Synergetic Toughening Effect of Carbon Nanotubes and β-Nucleating Agents on the Polypropylene Random Copolymer/Styrene-Ethylene-Butylene- Styrene Block Copolymer Blends

Polypropylene random co-polymer (PPR)/styrene-ethylene-butylene-styrene (SBS) block copolymer blends with high toughness and favorable tensile properties were successfully obtained by blending with traces of multi-wall carbon nanotubes (MWCNTs) and β-nucleating agents (β-NAs). β-NAs can effectively induce the ductile β-form crystal in the PPR matrix. Although the addition of MWCNTs was reported to be only benefit for the tensile strength of PPR and relatively disadvantageous for the toughness, the obviously synergistic toughening effect in PPR/SBS blends was found when MWCNTs and β-NAs coexisted. The notched izod impact strength of PPR/30 wt % SBS blend with MWCNTs and β-NAs increased from 11.3 to 58.9 kJ/m2; more than 5-fold increment compared with pure PPR. Meanwhile, the tensile strength retention of this PPR blend is still above 72.2%. The micro-morphology indicated that the MWCNTs can act as bridges between SBS particle and PPR matrix, effectively transferring the stress and absorbing impact energy among SBS particles.

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Compatibilization effect of a block copolymer in two random copolymer blends

Polymer ◽

10.1016/0032-3861(95)93927-e ◽

1995 ◽

Vol 36 (6) ◽

pp. 1243-1252 ◽

Cited By ~ 6

Author(s):

Jin Kon Kim

Keyword(s):

Block Copolymer ◽

Random Copolymer ◽

Copolymer Blends ◽

Compatibilization Effect

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Effect of Molecular Properties of Random Copolymers on the Stability and Domain Dimension of Block Copolymer/Random Copolymer Blends

The Journal of Physical Chemistry B ◽

10.1021/jp5062607 ◽

2014 ◽

Vol 118 (44) ◽

pp. 12763-12771 ◽

Cited By ~ 2

Author(s):

Chieh-Tsung Lo ◽

Po-Wei Chou

Keyword(s):

Block Copolymer ◽

Random Copolymer ◽

Molecular Properties ◽

Random Copolymers ◽

Copolymer Blends ◽

The Stability

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Effect of aspect ratio of multi-wall carbon nanotubes on the dispersion in ethylene-α-octene block copolymer and the properties of the Nanocomposites

Journal of Polymer Research ◽

10.1007/s10965-019-1915-1 ◽

2019 ◽

Vol 26 (12) ◽

Cited By ~ 2

Author(s):

Jing Qian ◽

Jun-Hong Pu ◽

Xiang-Jun Zha ◽

Rui-Ying Bao ◽

Zheng-Ying Liu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Block Copolymer ◽

Aspect Ratio ◽

Multi Wall Carbon Nanotubes

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Effect of Sidewall Fluorination on the Mechanical Properties of Catalytically Grown Multi-Wall Carbon Nanotubes

MRS Proceedings ◽

10.1557/opl.2011.225 ◽

2011 ◽

Vol 1284 ◽

Cited By ~ 1

Author(s):

Yogeeswaran Ganesan ◽

Cheng Peng ◽

Lijie Ci ◽

Valery Khabashesku ◽

Pulickel M. Ajayan ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Tensile Strength ◽

Electron Microscope ◽

Tensile Testing ◽

Load Bearing Capacity ◽

Multi Wall Carbon Nanotubes ◽

Pristine Mwnts ◽

Scanning Electron

ABSTRACTWe report on the usage of a simple microfabricateddevice, that works in conjunction with a quantitative nanoindenter inside a scanning electron microscope (SEM), for the in situ quantitative tensile testing of individual sidewall fluorinated multi-wall carbon nanotubes (MWNTs). The stress vs. strain curves and the tensile strength values for five fluorinated specimens have been presented and compared to those of pristine MWNT specimens (data reported earlier). The fluorinated specimens were found to deform and fail in a brittle fashion similar to pristine MWNTs. However, sidewall fluorination was found to have considerably degraded the mechanical properties (tensile strength and load bearing capacity) of the MWNTs.

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Carbon Nanotube Synthesis from Block Copolymer Deposited Catalyst

International Journal of High Speed Electronics and Systems ◽

10.1142/s0129156417400109 ◽

2017 ◽

Vol 26 (03) ◽

pp. 1740010

Author(s):

K. Woods ◽

J. Silliman ◽

T. C. Schwendemann

Keyword(s):

Carbon Nanotubes ◽

Chemical Vapor Deposition ◽

Carbon Nanotube ◽

Block Copolymer ◽

Vapor Deposition ◽

Metal Salt ◽

Chemical Vapor ◽

Multi Wall Carbon Nanotubes ◽

Metal Salt Solution ◽

Carbon Nanotube Synthesis

A block copolymer/metal-salt solution was used to deposit metal nanoparticles on substrates, from which carbon nanotubes (CNTs) were grown in a chemical vapor deposition (CVD) chamber. Mono and hybrid catalysts of Fe, Ni, and Co-nitrates were tested, and separately Co, Ni, and Cu-chlorides. In both cases cobalt/cobalt-hybrids produced the highest density of multi-wall carbon nanotubes (MWCNTs). Slight vertical growth, though sparse, was observed after growth at 800°C from a nickel catalyst on single-crystal aluminium oxide (~130nm diameter).

