Non-covalent functionalization of graphene oxide by pyrene-block copolymers for enhancing physical properties of poly(methyl methacrylate)

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79947-79955 ◽  
Author(s):  
Shiqiang Song ◽  
Chaoying Wan ◽  
Yong Zhang
Keyword(s):  
Graphene Oxide ◽  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Physical Properties ◽  
Covalent Functionalization ◽  
Poly Methyl Methacrylate ◽  
Arget Atrp

Pyrene-functionalized poly(methyl methacrylate)-block-polydimethylsiloxane (Py-PMMA-b-PDMS) copolymers were synthesized via ARGET ATRP method and further used to functionalize GO through the π–π interaction between pyrene and the carbon sheets.

scholarly journals Influence of HRGO Nanoplatelets on Behaviour and Processing of PMMA Bone Cement for Surgery

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2027
Author(s):  
Jaime Orellana ◽  
Ynés Yohana Pastor ◽  
Fernando Calle ◽  
José Ygnacio Pastor
Keyword(s):  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Bone Cement ◽  
Reduced Graphene Oxide ◽  
Sintering Temperature ◽  
Structural Function ◽  
Mechanical And Thermal Properties ◽  
Poly Methyl Methacrylate ◽  
Pmma Bone Cement ◽  
Reduced Graphene

Bone cement, frequently based on poly (methyl methacrylate), is commonly used in different arthroplasty surgical procedures and its use is essential for prosthesis fixation. However, its manufacturing process reaches high temperatures (up to 120 °C), producing necrosis in the patients' surrounding tissues. To help avoid this problem, the addition of graphene could delay the polymerisation of the methyl methacrylate as it could, simultaneously, favour the optimisation of the composite material's properties. In this work, we address the effect of different percentages of highly reduced graphene oxide with different wt.% (0.10, 0.50, and 1.00) and surface densities (150, 300, 500, and 750 m2/g) on the physical, mechanical, and thermal properties of commercial poly (methyl methacrylate)-based bone cement and its processing. It was noted that a lower sintering temperature was achieved with this addition, making it less harmful to use in surgery and reducing its adverse effects. In contrast, the variation of the density of the materials did not introduce significant changes, which indicates that the addition of highly reduced graphene oxide would not significantly increase bone porosity. Lastly, the mechanical properties (strength, elastic modulus, and fracture toughness) were reduced by almost 20%. Nevertheless, their typical values are high enough that these new materials could still fulfil their structural function. In conclusion, this paper presents a way to control the sintering temperature, without significant degradation of the mechanical performance, by adding highly reduced graphene oxide so that local necrosis of bone cement based on poly (methyl methacrylate) used in surgery is avoided.

scholarly journals Synthesis of Poly(methyl methacrylate)-b-poly(N-isopropylacrylamide) Block Copolymer by Redox Polymerization and Atom Transfer Radical Polymerization

2018 ◽  
Vol 18 (3) ◽  
pp. 537 ◽  
Author(s):  
Melahat Göktaş ◽  
Guodong Deng
Keyword(s):  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Gel Permeation Chromatography ◽  
High Yield ◽  
Resonance Spectroscopy ◽  
Atom Transfer ◽  
Poly Methyl Methacrylate ◽  
Redox Polymerization

Poly(methyl methacrylate)-b-poly(N-isopropylacrylamide) [PMMA-b-PNIPAM] block copolymers were obtained by a combination of redox polymerization and atom transfer radical polymerization (ATRP) methods in two steps. For this purpose, PMMA macroinitator (ATRP-macroinitiator) was synthesized by redox polymerization of methyl methacrylate and 3-bromo-1-propanol using Ce(NH4)2(NO3)6 as a catalyst. The synthesis of PMMA-b-PNIPAM block copolymers was carried out by means of ATRP of ATRP-macroinitiator and NIPAM at 60 °C. The block copolymers were obtained in high yield and high molecular weight. The characterization of products was accomplished by using multi instruments and methods such as nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, gel permeation chromatography, and thermogravimetric analysis.

Synthesis, Characterization of Modified Graphene Oxide/Poly(methyl methacrylate) Composites

2018 ◽  
Vol 60 (4) ◽  
pp. 530-539
Author(s):  
Yuying Tang ◽  
Hongwen Zhang ◽  
Huan Liu ◽  
Yu Cao ◽  
Jiayu Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Modified Graphene Oxide ◽  
Modified Graphene

Poly(methyl methacrylate)/Graphene Oxide Nanocomposites by a Precipitation Polymerization Process and Their Dielectric and Rheological Characterization

2014 ◽  
Vol 47 (6) ◽  
pp. 2149-2155 ◽  
Author(s):  
Jean-Michel Thomassin ◽  
Milana Trifkovic ◽  
Walid Alkarmo ◽  
Christophe Detrembleur ◽  
Christine Jérôme ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Precipitation Polymerization ◽  
Polymerization Process ◽  
Rheological Characterization ◽  
Poly Methyl Methacrylate
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