Bimodal “matrix-free” polymer nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14788-14795 ◽  
Author(s):  
Ying Li ◽  
Lei Wang ◽  
Bharath Natarajan ◽  
Peng Tao ◽  
Brian C. Benicewicz ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Polymer Brushes ◽  
Filler Loading ◽  
P Matrix ◽  
Matrix Free

“Matrix-free” nanocomposites with a bimodal population of polymer brushes for optimizing filler loading while maintaining controlled dispersion.

Mechanical and Self-Healing Behavior of Matrix-Free Polymer Nanocomposites Constructed via Grafted Graphene Nanosheets

Langmuir ◽  
2020 ◽  
Vol 36 (26) ◽  
pp. 7427-7438
Author(s):  
Minghui Liu ◽  
Sai Li ◽  
Yue Fang ◽  
Zhudan Chen ◽  
Maha Alyas ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Graphene Nanosheets ◽  
Self Healing ◽  
Matrix Free

scholarly journals Precise growth of polymer brushes on silica-based nanocomposites via visible-light-regulated controlled radical polymerization

2019 ◽  
Vol 7 (11) ◽  
pp. 6173-6179 ◽  
Author(s):  
Xue Li ◽  
Sunjie Ye ◽  
Ya Huang ◽  
Jia Le Li ◽  
Tao Cai
Keyword(s):  
Physicochemical Properties ◽  
Visible Light ◽  
Radical Polymerization ◽  
Polymer Nanocomposites ◽  
Polymer Brushes ◽  
Controlled Radical Polymerization ◽  
Crucial Importance ◽  
Grafted Polymer ◽  
Precise Control

Precise control over molecular variables of grafted polymer brushes is of crucial importance for obtaining polymer nanocomposites with desirable architectures and physicochemical properties, yet it remains a significant synthetic challenge.

Refractive Index Engineering of Polymer Nanocomposites Prepared by End-grafted Polymer Chains onto Inorganic Nanoparticles

2011 ◽  
Vol 1359 ◽  
Author(s):  
Peng Tao ◽  
Anand Viswanath ◽  
Yu Li ◽  
Atri Rungta ◽  
Brian C. Benicewicz ◽  
...  
Keyword(s):  
Refractive Index ◽  
Polymer Nanocomposites ◽  
Polymer Brushes ◽  
Raft Polymerization ◽  
Weight Percent ◽  
High Refractive Index ◽  
Inorganic Nanoparticles ◽  
Polymer Chains ◽  
Hybrid Particles ◽  
Grafted Polymer

ABSTRACTTransparent polymer nanocomposites with high refractive index were prepared by grafting polymer chains onto TiO2 nanoparticles. Reversible addition-fragmentation chain transfer (RAFT) polymerization was used to prepare poly(methyl methacrylate) (PMMA) polymer brushes grafted from TiO2 nanoparticles. The refractive index of the hybrid material increased from 1.49 for neat PMMA to 1.6 by increasing the loading of TiO2 to 40 weight percent. UV-vis spectra showed that grafted particles had a transparency of more than 90% in the visible light range. The hybrid particles can be processed into transparent, high refractive index coatings and self-standing films. The grafted TiO2 nanoparticles can also be easily dispersed into a polymer matrix forming thick, robust transparent polymer nanocomposites.

scholarly journals Effect of filler loading, geometry, dispersion and temperature on thermal conductivity of polymer nanocomposites

2017 ◽  
Vol 57 ◽  
pp. 101-106 ◽  
Author(s):  
Addis Tessema ◽  
Dan Zhao ◽  
Joseph Moll ◽  
Shansan Xu ◽  
Ronggui Yang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Polymer Nanocomposites ◽  
Filler Loading

scholarly journals Antiwear Performance Evaluation of Halloysite Nanotube (HNT) Filled Polymer Nanocomposites

2019 ◽  
Vol 9 (1) ◽  
pp. 3314-3321
Keyword(s):  
Wear Rate ◽  
Polymer Nanocomposites ◽  
Friction And Wear ◽  
Filler Loading ◽  
Operating Conditions ◽  
Specific Wear Rate ◽  
Material Loss ◽  
Pin On Disc ◽  
Automotive Parts ◽  
Track Diameter

Polymer nanocomposites containing various types of reinforcements and fillers are oftenly used in applications such as sliding elements in the machine and automotive parts, gear assemblies etc., in which tribological performance parameters viz. friction and wear are the major issues. In this work, the specific wear rate of HNT filler loading (0-4wt %) in Glass-Epoxy nanocomposites fabricated by vacuum bagging technique are evaluated experimentally. For this purpose, the specimens are prepared and tests are conducted as per the ASTM G-99 standard for a number of trials with the assistance of a pin-on-disc machine by varying load and speed values, keeping time and track diameter constant. The results obtained from experiments reveals that reduction in specific wear rate and the amount of material loss is quite significant for HNT loaded specimens when compared with neat sample even at higher operating conditions. This indicates that HNT comprises of hard ceramic elements viz. SiO2 and Al2O3 which eventually enhances the antiwear behaviour of prepared nanocomposites. Finally, a study on wear mechanisms and morphologies are carried out by analyzing the worn surfaces through SEM micrographs.

scholarly journals Surface Functionalization of Graphene Oxide with Polymer Brushes for Improving Thermal Properties of the Polymer Matrix

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Shuangshuang Wang ◽  
Houfang Chi ◽  
Lin Chen ◽  
Wei Li ◽  
Yuchao Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Conductivity ◽  
Thermal Stability ◽  
Graphene Oxide ◽  
Thermal Properties ◽  
Polymer Nanocomposites ◽  
Photoelectron Spectroscopy ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Gravimetric Analysis

In this work, polymethyl methacrylate (PMMA) and polystyrene (PS) with controlled structures would be grafted on graphene material. The hybrid materials were prepared by coating graphene oxide (GO) with polydopamine (PDA) as a reactive underlayer and reducing agent, subsequently, surface-initiated polymerization of monomers (methyl methacrylate, styrene) based on the activators regenerated electron transfer atom transfer radical polymerization (ARGET-ATRP) technique. The polymer brush-modified graphene materials were then incorporated into the PMMA or PS matrix to get polymer nanocomposites with better thermal properties. The results of Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA) demonstrated that PMMA and PS chains were successfully anchored on the surfaces of functionalized GO sheets. The influence of the grafted polymer brush-modified GO on thermal stability of PMMA and PS was investigated by a simultaneous thermal analyzer. Thermal conductivity of the polymer nanocomposite was determined by a conductive calorimeter. The results showed that thermal stability, glass transition temperature ( T g ), and thermal conductivity of the polymer nanocomposites were obviously improved compared with pure PMMA or PS.

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