Swelling kinetics of a hydrogel of poly(ethylene glycol) and poly(acrylamide-co-styrene)

2002 ◽  
Vol 85 (7) ◽  
pp. 1419-1428 ◽  
Author(s):  
A. K. Bajpai ◽  
Mudita Shrivastava
Keyword(s):  
Ethylene Glycol ◽  
Swelling Kinetics ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Kinetics Of ◽  
Poly Acrylamide

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.

The role of hydrogen bonding in alginate/poly(acrylamide-co-dimethylacrylamide) and alginate/poly(ethylene glycol) methyl ether methacrylate-based tough hybrid hydrogels

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57678-57685 ◽  
Author(s):  
Zhi Wei Low ◽  
Pei Lin Chee ◽  
Dan Kai ◽  
Xian Jun Loh
Keyword(s):  
Hydrogen Bonding ◽  
Elastic Modulus ◽  
Ethylene Glycol ◽  
Methyl Ether ◽  
Poly Ethylene Glycol ◽  
Hybrid Hydrogels ◽  
Poly Ethylene ◽  
Glycol Methyl Ether ◽  
Poly Acrylamide

Hybrid hydrogels, with an elastic modulus and compressive toughness of 350 kPa and 70 J m−3, was synthesized and reported here.

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

LCST and UCST in One: Double Thermoresponsive Behavior of Block Copolymers of Poly(ethylene glycol) and Poly(acrylamide-co-acrylonitrile)

Langmuir ◽  
2015 ◽  
Vol 31 (32) ◽  
pp. 8940-8946 ◽  
Author(s):  
Florian Käfer ◽  
Fangyao Liu ◽  
Ullrich Stahlschmidt ◽  
Valérie Jérôme ◽  
Ruth Freitag ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Poly Acrylamide

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.

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