Mechanical characterization of epoxy composites modified with reactive polyol diluent and randomly-oriented amino-functionalized MWCNTs

Rahman, Muhammad M.; Hosur, Mahesh; Zainuddin, Shaik; Jajam, Kailash C.; Tippur, Hareesh V.; Jeelani, Shaik

doi:10.1016/j.polymertesting.2012.08.010

Cited by 56 publications

(49 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…have reported on kinetics of thermally inducted phase separation by light scattering for polymer–diluent system . A polyol diluent in randomly oriented amino‐functionalized multi‐wall CNTs (MWCNTs) for an epoxy matrix can assist in obtaining desired mechanical properties . Similarly, polyol can be used to influence the thermal properties of vulcanizates …”

Section: Introductionmentioning

confidence: 90%

Effects of thinner on RTV silicone rubber nanocomposites reinforced with GR and CNTs

Kumar

Lee

2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

The effects of thinner on rubber specimens with carbon nanotubes (CNTs) and graphitic nanofillers (GR) was studied for robotics applications. Rubber specimens were prepared by dispersing GR, CNTs and thinner in room temperature vulcanized (RTV) silicone rubber through solution mixing. Microscopic studies have confirmed occurrence of swelling in polymer chains due to migration of thinner. It results an increase in topological depth from 40 nm (no thinner) to 120 nm (40 phr of thinner). An elastic modulus of ~4.4 MPa (without thinner) was higher than 2.8 MPa (10 phr of thinner). At 100% strain, the lower dissipation losses of 110% (without thinner) and 70% (40 phr of thinner) were obtained. The resistance increases from 4.6 kΩ (without thinner) to 5.7 kΩ (10 phr of thinner). At 0.4‐mm‐thick elastomer slab, an actuation displacement of 0.81 mm (without thinner) was obtained which increased to 1.1 mm (60 phr of thinner). Thus, the thinner can be useful for easier processing, controlled stiffness, minimizing dissipation losses, increasing the actuation displacement and decreasing the cost of the device. Copyright © 2017 John Wiley & Sons, Ltd.

show abstract

Section: Introductionmentioning

confidence: 90%

Effects of thinner on RTV silicone rubber nanocomposites reinforced with GR and CNTs

Kumar

Lee

2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…The key proposal of this theory is that shear deformation is taking place either as shear bands or as a diffuse form of shear yielding initiated at stress concentrations resulting from the presence of rubber particles. This functions as the main basis of energy absorption and stimulates the improvement in toughness . The purpose of the rubber particles is to produce satisfactory triaxial tension in the matrix, so that it leads to increase in local free volume and thus permit shear yielding.…”

Section: Rubber Toughened Epoxy Compositesmentioning

confidence: 99%

Innovative materials of this era for toughening the epoxy matrix: A review

2018

View full text Add to dashboard Cite

This review aims to bring to light the potential efficiency of various materials as toughening agents for epoxy thermosets. The area of epoxy toughening has fascinated material scientists since toughened epoxies are employed as the appropriate candidates in a wide arena of applications. Based on the structure–property relationships, the traditional chemistry approaches have been tried so far to toughen the epoxy matrix. With the advent of the era of nanotechnology, the field of epoxy toughening has also gained momentum through the utilization of various types of modified and unmodified nanofillers in the epoxy matrix. In fact many new materials have replaced the conventional agents in the field of epoxy toughening. We are giving a comprehensive review which hints the various mechanisms of toughening as well as the novel materials used in the present scenario as potential toughening agents in the epoxy matrix with special reference to rubber, block copolymers, and nanofillers. POLYM. COMPOS., 39:E1959–E1986, 2018. © 2018 Society of Plastics Engineers

show abstract

“…Improvements of this order ($20%) have been reported earlier, but these are also associated with a decrease in the flexure stiffness. 18 Interestingly, the introduction of PET glycolysates had a positive impact on the material stiffness which was quantified in terms of the notched flexural modulus [ Figure 7(b)]. This can be attributed to the presence of phenyl rings in the main chain of PET glycolysates, which lead to the increasing of rigidity of the samples.…”

Section: Microwave-assisted Glycolysismentioning

confidence: 99%

“…The considerably lower viscosity of the PET glycolysates is expected to improve the resin wetting action which can permit higher filler loadings, without compromising the rate of curing and thermal stability. In fact, polyether polyol-based reactive diluents have been employed for improving the resistance of epoxy toward brittle fracture [18][19][20] ; however, PET glycolysates have not been employed for this purpose. Blending of epoxy with aliphatic polyols is generally associated with a reduction in the material stiffness, 18 a feature that can be overcome by the alternate use of PET glycolysates.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, polyether polyol-based reactive diluents have been employed for improving the resistance of epoxy toward brittle fracture [18][19][20] ; however, PET glycolysates have not been employed for this purpose. Blending of epoxy with aliphatic polyols is generally associated with a reduction in the material stiffness, 18 a feature that can be overcome by the alternate use of PET glycolysates. Interestingly, ample literature is available on toughening of epoxy resins derived from DGEBA (diglycidyl ether of bisphenol A), but their cycloaliphatic analogues have received less attention.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Poly(ethyleneterephthalate) glycolysates as effective toughening agents for epoxy resin

Chaudhary

Parthasarathy

Kumar

et al. 2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

The potential of poly(ethyleneterephthalate) glycolysates toward improving the energy absorption characteristics of cycloaliphatic epoxy resins has been explored. Microwave-assisted glycolytic depolymerization of PET was performed in the presence of polyether diols of different molecular weights. The obtained glycolysates were blended with epoxy, and their mechanical properties were studied under both quasi-static and dynamic conditions. Significant improvements were observed, which were found to depend both on the amount as well as nature of glycolysate. Amine functionalities were introduced at the terminal positions of glycolysates to improve the compatibility between the two phases. The amine derivatives exhibited superior performance and the Mode I fracture toughness (K IC ) of epoxy increased by $18% in optimized compositions, which is indicative of its improved notch sensitivity. Neat epoxy specimens fractured in a brittle fashion, but all the blends exhibited ductile failure, as evidenced by surface morphological investigations. The mechanical properties of epoxy blends prepared with analogous aliphatic polyols, both before and after amine functionalization, were also studied which clearly reveal the beneficial role of aromatic groups toward improving the toughness of the base cycloaliphatic epoxy resin without compromising on the material stiffness.

show abstract

Mechanical characterization of epoxy composites modified with reactive polyol diluent and randomly-oriented amino-functionalized MWCNTs

Cited by 56 publications

References 22 publications

Effects of thinner on RTV silicone rubber nanocomposites reinforced with GR and CNTs

Effects of thinner on RTV silicone rubber nanocomposites reinforced with GR and CNTs

Innovative materials of this era for toughening the epoxy matrix: A review

Poly(ethyleneterephthalate) glycolysates as effective toughening agents for epoxy resin

Contact Info

Product

Resources

About