Lentz
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Unilamellar Vesicles ◽  
Poly Ethylene ◽  
Kinetics Of

scholarly journals Non-Isothermal Crystallization Kinetics of Poly(Ethylene Glycol)–Poly(l-Lactide) Diblock Copolymer and Poly(Ethylene Glycol) Homopolymer via Fast-Scan Chip-Calorimeter

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1156
Author(s):  
Dejia Chen ◽  
Lisha Lei ◽  
Meishuai Zou ◽  
Xiaodong Li
Keyword(s):  
Ethylene Glycol ◽  
Heterogeneous Nucleation ◽  
Isothermal Crystallization ◽  
Crystallization Process ◽  
Poly Ethylene Glycol ◽  
Ozawa Method ◽  
Isothermal Crystallization Kinetics ◽  
Fast Cooling ◽  
Poly Ethylene ◽  
Kinetics Of

The non-isothermal crystallization kinetics of double-crystallizable poly(ethylene glycol)–poly(l-lactide) diblock copolymer (PEG-PLLA) and poly(ethylene glycol) homopolymer (PEG) were studied using the fast cooling rate provided by a Fast-Scan Chip-Calorimeter (FSC). The experimental data were analyzed by the Ozawa method and the Kissinger equation. Additionally, the total crystallization rate was represented by crystallization half time t1/2. The Ozawa method is a perfect success because secondary crystallization is inhibited by using fast cooling rate. The first crystallized PLLA block provides nucleation sites for the crystallization of PEG block and thus promotes the crystallization of the PEG block, which can be regarded as heterogeneous nucleation to a certain extent, while the method of the PEG block and PLLA block crystallized together corresponds to a one-dimensional growth, which reflects that there is a certain separation between the crystallization regions of the PLLA block and PEG block. Although crystallization of the PLLA block provides heterogeneous nucleation conditions for PEG block to a certain extent, it does not shorten the time of the whole crystallization process because of the complexity of the whole crystallization process including nucleation and growth.

scholarly journals Evaluation of the Ultraviolet-Curing Kinetics of Ultraviolet-Polymerized Oligomers Cured Using Poly (Ethylene Glycol) Dimethacrylate

Coatings ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 99 ◽  
Author(s):  
Ji-Won Park ◽  
Jong-Gyu Lee ◽  
Gyu-Seong Shim ◽  
Hyun-Joong Kim ◽  
Young-Kwan Kim ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Curing Kinetics ◽  
Ethylene Glycol Dimethacrylate ◽  
Glycol Dimethacrylate ◽  
Poly Ethylene Glycol ◽  
Ultraviolet Curing ◽  
Poly Ethylene ◽  
Kinetics Of

scholarly journals Characterization of the crosslinking kinetics of multi-arm poly(ethylene glycol) hydrogels formed via Michael-type addition

Soft Matter ◽  
2016 ◽  
Vol 12 (7) ◽  
pp. 2076-2085 ◽  
Author(s):  
Jiwon Kim ◽  
Yen P. Kong ◽  
Steven M. Niedzielski ◽  
Rahul K. Singh ◽  
Andrew J. Putnam ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Michael Type Addition ◽  
Poly Ethylene ◽  
Kinetics Of

scholarly journals Non-Isothermal Crystallization Kinetics of Poly(ethylene glycol) and Poly(ethylene glycol)-B-Poly(ε-caprolactone) by Flash DSC Analysis

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3713
Author(s):  
Xiaodong Li ◽  
Meishuai Zou ◽  
Lisha Lei ◽  
Longhao Xi
Keyword(s):  
Ethylene Glycol ◽  
Cooling Rate ◽  
Isothermal Crystallization ◽  
Three Dimensional ◽  
Crystallization Rate ◽  
Poly Ethylene Glycol ◽  
Avrami Model ◽  
Isothermal Crystallization Kinetics ◽  
Poly Ethylene ◽  
Kinetics Of

The non-isothermal crystallization behaviors of poly (ethylene glycol) (PEG) and poly (ethylene glycol)-b-poly(ε-caprolactone) (PEG-PCL) were investigated through a commercially available chip-calorimeter Flash DSC2+. The non-isothermal crystallization data under different cooling rates were analyzed by the Ozawa model, modified Avrami model, and Mo model. The results of the non-isothermal crystallization showed that the PCL block crystallized first, followed by the crystallization of the PEG block when the cooling rate was 50–100 K/s. However, only the PEG block can crystallize when the cooling rate is 200–600 K/s. The crystallization of PEG-PCL is completely inhibited when the cooling rate is 1000 K/s. The modified Avrami and Ozawa models were found to describe the non-isothermal crystallization processes well. The growth methods of PEG and PEG-PCL are both three-dimensional spherulitic growth. The Mo model shows that the crystallization rate of PEG is greater than that of PEG-PCL.

scholarly journals Studies on Chemical IR Images of Poly(hydroxybutyrate–co–hydroxyhexanoate)/Poly(ethylene glycol) Blends and Two-Dimensional Correlation Spectroscopy

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 507 ◽  
Author(s):  
Yeonju Park ◽  
Sila Jin ◽  
Yujeong Park ◽  
Soo Kim ◽  
Isao Noda ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Thermal Properties ◽  
Ethylene Glycol ◽  
Correlation Spectroscopy ◽  
Two Dimensional ◽  
Poly Ethylene Glycol ◽  
Biodegradable Poly ◽  
Poly Ethylene ◽  
Increasing Temperature ◽  
Kinetics Of

Biodegradable poly-[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoates] (PHBHx) have been widely studied for their applications in potentially replacing petroleum-based thermoplastics. In this study, the effect of the high molecular weight (Mn = 3400) poly(ethylene glycol) (PEG) blended in the films of PHBHx with different ratios of PEG was investigated using chemical FTIR imaging. Chemical IR images and FTIR spectra measured with increasing temperature revealed that PEG plays an important role in changing the kinetics of PHBHx crystallization. In addition, two-dimensional correlation spectra clearly showed that thermal properties of PHBHx/PEG blend film changed when the blending ratio of PHBHx/PEG were 60/40 and 50/50. Consequently, PEG leads to changes in the thermal behavior of PHBHx copolymers.

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