Dispersion monitoring of carbon nanotube modified epoxy systems

2012 ◽  
Author(s):  
G. Gkikas ◽  
Ch. Saganas ◽  
S. A. Grammatikos ◽  
Gh. M. Maistros ◽  
N.-M. Barkoula ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Modified Epoxy ◽  
Epoxy Systems

Effect of carbon nanotube modified epoxy adhesive on CFRP-to-steel interface

2015 ◽  
Vol 79 ◽  
pp. 95-104 ◽  
Author(s):  
Asghar H. Korayem ◽  
Chen Yang Li ◽  
Qian Hui Zhang ◽  
Xiao Ling Zhao ◽  
Wen Hui Duan
Keyword(s):  
Carbon Nanotube ◽  
Epoxy Adhesive ◽  
Modified Epoxy

scholarly journals PPG-Terminated Tetra-Carbamates as the Toughening Additive for Bis-A Epoxy Resin

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1522
Author(s):  
Ming Zhang ◽  
Mingqing Chen ◽  
Zhongbin Ni
Keyword(s):  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Microphase Separation ◽  
Intramolecular Interactions ◽  
Hexamethylene Diisocyanate ◽  
Separation Mechanism ◽  
Toughening Mechanism ◽  
The Impact ◽  
Modified Epoxy ◽  
Epoxy Systems

We synthesized PPG-terminated tetra-carbamates as a new toughening additive for epoxy thermosets through facile addition reaction of hexamethylene diisocyanate (HDI) with poly(tetra-methylene glycols) (PTMG) and poly(propylene glycols) (PPG). The effects of prepared tetra-carbamates on the rheological behavior of neat epoxy resin were studied along with the various cured properties of their modified epoxy systems. Four carbamate groups (–NHCOO–) endow the prepared additives not only with good intramolecular interactions, but also with optimal intermolecular interactions with epoxy polymers. This results in the suitable miscibility of the additives with the epoxy matrix for the formation of the typical biphasic structure of microparticles dispersed in the epoxy matrix via polymerization-induced microphase separation. The impact strength and critical stress concentration factor (KIC) of cured modified epoxy systems with the additives are significantly higher than those of unmodified epoxy systems, without sacrificing the processability (Tg) and flexural strength. The toughening mechanism is understood as a synergism combination among the phase separation mechanism, the in situ homogeneous toughening mechanism, and the particle cavitation mechanism.

Rheological properties and irreversible dispersion changes in carbon nanotube/epoxy systems

2011 ◽  
Vol 52 (4) ◽  
pp. 849-855 ◽  
Author(s):  
Sonja Carolin Schulz ◽  
Jana Schlutter ◽  
Samuel T. Buschhorn ◽  
Karl Schulte ◽  
Wolfgang Bauhofer
Keyword(s):  
Carbon Nanotube ◽  
Rheological Properties ◽  
Epoxy Systems

Influence of temperature on tensile behavior of multiwalled carbon nanotube modified epoxy nanocomposites

2014 ◽  
Vol 29 (15) ◽  
pp. 1635-1641
Author(s):  
Aroor Revathi ◽  
Sandhya Rao ◽  
Kavitha V. Rao ◽  
Myadam Rajendra Prakash ◽  
Mohanraj Sendil Murugan ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Tensile Behavior ◽  
Multiwalled Carbon Nanotube ◽  
Epoxy Nanocomposites ◽  
Multiwalled Carbon ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Image Position ◽  
Modified Epoxy

Abstract

Ageing of polyol-modified epoxy/diacidanhydride and anionically cured epoxy systems—A comparison

1989 ◽  
Vol 24 (4) ◽  
pp. 269-278 ◽  
Author(s):  
P. Förster ◽  
K.R. Hauschildt ◽  
J. Huber ◽  
G. Piecha ◽  
D. Pohl ◽  
...  
Keyword(s):  
Modified Epoxy ◽  
Epoxy Systems

Flexural behavior of carbon nanotube-modified epoxy/basalt composites

2011 ◽  
Vol 12 (3) ◽  
pp. 177-179 ◽  
Author(s):  
Man-Tae Kim ◽  
Kyong-Yop Rhee
Keyword(s):  
Carbon Nanotube ◽  
Flexural Behavior ◽  
Modified Epoxy

Bond Characterization of Steel-CFRP with Carbon Nanotube Modified Epoxy Adhesive via Pull-off Tests

2015 ◽  
Vol 15 (08) ◽  
pp. 1540027 ◽  
Author(s):  
Asghar H. Korayem ◽  
Yan Ming Liu ◽  
Xiao Ling Zhao ◽  
Wen Hui Duan
Keyword(s):  
Carbon Nanotube ◽  
Bond Strength ◽  
Steel Substrate ◽  
Epoxy Adhesive ◽  
Sem Analysis ◽  
Cfrp Laminates ◽  
Cfrp Sheets ◽  
Reinforced Polymer ◽  
Modified Epoxy

This paper presents an experimental investigation of the bond strength between carbon fiber reinforced polymer (CFRP) and steel substrate by utilizing the pull-off test and scanning electron microscope (SEM) analysis. A series of pull-off experiments was conducted by using three types of CFRP (CFRP sheets and CFRP laminates with/without woven mesh) and two types of epoxy adhesive (ductile and brittle epoxy adhesive) with/without carbon nanotube (CNT) modification. Pull-off samples with CFRP laminates possess higher (about double) bond strength than that of samples with CFRP sheets, due to the good saturation of fibers in the laminates. The steel-CFRP bond with ductile epoxy adhesive (Araldite 2011) is found to have about 16% higher bond strength when compared to that of brittle epoxy (MBrace Saturant), even though the tensile strength of Araldite 2011 is about 40% less than that of MBrace Saturant. Also, it is shown that modified epoxy with CNTs is more efficient than neat epoxy for bonding CFRP to steel at a moderately elevated temperature, and increasing the bond strength about twofold.

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