The Swelling and Transition Behavior of Poly(2-(2-methoxyethoxy) Ethoxyethyl Methacrylate-co-Ethylene Glycol Methacrylate) Random Copolymers in Thin Films

2015 ◽  
Vol 671 ◽  
pp. 273-278
Author(s):  
Jie An ◽  
Yang Yi Chen ◽  
Lei Mi ◽  
Ji Ping Wang ◽  
Qi Zhong
Keyword(s):  
Ethylene Glycol ◽  
Film Thickness ◽  
Random Copolymer ◽  
Solution Concentration ◽  
Random Copolymers ◽  
Glycol Methacrylate ◽  
Transition Behavior ◽  
Water Vapor Atmosphere ◽  
Copolymer Poly ◽  
Tetrahydrofuran Solution

Thermo-responsive random copolymer poly (2-(2-methoxyethoxy) ethoxyethyl methacrylate-co-ethylene glycol methacrylate) P(MEO2MA-co-EGMA) was investigated in thin film. By spin-coating, the obtained film thickness varied from 9 nm to 97 nm, which shows a linear relationship with tetrahydrofuran solution concentration. The swelling and transition behavior of P(MEO2MA-co-EGMA) films were monitored by white-light interferometry under water vapor atmosphere. It is observed that the film rapidly swelled in the first 90 min. Afterwards it reached an equilibrium state. The film thickness did not show a prominent increase by further prolonging the swelling time. In addition, the swelling capability of P(MEO2MA-co-EGMA) films was related to the film thickness. The thicker film possessed less swelling capability. Unlike the transition behavior in aqueous solution, P(MEO2MA-co-EGMA) films showed a much broader transition region, which might be related to the influence of Si substrate.

Smart control of cotton fabric comfort by cross-linking thermo-responsive poly(2-(2-methoxyethoxy) ethoxyethyl methacrylate-co-ethylene glycol methacrylate)

2016 ◽  
Vol 87 (13) ◽  
pp. 1620-1630 ◽  
Author(s):  
Yangyi Chen ◽  
Jie An ◽  
Qi Zhong ◽  
Peter Müller-Buschbaum ◽  
Jiping Wang
Keyword(s):  
Ethylene Glycol ◽  
Cotton Fabric ◽  
Random Copolymer ◽  
Cotton Fabrics ◽  
Molar Ratio ◽  
Cross Linking ◽  
Glycol Methacrylate ◽  
Moisture Permeability ◽  
Smart Control ◽  
Fabric Comfort

The smart control of cotton fabric comfort by cross-linking thermo-responsive random copolymer is investigated. The monomers 2-(2-methoxyethoxy) ethoxyethyl methacrylate (MEO2MA) and ethylene glycol methacrylate (EGMA) with a molar ratio of 17:3 are selected to synthesize the thermo-responsive random copolymer poly(2-(2-methoxyethoxy) ethoxyethyl methacrylate- co-ethylene glycol methacrylate), abbreviated as P(MEO2MA- co-EGMA). By using citric acid as a cross-linking agent, the obtained P(MEO2MA- co-EGMA) is successfully immobilized onto cotton fabrics. Smart control is achieved from the thermo-responsive behavior of the copolymer. Cross-linked P(MEO2MA- co-EGMA) will collapse when the ambient temperature exceeds its transition temperature. Therefore, the formerly compact P(MEO2MA- co-EGMA) layer will switch to a porous structure, and the air/moisture permeability of the textiles is enhanced. As the comfort of the textiles is closely related to the air/moisture permeability, a smart control of the cotton fabric comfort can be realized. In addition, the softness of cotton fabrics with and without thermo-responsive polymers does not show a prominent change, even when the applied solution concentration is as high as 16% (wt%). On the contrary, the stiffness of the cotton fabric coated with poly( N-isopropylacrylamide) (PNIPAM) is significantly higher than the original cotton fabric, indicating that homo PNIPAM is less suitable for textiles used in daily lives. Moreover, the whiteness and mechanical properties are studied and stay unchanged after cross-linking. As a consequence, the introduction of P(MEO2MA- co-EGMA) into textiles can provide textiles with smart control of cotton comfort, and it will not influence the wearabilities of the textiles.

The Swelling and Transition Behavior of Thermo-Responsive Poly(2-(2-Methoxyethoxy) Ethoxyethyl Methacrylate-co-Poly(Ethylene Glycol) Methyl Ether Methacrylate) Thin Films

2021 ◽  
Vol 873 ◽  
pp. 59-64
Author(s):  
Yang Yi Chen ◽  
Wen Jing Wen ◽  
Zhi Qin Su ◽  
Qi Huan ◽  
Chu Yang Zhang
Keyword(s):  
Thin Films ◽  
Ethylene Glycol ◽  
Methyl Ether ◽  
Random Copolymer ◽  
Molar Ratio ◽  
Poly Ethylene Glycol ◽  
H Nmr ◽  
Poly Ethylene ◽  
Copolymer Poly ◽  
Glycol Methyl Ether

Thermo-responsive random copolymer poly (2-(2-methoxyethoxy) ethoxyethyl methacrylate-co-poly (ethylene glycol) methyl ether methacrylate), abbreviated as P(MEO2MA-co-OEGMA300) was synthesized by 2-(2-methoxyethoxy) ethoxyethyl methacrylate (MEO2MA) and poly (ethylene glycol) methyl ether methacrylate (OEGMA300) with a molar ratio of 1:1 via atom transfer radical polymerization (ATRP). The structure of P(MEO2MA-co-OEGMA300) was confirmed by 1H NMR and GPC. The transition behaviors of P(MEO2MA-co-OEGMA300) in aqueous solution were investigated by UV-Vis and DLS. While the transition behaviors of P(MEO2MA-co-OEGMA300) thin films were probed by white light interferometry. Compared to the P(MEO2MA-co-OEGMA300) in solution, it shows a much broader transition region, which is a promising candidate for the slow release of drug in the field of medicine.

