scholarly journals Poly (Triethylene Glycol Methyl Ether Methacrylate) Hydrogel as Carriers of Phosphotungstic Acid for Acid Catalytic Reaction in Water

2021 ◽  
Author(s):  
JunJie Zhu ◽  
Takehiko Gotoh ◽  
Satoshi Nakai ◽  
Nao Tsunoji ◽  
Masahiro Sadakane

An H3PW12O40-polymer composite was synthesized from a mixture of triethylene glycol methyl ether metacrylate monomer, triethylene glycol dimethacrylate crosslinker, and H3PW12O40. The heteropoly acid molecules were trapped in the hydrogel...

2009 ◽  
Vol 42 (16) ◽  
pp. 5976-5982 ◽  
Author(s):  
Hong-Jun Yang ◽  
Bi-Biao Jiang ◽  
Wen-Yan Huang ◽  
Dong-Liang Zhang ◽  
Li-Zhi Kong ◽  
...  

2020 ◽  
Vol 7 (4) ◽  
pp. 229-232
Author(s):  
O. A. Karsakova ◽  
M. V. Kuzmin

In this work, photocurable protective coatings based on methacrylic acid esters have been developed and their physical and mechanical properties have been investigated. The photocurable compositions were obtained by mixing at different ratios the following methacrylic acid esters: polyethylene glycol dimethacrylate 400 and triethylene glycol dimethacrylate ether, polyethylene glycol dimethacrylate 400 and oligourethane dimethacrylate, polyethylene glycol dimethacrylate 400 and pentaerythritol tetraacrylate. For the obtained compositions, the viscosity was studied using a Brookfield rotary viscometer. To initiate polymerization, a mixture of initiators was used: benzoyl peroxide and benzoin. Curing of the obtained compositions was carried out under the influence of UV rays for 2-5 minutes. For photo-cured compositions, their physical and mechanical properties have been studied. It was found that the composition based on polyethylene glycol dimethacrylate modified with triethylene glycol dimethacrylate at a ratio of 70:30 has the highest strength.


2021 ◽  
Vol 873 ◽  
pp. 53-58
Author(s):  
Yang Yi Chen ◽  
Min Pan ◽  
Shan Hong Hu ◽  
Qi Huan ◽  
Chu Yang Zhang

The surface wettability of thermo-responsive random poly (ethylene glycol methyl ether methacrylate-co-triethylene glycol methyl ether methacrylate), abbreviated as P(MEOMA-co-MEO3MA), was investigated in thin film. UV-Vis spectroscopy shows that the LCST of P(MEOMA-co-MEO3MA) with molar ratios of 0:20, 6:14 and 9:11 were 43°C, 32 oC and 25 oC, respectively. LCST shifts towards lower temperature when molar ratio of MEOMA increases. ATR-FTIR indicates that P(MEOMA-co-MEO3MA) thin film experienced a collapse when the temperature passes its LCST. The contact angle of the paraffin oil on the film decreases 15o when the temperature is above its LCST, which confirms the surface wettability can be controlled. Atomic force microscopy shows the surface of the swollen thin film becomes rougher when above it LCST.


2019 ◽  
Vol 61 (2) ◽  
pp. 186-193 ◽  
Author(s):  
S. V. Kurmaz ◽  
N. V. Fadeeva ◽  
A. A. Grishchuk ◽  
E. I. Knerel’man ◽  
G. I. Davydova

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