Influence of ethyl methacrylate content on the volume-phase transition of temperature-sensitive poly[(N-isopropylacrylamide)-co-(ethyl methacrylate)] microgels

2004 ◽  
Vol 54 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Xiaomei Ma ◽  
Xiaobin Huang ◽  
Lu Zhu ◽  
Xi'an Zhao ◽  
Xiaozhen Tang
Keyword(s):  
Phase Transition ◽  
Temperature Sensitive ◽  
Volume Phase Transition ◽  
Volume Phase ◽  
Ethyl Methacrylate

Kinetics of the temperature-induced volume phase transition in poly(2-(2-methoxyethoxy)ethyl methacrylate) hydrogels of various topologies

Polymer ◽  
2017 ◽  
Vol 110 ◽  
pp. 25-35 ◽  
Author(s):  
Marcin Pastorczak ◽  
Lidia Okrasa ◽  
Jeong Ae Yoon ◽  
Tomasz Kowalewski ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Phase Transition ◽  
Volume Phase Transition ◽  
Volume Phase ◽  
Ethyl Methacrylate ◽  
Kinetics Of

Volume phase transition induced by temperature sensitive DL-amino acid methyl ester side chain based copolymer gels

2000 ◽  
Vol 3 (3) ◽  
pp. 381-387 ◽  
Author(s):  
Akihiro Hiroki ◽  
Hideaki Iwakami ◽  
Masaru Yoshida ◽  
Takeshi Suwa ◽  
Masaharu Asano ◽  
...  
Keyword(s):  
Phase Transition ◽  
Amino Acid ◽  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Side Chain ◽  
Temperature Sensitive ◽  
Volume Phase Transition ◽  
Volume Phase ◽  
Acid Methyl ◽  
Amino Acid Methyl Ester

Pressure dependence of the volume phase-transition of temperature-sensitive gels

1996 ◽  
Vol 51 (12) ◽  
pp. 3235-3239 ◽  
Author(s):  
Xing Zhong ◽  
Yu-Xin Wang ◽  
Shi-Chang Wang
Keyword(s):  
Phase Transition ◽  
Pressure Dependence ◽  
Temperature Sensitive ◽  
Volume Phase Transition ◽  
Volume Phase

Temperature-Sensitive Nanogels PNIPAAm/DMA Prepared and Research

2012 ◽  
Vol 465 ◽  
pp. 141-145
Author(s):  
Hai Yan Wang ◽  
Qian Liao ◽  
Qiao Lan Shao ◽  
Gao Qiu ◽  
Xi Hua Lu
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Synthesis And Characterization ◽  
Temperature Sensitive ◽  
Volume Phase Transition ◽  
Volume Phase ◽  
New Class ◽  
Copolymer Gels ◽  
Temperature Controlled

There have much study about thermo-responsive nanogels,which exhibit temperature-controlled volume phase transitions.There have been few reports,however,of electrostatically neutral,thermosensitive nanogels with a high composition of hydrophilic monomer.Here,we describe the synthesis and characterization of a new class of nonionic copolymer nanogels based on N-ispropylacrylamide(NIPAM) and N,N-dimethylacrylamide(DMA),wich exhibit tunable volume phase transition temperatures.And increasing percentages of DMA in copolymer gels raises the LCST,and attenuates and broadens the volume phases transition.Through DLS, AFM and UV-Vis measurement it's size,shape and VPTTs.The character of nonionic NIPAM/DMA nanogels show it's tunable phase transitions promise to be useful for applicatipns in biotechnology and medicine.

scholarly journals The influence of selected NSAIDs on volume phase transition in poly(2-(2-methoxyethoxy)ethyl methacrylate) hydrogels

2016 ◽  
Vol 4 (8) ◽  
pp. 1528-1534 ◽  
Author(s):  
Magdalena N. Olejniczak ◽  
Krzysztof Piechocki ◽  
Marcin Kozanecki ◽  
Kaloian Koynov ◽  
Agnieszka Adamus ◽  
...  
Keyword(s):  
Phase Transition ◽  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Volume Phase Transition ◽  
Volume Phase ◽  
Ethyl Methacrylate

