Self-assembly of miscible homopolymer/quasi-block copolymer blends/MWNT composites: a strategy to obtain ultralow electrical percolation threshold and mechanism

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 15841-15843
Author(s):  
Ri Xu ◽  
Xuecheng Xu
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Percolation Threshold ◽  
Self Assembly ◽  
Temperature Variations ◽  
Electrical Percolation ◽  
Copolymer Blends ◽  
Miscible Polymer Blends ◽  
Electrical Percolation Threshold

We utilized self-assembly of miscible polymer blends/CNTs composites to obtain ultralow electrical percolation threshold, with different results of both miscibility and glass transition temperature variations from antecedent works.

scholarly journals Chain Arrangement and Glass Transition Temperature Variations in Polymer Nanoparticles under 3D-Confinement

2013 ◽  
Vol 46 (11) ◽  
pp. 4698-4705 ◽  
Author(s):  
Daniel E. Martínez-Tong ◽  
Michelina Soccio ◽  
Alejandro Sanz ◽  
Carolina García ◽  
Tiberio A. Ezquerra ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Polymer Nanoparticles ◽  
Temperature Variations

Spatial control of the topography of photo-sensitive block copolymer thin films

2019 ◽  
Vol 10 (23) ◽  
pp. 3135-3145 ◽  
Author(s):  
Lewis C. Chambers ◽  
Yun Huang ◽  
Kevin S. Jack ◽  
Idriss Blakey
Keyword(s):  
Thin Films ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Block Copolymer ◽  
Molecular Interactions ◽  
Self Assembly ◽  
Spatial Control

Spatially controlling self-assembly of block copolymer thin films through photoinduced molecular interactions that significantly impact on the glass transition temperature.

scholarly journals Phenyl acrylate is a versatile monomer for the synthesis of acrylic diblock copolymer nano-objects via polymerization-induced self-assembly

2017 ◽  
Vol 8 (33) ◽  
pp. 4811-4821 ◽  
Author(s):  
S. L. Canning ◽  
V. J. Cunningham ◽  
L. P. D. Ratcliffe ◽  
S. P. Armes
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
High Glass Transition Temperature

Poly(phenyl acrylate) has a sufficiently high glass transition temperature to enable TEM studies of the morphology of diblock copolymer nano-objects prepared using three different polymerization-induced self-assembly (PISA) formulations.

Characterization of Thermo-Electric Interface Material with Carbon Nanotubes

2007 ◽  
Vol 1056 ◽  
Author(s):  
Piyush R Thakre ◽  
Yordanos Bisrat ◽  
Dimitris C Lagoudas
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Epoxy Matrix ◽  
Loss Modulus ◽  
Single Wall Carbon Nanotubes ◽  
Electrical Percolation

ABSTRACTAn approach has been presented in the current work to fabricate and characterize nanocomposite systems for optimizing electrical and thermal properties without sacrificing mechanical properties. An epoxy matrix based nanocomposite system has been processed with different volume fractions of carbon nanotubes. The purpose was to tailor macroscale properties to meet competing performance requirements in microelectronics industy. The nanofiller consisted of comparatively low cost XD grade carbon nanotubes (XD-CNTs) that are optimized for electrical properties. This system was compared with another system consisting of single wall carbon nanotubes (SW-CNTs) as nano-reinforcements in epoxy matrix. The electrical percolation threshold (about seven orders of magnitude increase in electrical conductivity) measured by dielectric spectroscopy was found to be at lower loading weight fraction of SWCNTs (0.015 weight %) as compared to XD-CNTs (0.0225 weight %). However, the electrical conductivity after percolation was higher for XD-CNTs reinforced epoxy with respect to SW-CNTs filled nanocomposites. The governing mechanisms for this phenomenon were investigated using transmission optical microscope. The enhancement in thermal conductivity, measured using differential scanning calorimetry, was found to be moderate at lower weight loadings corresponding to electrical percolation. However, a 90% improvement in thermal conductivity was observed for 0.3 weight percent of XD-CNTs. Dynamic mechanical analysis was performed to measure the storage and loss modulus along with the glass transition temperature. No significant change in modulus values and glass transition temperature was measured for nanocomposites varied filler contents with respect to neat matrix.

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