Smart cleaning cotton fabrics cross-linked with thermo-responsive and flexible poly(2-(2-methoxyethoxy)ethoxyethyl methacrylate-co-ethylene glycol methacrylate)

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38382-38390 ◽  
Author(s):  
Q. Zhong ◽  
Y. Y. Chen ◽  
S. L. Guan ◽  
Q. S. Fang ◽  
T. Chen ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Random Copolymer ◽  
Cotton Fabrics ◽  
Cross Linking ◽  
Glycol Methacrylate

The smart cleaning ability of cotton fabrics is realized by cross-linking thermo-responsive random copolymer to the cotton.

scholarly journals Upconversion Nanoparticles Encapsulated with Molecularly Imprinted Amphiphilic Copolymer as a Fluorescent Probe for Specific Biorecognition

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3522
Author(s):  
Hsiu-Wen Chien ◽  
Chien-Hsin Yang ◽  
Yan-Tai Shih ◽  
Tzong-Liu Wang
Keyword(s):  
Fluorescent Probe ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Random Copolymer ◽  
Random Copolymers ◽  
Upconversion Nanoparticles ◽  
Amphiphilic Copolymers ◽  
Molecularly Imprinted ◽  
Light Region ◽  
Copolymer Poly

A fluorescent probe for specific biorecognition was prepared by a facile method in which amphiphilic random copolymers were encapsulated with hydrophobic upconversion nanoparticles (UCNPs). This method quickly converted the hydrophobic UCNPs to hydrophilic UNCPs. Moreover, the self-folding ability of the amphiphilic copolymers allowed the formation of molecular imprinting polymers with template-shaped cavities. LiYF4:Yb3+/Tm3+@LiYF4:Yb3+ UCNP with up-conversion emission in the visible light region was prepared; this step was followed by the synthesis of an amphiphilic random copolymer, poly(methacrylate acid-co-octadecene) (poly(MAA-co-OD)). Combining the UCNPs and poly(MAA-co-OD) with the templates afforded a micelle-like structure. After removing the templates, UCNPs encapsulated with the molecularly imprinted polymer (MIP) (UCNPs@MIP) were obtained. The adsorption capacities of UCNPs@MIP bound with albumin and hemoglobin, respectively, were compared. The results showed that albumin was more easily bound to UCNPs@MIP than to hemoglobin because of the effect of protein conformation. The feasibility of using UCNPs@MIP as a fluorescent probe was also studied. The results showed that the fluorescence was quenched when hemoglobin was adsorbed on UCNPs@MIP; however, this was not observed for albumin. This fluorescence quenching is attributed to Förster resonance energy transfer (FRET) and overlap of the absorption spectrum of hemoglobin with the fluorescence spectrum of UCNPs@MIP. To our knowledge, the encapsulation approach for fabricating the UCNPs@MIP nanocomposite, which was further used as a fluorescent probe, might be the first report on specific biorecognition.

scholarly journals Poly(ethylene glycol) brush-b-poly(N-vinylpyrrolidone)-based double hydrophilic block copolymer particles crosslinked via crystalline α-cyclodextrin domains

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 4993-5001 ◽  
Author(s):  
Noah Al Nakeeb ◽  
Zdravko Kochovski ◽  
Tingting Li ◽  
Youjia Zhang ◽  
Yan Lu ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Glycol ◽  
Self Assembly ◽  
Poly Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Oligoethylene Glycol ◽  
Poly Ethylene ◽  
Copolymer Poly

Self-assembly of the double hydrophilic block copolymer poly(N-vinylpyrrolidone)-b-poly(oligoethylene glycol methacrylate) and supramolecular crosslinking via α-cyclodextrin in water is presented.

Cyclohexyl Methacrylate with Tetra (Ethylene Glycol) Dimethacrylate in Tertahydrofuran Radical Copolymerization

2009 ◽  
Vol 609 ◽  
pp. 63-67 ◽  
Author(s):  
Asmahane Fasla ◽  
Seghier Ould Kada ◽  
Zoubida Seghier ◽  
Alain Périchaud
Keyword(s):  
Ethylene Glycol ◽  
Specific Activity ◽  
13C Nmr Spectroscopy ◽  
Radical Copolymerization ◽  
Ethylene Glycol Dimethacrylate ◽  
Random Copolymers ◽  
Glycol Dimethacrylate ◽  
Free Radical Copolymerization ◽  
Tetrahydrofuran Solution ◽  
Cyclohexyl Methacrylate

Free-radical copolymerization of cyclohexyl methacrylate (CHMA) and tetra (ethylene glycol) dimethacrylate (TtEGDMA) were carried out at 60 °C in tetrahydrofuran solution in presence of 2,2-azobisisobutyronitrile. The random copolymers were prepared with nominal crosslinking ratios, X of 1, 5 and 10% mol TtEGDMA / mol CHMA. The copolymers were characterized by 13C NMR spectroscopy. The copolymers was characterized by 13C RMN analysis and determined the copolymers composition. The monomer reactivity ratios r1 (TtEGDMA) and r2 (CHMA) were determined with the linearized copolymerization equations of the Fineman–Ross methods (r1 = 1.77 and r2 = 0.48) and Kelen–Tüdös (r1 = 1.81 and r2 = 0.46). Parameters of Alfrey-Price Q1 = - 1.10 (specific activity) and e1= - 0.64 (polarity) for TtEGDMA.

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