Highly stable polyimide composite films based on 1,2,4-triazole ring reinforced with multi-walled carbon nanotubes: Study on thermal, mechanical, and morphological properties

Takassi, Mohammad Ali; Zadehnazari, Amin; Farhadi, Asadollah; Mallakpour, Shadpour

doi:10.1016/j.porgcoat.2014.12.001

Cited by 25 publications

(11 citation statements)

References 40 publications

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“…Step polymerization is often applied to prepare CNTs reinforced polymer nanocomposites by in situ polymerization of monomers [43,44]. In the in situ grafting reaction, CNTs first have to graft reactive groups on the side wall, which then react with reactive groups of monomers to form covalent bond.…”

Section: In Situ Polymerizationmentioning

confidence: 99%

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Mechanical Properties of Carbon Nanotubes-Polymer Composites

Dai¹,

Sun²

2016

Carbon Nanotubes - Current Progress of Their Polymer Composites

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Carbon nanotubes CNTs , as a one-dimensional material, have outstanding mechanical properties such as extreme tensile strength and Young s modulus. At present, to prepare pure CNTs materials is quite difficult and the mechanical properties of the materials are limited in a low level. Because of their extraordinary mechanical properties and high aspect ratio, CNTs are considered to be ideal candidates for polymer reinforcement. In addition, CNTs/polymer composite materials are much easier to prepare than pure CNTs materials, so they have been paid much attention by researchers recently. However, challenges must be faced to prepare the CNTs/polymer composite with ultimate mechanical properties. So in this chapter, the main concerns are how to disperse CNTs in polymer matrix to prepare homogenous composite dispersions, how to prepare homogenous CNTs/polymer composite using possible fabricating processes based on the homogenous dispersions, how to increase the fiber mechanical properties especially through the enhancing interaction between polymer and CNTs, controlling the amount of CNTs and enhancing their orientation in the matrix.

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Section: In Situ Polymerizationmentioning

confidence: 99%

“…Diamine and dianhydride were reacted with carboxylated MWCNTs in situ to give a homogeneous MWCNTs/poly(amic acid) mixture and then to give a series of MWCNTs/PI composites after imidization. Tensile tests show the elastic modulus and the yield strength of the composites increase, and the failure strain decreases [44].…”

Section: In Situ Polymerizationmentioning

confidence: 99%

Mechanical Properties of Carbon Nanotubes-Polymer Composites

Dai¹,

Sun²

2016

Carbon Nanotubes - Current Progress of Their Polymer Composites

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“…Aromatic PIs have elevated thermal stability; however, these materials are unsuitable for many industrial applications. Their limited processability is attributed to their characteristic elevated glass transition temperatures ( T g s) and melt temperatures ( T m s) that are near the polymer's decomposition state . These polymeric materials are synthesized using soluble polyamic acids, which are then coated as thin films on a surface, and heated to be imidized and form the final PI.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical characterization of thermoplastic polyimides to improve the chain collaboration via ureidopyrimidone endcaps

Nicholls

Perez

Pellisier

et al. 2019

Polymer Engineering & Sci

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In this report, we explored the effect of incorporating ureidopyrimidone (UPy) linkers in a series of polyimides (PIs) previously studied in our laboratory. The polymers consist of an aromatic diamine monomer with a methylene linker, 4,4′’‐methylenebis (2,6‐dimethylaniline), used to make a robust main chain along with aliphatic polyetherdiamine backbone linkers to decrease rigidity. The polymers were designed to exhibit thermal properties in between those of conventional aromatic PIs and polymers with wholly aliphatic ether diamine links, with an aim to improve the mechanical characteristics. Through dynamic mechanical analysis and differential scanning calorimetry, it is shown that the UPy linkers with their four‐hydrogen bond sites are introduced to connect the chains in series. The connection strengthens the chain interactions and increases the range of the thermal and mechanical properties of the PI. Furthermore, the connecting regions are an important component to preserve the thermal stability of PIs while maintaining the processability. The polymers were characterized by FTIR, nuclear magnetic resonance, GPC, thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, microhardness, and tensile testing. POLYM. ENG. SCI., 59:2231–2246, 2019. © 2019 Society of Plastics Engineers

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“…The elevated energy cost to process these highly stable materials is due to high glass transition and melt temperatures, which range close to their decomposition temperatures . Film coating is a common manufacturing process that involves a slurry of polyamic acid that is cured and imidized.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical characterization of thermoplastic polyimide to improve the chain interaction via crystalline domains

Nicholls

Craft

Perez

et al. 2019

Polymer Engineering & Sci

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In a previous study on polyimides, we incorporated an aromatic diamine monomer with a methylene linker, 4,4 0 -methylenebis (2,6-dimethylaniline), to make a robust main chain along with aliphatic polyetherdiamine backbone linkers to decrease rigidity. In this report, we explore the behavior of crystalline regions provided by the organized packing of polyethylene oxide into the formerly characterized polymers. The polymers were designed to exhibit thermal properties in between those of conventional aromatic polyimides and polymers with wholly aliphatic ether diamine links, with a target to improve the mechanical characteristics. Through dynamic mechanical analysis and differential scanning calorimetry, it is shown that the incorporation of polyethylene oxide diamine and the removal of methyl pending groups serve to improve the organized packing of the chains. All of this allows for a broader range in tenability of thermal and mechanical properties of the polyimide. Furthermore, the crystalline regions are an important component to maintain the temperature stability of polyimide while maintaining the processability. The polymers are characterized by Fouriertransform infrared spectroscopy, thermomechanical and calorimetric analysis, microhardness measurements, tensile testing, and wide-angle X-ray scattering.

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Highly stable polyimide composite films based on 1,2,4-triazole ring reinforced with multi-walled carbon nanotubes: Study on thermal, mechanical, and morphological properties

Cited by 25 publications

References 40 publications

Mechanical Properties of Carbon Nanotubes-Polymer Composites

Mechanical Properties of Carbon Nanotubes-Polymer Composites

Thermomechanical characterization of thermoplastic polyimides to improve the chain collaboration via ureidopyrimidone endcaps

Thermomechanical characterization of thermoplastic polyimide to improve the chain interaction via crystalline domains

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