scholarly journals Rubber-toughened epoxy loaded with carbon nanotubes: structure–property relationships

2010 ◽  
Vol 45 (10) ◽  
pp. 2633-2639 ◽  
Author(s):  
Maria d. M. Salinas-Ruiz ◽  
Alex A. Skordos ◽  
Ivana K. Partridge
Author(s):  
Barbara A. Wood

A controversial topic in the study of structure-property relationships of toughened polymer systems is the internal cavitation of toughener particles resulting from damage on impact or tensile deformation.Detailed observations of the influence of morphological characteristics such as particle size distribution on deformation mechanisms such as shear yield and cavitation could provide valuable guidance for selection of processing conditions, but TEM observation of damaged zones presents some experimental difficulties.Previously published TEM images of impact fractured toughened nylon show holes but contrast between matrix and toughener is lacking; other systems investigated have clearly shown cavitated impact modifier particles. In rubber toughened nylon, the physical characteristics of cavitated material differ from undamaged material to the extent that sectioning of heavily damaged regions by cryoultramicrotomy with a diamond knife results in sections of greater than optimum thickness (Figure 1). The detailed morphology is obscured despite selective staining of the rubber phase using the ruthenium trichloride route to ruthenium tetroxide.


Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 1128-1137 ◽  
Author(s):  
Alicia Moya ◽  
Mercedes Hernando-Pérez ◽  
Marta Pérez-Illana ◽  
Carmen San Martín ◽  
Julio Gómez-Herrero ◽  
...  

Hybridization of imine-based covalent organic framework (COF-300) on oxidized MWCNT surface have been designed and succesfully developed for the first time in one-pot chemical synthesis.


MRS Bulletin ◽  
2007 ◽  
Vol 32 (4) ◽  
pp. 348-353 ◽  
Author(s):  
Karen I. Winey ◽  
Takashi Kashiwagi ◽  
Minfang Mu

AbstractThe remarkable electrical and thermal conductivities of isolated carbon nanotubes have spurred worldwide interest in using nanotubes to enhance polymer properties. Electrical conductivity in nanotube/polymer composites is well described by percolation, where the presence of an interconnected nanotube network corresponds to a dramatic increase in electrical conductivity ranging from 10−5 S/cm to 1 S/cm. Given the high aspect ratios and small diameters of carbon nanotubes, percolation thresholds are often reported below 1 wt% although nanotube dispersion and alignment strongly influence this value. Increases in thermal conductivity are modest (∼3 times) because the inter facial thermal re sis tance between nanotubes is considerable and the thermal conductivity of nanotubes is only 104 greater than the polymer, which forces the matrix to contribute more toward the composite thermal conductivity, as compared to the contrast in electrical conductivity, >1014. The nanotube network is also valuable for improving flame-retardant efficiency by producing a protective nanotube residue. In this ar ticle, we highlight published research results that elucidate fundamental structure–property relationships pertaining to electrical, thermal, and/or flammability properties in numerous nanotube-containing polymer composites, so that specific applications can be targeted for future commercial success.


1992 ◽  
Vol 44 (11) ◽  
pp. 1883-1892 ◽  
Author(s):  
P. Laurienzo ◽  
M. Malinconico ◽  
E. Martuscelli ◽  
G. Ragosta ◽  
M. G. Volpe

1989 ◽  
Vol 29 (20) ◽  
pp. 1466-1476 ◽  
Author(s):  
J.-F. Hwang ◽  
J. A. Manson ◽  
R. W. Hertzberg ◽  
G. A. Miller ◽  
L. H. Sperling

Carbon ◽  
2014 ◽  
Vol 66 ◽  
pp. 219-226 ◽  
Author(s):  
Go Yamamoto ◽  
Keiichi Shirasu ◽  
Yo Nozaka ◽  
Yoshinori Sato ◽  
Toshiyuki Takagi ◽  
...  

2009 ◽  
Vol 47 (8) ◽  
pp. 764-774 ◽  
Author(s):  
Emmanuel Logakis ◽  
Christos Pandis ◽  
Vasilios Peoglos ◽  
Polycarpos Pissis ◽  
Charalampos Stergiou ◽  
...  

1992 ◽  
Vol 274 ◽  
Author(s):  
A. C. Archer ◽  
P. A. Lovell ◽  
J. McDonald ◽  
M. N. Sherratt ◽  
R. J. Young

ABSTRACTRubber-toughened poly(methyl methacrylate) materials have been prepared by blending poly(methyl methacrylate) with specially-synthesised, refractive index matched particles containing two, three and four radially-alternating rubbery and glassy layers. The paper describes the effects upon mechanical properties of (i) two-, three- and four-layer particle structure and (ii) particle diameter and glassy core size for three-layer particles.


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