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Performances of epoxy-based composites with multi-wall carbon nanotubes and acrylic tri-block copolymer

Nanocomposites ◽

10.1080/20550324.2019.1601804 ◽

2019 ◽

Vol 5 (1) ◽

pp. 28-35 ◽

Cited By ~ 1

Author(s):

Hongfeng Li ◽

Zhongliang Liu ◽

Jiyou Gu ◽

Dezhi Wang ◽

Chunyan Qu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Block Copolymer ◽

Multi Wall Carbon Nanotubes

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Un-Bundled Carbon Nanotubes Reinforced Light Metal Composites via Powder Metallurgy Route

Materials Science Forum ◽

10.4028/www.scientific.net/msf.690.339 ◽

2011 ◽

Vol 690 ◽

pp. 339-342

Author(s):

Katsuyoshi Kondoh ◽

Thotsaphon Threrujirapapong ◽

Hiroyuki Fukuda ◽

Junko Umeda

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Tensile Strength ◽

Powder Metallurgy ◽

Pure Titanium ◽

Hot Extrusion ◽

Light Metal ◽

Dispersion Strengthening ◽

Multi Wall Carbon Nanotubes

By using light metal (Mg, Al, Ti) powders coated with un-bundled multi-wall carbon nanotubes (MWCNTs) via wet process, powder metallurgy (P/M) light metal matrix composite reinforced with un-bundled nanotubes was prepared by spark plasma sintering (SPS) and subsequently hot extrusion process. The microstructure and mechanical properties of the composites were evaluated. In the case of pure titanium, the distribution of CNTs and in-situ formed titanium carbide (TiC) compounds during sintering was investigated by optical and scanning electron microscopy (SEM) equipped with EDS analyzer. The mechanical properties of TMC were significantly improved by the additive of CNTs. For example, when employing the pure titanium composite powder coated with CNTs of 0.35 mass%, the increase of tensile strength and yield stress of the extruded TMC was 157 MPa and 169 MPa, respectively, compared to those of extruded titanium materials with no CNT additive. Fractured surfaces of tensile specimens were analyzed by SEM, and the uniform distribution of CNTs and TiC particles, being effective for the dispersion strengthening, at the surface of the TMC were obviously observed. In the case of Mg-Al alloys, in-situ formation of Al2MgC2compounds at the interface between CNTs and Mg-matrix occurred and effective for the tensile transfer loading, and resulted in the increment of tensile strength of the composite material.

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MoO3 Nanobelts Embedded Polypyrrole/SIS Copolymer Blends for Improved Electro-Mechanical Dual Applications

Polymers ◽

10.3390/polym12020353 ◽

2020 ◽

Vol 12 (2) ◽

pp. 353 ◽

Cited By ~ 1

Author(s):

Arslan Umer ◽

Faroha Liaqat ◽

Azhar Mahmood

Keyword(s):

Thin Film ◽

Tensile Strength ◽

Block Copolymer ◽

Electrical Properties ◽

Polymeric Nanocomposites ◽

Copolymer Blends ◽

Mechanical And Electrical Properties ◽

Eds Analysis ◽

Good Potential ◽

Research Endeavor

This research endeavor aimed to develop thin film blends of polypyrrole (PPy) and poly (styrene-isoprene-styrene) (SIS) with MoO3 as a nanofiller for improved mechanical and electrical properties to widen its scope in the field of mechatronics. This study reports blends of polypyrrole (PPy) and poly (styrene-isoprene-styrene) (SIS) tri-block copolymer showing improved mechanical and electrical attributes while employing MoO3 nanobelts as nanofillers that additionally improves the abovementioned properties in the ensuing nanocomposites. The synthesis of PPy/SIS blends and MoO3/PPy/SIS nanocomposites was well corroborated with XRD, SEM, FTIR, and EDS analysis. Successful blending of PPy was yielded up to 15 w/w% PPy in SIS, as beyond this self-agglomeration of PPy was observed. The results showed a remarkable increase in the conductivity of insulating SIS copolymer from 1.5 × 10−6.1 to 0.343 Scm−1 and tensile strength up to 8.5 MPa with the 15 w/w% PPy/SIS blend. A further enhancement of the properties was recorded by embedding MoO3 nanobelts with varying concentrations of the nanofillers into 15 w/w% PPy/SIS blends. The mechanical strength of the polymeric nanocomposites was enhanced up to 11.4 MPa with an increase in conductivity up to 1.51 Scm−1 for 3 w/w% MoO3/PPy-SIS blends. The resultant product exhibited good potential for electro-mechanical dual applications.

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Incorporation of Multi Wall Carbon Nanotubes into Glass-Surfaces via Laser-Treatment

MRS Proceedings ◽

10.1557/proc-772-m2.8 ◽

2003 ◽

Vol 772 ◽

Cited By ~ 1

Author(s):

T. Seeger ◽

G. de la Fuente ◽

W.K. Maser ◽

A.M. Benito ◽

A. Righi ◽

...

Keyword(s):

Carbon Nanotubes ◽

Continuous Wave ◽

Silica Surface ◽

Multi Wall Carbon Nanotubes ◽

Composite Formation ◽

Multi Walled Carbon Nanotubes ◽

Glass Surfaces ◽

Walled Carbon Nanotubes ◽

First Time ◽

Scanning Electron

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

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