Hydrogels exhibiting Volume Phase Transition (VPT) are considered as useful biomaterials for the preparation of various drug delivery systems.

scholarly journals Investigation of the Effects of Different Hydrophilic and Hydrophobic Comonomers on the Volume Phase Transition Temperatures and Thermal Properties of N-Isopropylacrylamide-Based Hydrogels

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Ahmet Okudan ◽  
Abdullah Altay
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Pure Water ◽  
Thermal Analyses ◽  
Temperature Sensitive ◽  
Glass Temperature ◽  
Volume Phase Transition ◽  
Swelling Properties ◽  
Volume Phase ◽  
Swelling Equilibrium

In this work, a series of thermally responsive terpolymers of N-isopropylacrylamide (NIPA) with three different comonomer contents was synthesized, and their swelling behaviour was studied as a function of composition and temperature. Temperature-sensitive, random cross-linked terpolymers of NIPA were prepared from methyl methacrylate (MMA), N-tert-butylacrylamide (NTBA), and acrylic acid (AA) using a free radical polymerization method. In the synthesis of terpolymer hydrogels, N,N-methylene bisacrylamide (BIS) was used as cross-linkers and ammonium persulfate (APS) as initiator. The NIPA content of the monomer feed varied from 80 to 50 mol %, and other comonomer feed varied from 40 to 5 mol %. The swelling equilibrium of these hydrogels was studied as a function of temperature and hydrophobic and hydrophilic comonomer contents. The swelling properties of the polymers were investigated in pure water at temperatures from 10 to 80°C. All of the synthesized gels were found to be sensitive to temperature. Glass transition temperature analyses and thermal analyses of the synthesized hydrogels were studied. The volume phase transition temperature and the swelling equilibrium (r) values of NIPA-based hydrogels synthesized in different feed ratios and in varying monomer contents were found in the range of 17–52°C and 14–51 g H2O/g polymer, respectively. The glass temperature (Tg) of the NIPA/AA/(MMA or NTBA) hydrogels synthesized with feed ratios of 50/40/10 was found to be 133 or 142°C, respectively. The initial and the end degradation that were determined for hydrogels at high temperatures indicated the quite good thermal stability of hydrogels. When the mass loss of the synthesized hydrogels was 50%, the temperatures were measured between 247 and 258°C.

On the blistering of thermo-sensitive hydrogel: the volume phase transition and mechanical instability

Soft Matter ◽  
2019 ◽  
Author(s):  
Tong Shen ◽  
Jian Kan ◽  
Eduard Benet ◽  
Franck J. Vernerey
Keyword(s):  
Phase Transition ◽  
Temperature Sensitive ◽  
Volume Phase Transition ◽  
Mechanical Instability ◽  
Volume Phase ◽  
Physical Mechanisms

This paper explores the physical mechanisms responsible for the appearance of small blisters on the surface of temperature sensitive hydrogels as they deswell rapidly during their volume phase transition.

Triply-responsive OEG-based microgels and hydrogels: Regulation of swelling ratio, volume phase transition temperatures and mechanical properties

2021 ◽  
Author(s):  
Dongdong Lu ◽  
Mingning Zhu ◽  
Jing Jin ◽  
Brian R. Saunders
Keyword(s):  
Phase Transition ◽  
Biomedical Engineering ◽  
Volume Phase Transition ◽  
Swelling Ratio ◽  
Transition Temperatures ◽  
Ph Responsive ◽  
Network Systems ◽  
Volume Phase ◽  
Phase Transition Temperatures ◽  
Volume Swelling

Thermally- and pH-responsive microgels (MGs) and hydrogels are fascinating network systems that have been applied in biomedical engineering and sensing. The volume-swelling ratio (Q) and the volume-phase transition temperatures (VPTTs)...

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