Mechanical reinforcement of poly(1‐butene) using polypropylene‐grafted multiwalled carbon nanotubes

Yang, Benhui; Shi, Jiahua; Li, Xu; Pramoda, K.P.; Goh, S. H.

doi:10.1002/app.30056

Cited by 19 publications

(6 citation statements)

References 49 publications

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“…Layered silicates, which are usually preferentially distributed in the amorphous phase within spherulites [40][41][42], were shown to partly mimic this entropic effect by locally increasing the pressure on the nascent crystalline domains [7]. It was observed that large montmorillonite aggregates were desirable in delivering this effect, because small tactoids are too flexible and they are not able to exert pressure on the macromolecular chains [43][44][45]. This is confirmed by our results.…”

Section: Discussionsupporting

confidence: 78%

The effect of a synthetic double layer hydroxide on the rate of II→I phase transformation of poly(1-butene)

Marega¹,

Causin²,

Neppalli³

et al. 2011

Express Polym. Lett.

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Section: Discussionsupporting

confidence: 78%

The effect of a synthetic double layer hydroxide on the rate of II→I phase transformation of poly(1-butene)

Marega¹,

Causin²,

Neppalli³

et al. 2011

Express Polym. Lett.

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“…For instance, the presence of 1.5% CNT in PE will lead to a 40% drop in the fracture toughness of PE. 22 McNally et al showed that the addition of pristine MWNTs to PE matrix caused a significant decrease in fracture toughness. The reason of this effect is related to the weak interfacial interaction between PE and CNT.…”

Section: Introductionmentioning

confidence: 99%

A study on the effect of carbon nanotube surface modification on mechanical and thermal properties of CNT/HDPE nanocomposite

Salehi

Maghmoomi

Sahebian

et al. 2019

Journal of Thermoplastic Composite Materials

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In this article, the effect of carbon nanotube’s (CNT) surface modification on mechanical, thermal, and morphological properties of nanocomposite with different content of CNTs was studied. CNT/high-density polyethylene (HDPE) nanocomposites were prepared by a mini twin-screw extruder. To modify the dispersion of MWCNTs in HDPE, the surface of CNTs was functionalized by HNO3 and stearic acid (SA). The tensile tests results show that addition of 5% of acid-treated CNT in HDPE cause to increase in Young’s modulus and yield strength up to 4% and 6%, respectively; as compared to unmodified CNT/HDPE nanocomposite. The presence of the SA on CNTs can lead to slight decrease of the CNT-SA/HDPE strength properties; when compared to pure CNT/PE nanocomposite. However, there is a fracture toughness enhancement in CNT-SA/HDPE up to 10% compare to unmodified CNT/PE nanocomposite. Furthermore, the calculation of the stress whitening zone of all samples verifies the fracture toughness data of CNT/HDPE nanocomposites. Scanning electron microscopic images showed that the best dispersion of CNTs in the HDPE matrix was seen in CNT-SA/HDPE nanocomposite.

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“…[4] Polymer nanocomposites made with small amounts of monofunctional polymer chains grafted to the nanotubes have been shown to greatly improve the mechanical properties of the composite, [5][6][7] and are more effective than ungrafted pristine nanotubes in this regard. [8] The grafting of polymer chains to nanotubes can be achieved by functionalizing the nanotube in order to introduce reactive groups onto the surface, followed by reaction with a polymer chain possessing a complementary reactive end group. Using a difunctional reactive polymer allows for the possibility of the chain to be grafted at both ends, forming a ''loop''.…”

Section: Introductionmentioning

confidence: 99%

Grafting Polymer Loops onto Functionalized Nanotubes: Monitoring Grafting and Loop Formation

Ashcraft¹,

Ji²,

Mays³

et al. 2011

Macro Chemistry & Physics

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Polystyrene functionalized at both ends (telechelic polymer) with epoxide groups (epoxy–PS–epoxy) was reacted with carboxylated multiwall carbon nanotubes (COOHMWNT) in solution in order to graft polymer chains at both ends onto the MWNT surface, forming loops. FT‐IR spectroscopy was employed to monitor the formation of aromatic esters and to quantify the amount of telechelic grafted to the nanotube surface as a function of reaction time. When the samples were further annealed in the melt, an increase in the aromatic ester peak was observed, indicating that the unreacted chain ends further grafted to MWNT surfaces to form loops. By reacting the grafted nanotube samples further with monocarboxy terminated poly(4‐methylstyrene) (COOHP4MS), the amount of epoxy–PS–epoxy that had only reacted at one end was determined. Reaction rate analysis indicates that that the grafting of epoxy–PS–epoxy to the nanotube surface is reaction controlled, as the FT‐IR spectroscopy signal grows as a function of approximately t0.3. These studies exemplify how FT‐IR spectroscopy can be used as a novel technique to quantify the amount of grafted polymer, grafting rate, and percent of difunctional polymers that form loops, and provide a method to create loop covered nanoparticles. magnified image

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Mechanical reinforcement of poly(1‐butene) using polypropylene‐grafted multiwalled carbon nanotubes

Cited by 19 publications

References 49 publications

The effect of a synthetic double layer hydroxide on the rate of II→I phase transformation of poly(1-butene)

The effect of a synthetic double layer hydroxide on the rate of II→I phase transformation of poly(1-butene)

A study on the effect of carbon nanotube surface modification on mechanical and thermal properties of CNT/HDPE nanocomposite

Grafting Polymer Loops onto Functionalized Nanotubes: Monitoring Grafting and Loop Formation

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