Organic-acid-catalyzed sol-gel route for preparing poly(methyl methacrylate)-silica hybrid materials

2008 ◽  
Vol 110 (4) ◽  
pp. 2108-2114 ◽  
Author(s):  
Jui-Ming Yeh ◽  
Kuan-Yeh Huang ◽  
Chung-Feng Dai ◽  
B. G. Chand ◽  
Chang-Jian Weng
Keyword(s):  
Methyl Methacrylate ◽  
Organic Acid ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Poly Methyl Methacrylate ◽  
Acid Catalyzed ◽  
Silica Hybrid

Poly(Methyl Methacrylate)-Titania Hybrid Materials by Sol-Gel Processing

1996 ◽  
Vol 435 ◽  
Author(s):  
Jun Zhang ◽  
Shengcheng Luo ◽  
Linlin Gui ◽  
Youqi Tang
Keyword(s):  
Methyl Methacrylate ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Poly Methyl Methacrylate ◽  
Gel Processing

Synthesis of Poly(methyl Methacrylate)-Silica Hybrid Materials through Activators Generated by Electron Transfer

2011 ◽  
Vol 233-235 ◽  
pp. 2185-2188
Author(s):  
Shi Xin Du ◽  
Guo Wei Zhou ◽  
Xi Liang Wang ◽  
Lei Zhang
Keyword(s):  
Electron Transfer ◽  
Ascorbic Acid ◽  
Methyl Methacrylate ◽  
Hybrid Materials ◽  
Pmma Layer ◽  
Aget Atrp ◽  
Poly Methyl Methacrylate ◽  
Silica Surfaces ◽  
Silica Core ◽  
Silica Hybrid

Activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP) of methyl methacrylate (MMA) on silica nanoparticles were conducted to create controllable shell on silica surfaces. SiO2–Br, the macroinitiator, was prepared by the reaction of amido groups previously indroduced on silica with 2-bromoisobutyryl bromide, followed by the ATRP of MMA using CuBras the catalyst and ascorbic acid (VC) as the reducing agent in the presence of a limited amount of air. The resulting particles were examined by SEM and TEM. The results indicated that the particles were composed of a silica core and a densely grafted outer poly(methyl methacrylate) (PMMA) layer.

Organic base-catalyzed sol–gel route to prepare PMMA–silica hybrid materials

2007 ◽  
Vol 56 (3) ◽  
pp. 343-349 ◽  
Author(s):  
Jui-Ming Yeh ◽  
Chi-Fa Hsieh ◽  
Chia-Wen Yeh ◽  
Mei-Jyun Wu ◽  
Hsing-Chung Yang
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Organic Base ◽  
Silica Hybrid

Formation of aramid-silica-grafted-multi-walled carbon nanotube-based nanofiber via the sol-gel route: thermal and mechanical profile of hybrids with poly(methyl methacrylate)

e-Polymers ◽  
2014 ◽  
Vol 14 (3) ◽  
pp. 177-185
Author(s):  
Ayesha Kausar
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Sol Gel ◽  
Tensile Modulus ◽  
Electrospun Nanofibers ◽  
Decomposition Temperature ◽  
Filler Loading ◽  
Silica Network ◽  
Poly Methyl Methacrylate ◽  
Multi Walled Carbon Nanotube

AbstractIn this study, thermally and mechanically stable poly(methyl methacrylate) (PMMA)-based nanocomposites were produced through the reinforcement of electrospun aramid-silica-grafted multi-walled carbon nanotube-based nanofibers (MWCNT-Ar-Si). The multi-walled carbon nanotube was initially modified to prepare an isocyanatopropyltriethoxysilane-grafted MWCNT via the sol-gel route using 3-isocyanatopropyl-triethoxysilane and tetraethoxysilane (TEOS). The silica network was developed and linked to MWCNT by hydrolysis and condensation of TEOS. The said isocyanatopropyltriethoxysilane-grafted MWCNT was electrospun with the aramid solution. The electrospun MWCNT-Ar-Si nanofibers (0.1–1 wt.%) were then reinforced in a PMMA matrix. For comparative analysis, PMMA was also reinforced with 0.1–1 wt.% of aramid nanofibers. The tensile modulus of PMMA/MWCNT-Ar-Si 0.1 was 5.11 GPa, which was increased to 13.1 GPa in PMMA/MWCNT-Ar-Si 1. The 10% decomposition temperature of PMMA/MWCNT-Ar-Si 0.1–1 hybrids was in the range of 479–531°C. The glass transition temperature, determined from the maxima of tan δ data using dynamic mechanical thermal analysis, showed an increase with the filler loading and was maximum (301°C) for PMMA/MWCNT-Ar-Si 1 with 1 wt.% of MWCNT-Ar-Si nanofibers. In contrast, PMMA/Ar 0.1–1 hybrids showed lower values in the thermal and the mechanical profile depicting the combined effect of nanotube and aramid in electrospun nanofibers.

Behavior of a sol–gel hybrid film on poly(methyl methacrylate) blend polyurethane sheets

2020 ◽  
Vol 21 ◽  
pp. 100764
Author(s):  
Narumol Kreua-ongarjnukool ◽  
Pitchapa Pittayavinai ◽  
Nopparuj Soomherun
Keyword(s):  
Methyl Methacrylate ◽  
Hybrid Film ◽  
Sol Gel ◽  
Poly Methyl Methacrylate

Homogeneous phase synthesis of chitosan silica hybrid materials in ionic liquid medium and adsorption of Fe(III) from aqueous solutions

2019 ◽  
Vol 38 (9) ◽  
pp. 586-597 ◽  
Author(s):  
Ananda S. Amarasekara ◽  
Deping Wang
Keyword(s):  
Ionic Liquid ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Phase Reaction ◽  
Phase Synthesis ◽  
Homogeneous Phase ◽  
Sol Gel Process ◽  
Hydrolysis Of ◽  
Silica Hybrid ◽  
Ionic Liquid Medium

Two chitosan silica hybrid materials were prepared by a two-step process in 78–84% yields using the homogeneous phase reaction of 3-(triethoxysilyl)propyl isocyanate with chitosan dissolved in 1-n-butyl-3-methylimidazolium chloride ionic liquid (∼10% w/w), which was followed by NH4OH catalyzed hydrolysis of triethoxysilyl groups and then sol-gel process. These new hybrid materials were shown to adsorb up to about 95% of Fe3+ from 5 × 10−4 M aqueous solution at room temperature in 24 h.

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