Uniaxial tensile deformation of microinjection molded PCL/SWCNTs nanocomposites: Effect of interfacial “soft epitaxy” on the structural evolution as studied by synchrotron SAXS and WAXD techniques

Duan, Tianchen; Li, Yiguo; Song, Tao; Yao, Guibin; Jin, Jing; Wang, Zongbao

doi:10.1016/j.polymer.2020.122526

Cited by 8 publications

(4 citation statements)

References 53 publications

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“…7,44 A similar phenomenon was also observed by other research groups. 52,53 In order to reveal the dependence of the orientation of the CNT axes along the stretching direction on the CNT content, we plotted the orientational-order parameters of the CNT axes along the stretching direction as a function of the filler number, as shown in Fig. S4 of the ESI.…”

Section: Resultsmentioning

confidence: 99%

“…In some experimental work, it was also found that CNTs have a stronger ability to orient during the stretching process than polymer chain segments. 44,52 On one hand, the CNT orientation can be attributed to the changes in the depletion force caused by the elongation of polymer chains. 53 On the other hand, the length of one PE bond is about 0.15 nm, which is much shorter than that of one single CNT used in the simulation.…”

Section: Resultsmentioning

confidence: 99%

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Studying the effects of carbon nanotube contents on stretch-induced crystallization behavior of polyethylene/carbon nanotube nanocomposites using molecular dynamics simulations

Yang

Liu

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Studying the effects of carbon nanotube contents on stretch-induced crystallization behavior of polyethylene/carbon nanotube nanocomposites using molecular dynamics simulations

Yang

Liu

et al. 2022

Phys. Chem. Chem. Phys.

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“…The extensional flow is essential for the extension of polymer chains compared with the normal shear flow. [102][103][104] Li et al [103] examined the formation of hybrid crystalline fibrils "shish" without kebabs in PLA/CNT. In addition to shear flow induced inside the extruder barrel, the extensional flow was carried through multistage extrusion of the final extrudate.…”

Section: Homopolymer-based Compositesmentioning

confidence: 99%

A review on the processing–morphology–property relationship in biodegradable polymer composites containing carbon nanotubes and nanofibers

Motloung

Mofokeng

Ojijo

et al. 2021

Polymer Engineering & Sci

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Carbon nanofillers containing biodegradable polymer composites have become an emerging frontier in materials science and engineering because of their potential as environmentally friendly materials in multiple applications, from load-bearing to advanced packaging to biomedical applications. Herein, we present the effect of processing parameters on the final morphology and the resulting properties of the biodegradable polymer composites containing carbon nanotubes (CNTs) or carbon nanofibers (CNFs). Various strategies can be employed to develop such composites; however, the type of morphology, which results during processing, significantly affects the final properties of the obtained composites. Therefore, various processing strategies such as meltblending, additive manufacturing, and electrospinning are critically reviewed, together with the potential applications in load-bearing, tissue engineering, electromagnetic shielding, gas sensing, and packaging. Finally, we discuss the existing challenges and future directions in designing CNTs/CNFs containing biodegradable polymer composites with desired properties.

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“…Zhang and Qiu et al found that thermally reduced graphene could accelerate the isothermal and non-isothermal crystallization kinetics of PCL. Some other fillers, including silicates, ,, carbonaceous particles, ,− polysaccharides, − had also been reported to more or less influence the crystallization of PCL. Besides, some polymers, including polyethylene (PE), − polypropylene (PP), , poly(tetrafluoroethylene), , and poly(ω-pentadecalactone) were also reported to accelerate the crystallization PCL.…”

Section: Introductionmentioning

confidence: 99%

Nucleation Efficiencies of Calcium Hexahydrophthalic Acid for Poly(ε-caprolactone) Crystallization

Sun

Feng

2021

ACS Appl. Polym. Mater.

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Poly(ε-caprolactone) (PCL) has received widespread attention due to its biocompatibility and biodegradability. Introduction of the nucleating agent (NA) is an effective method to control the crystallization behavior of semicrystalline polymer and regulate their properties. Unfortunately, only a few NAs for PCL have been reported up to now. In this work, considering the structure similarity between PCL and polyethylene (PE), we tried to synthesize the calcium hexahydrophthalic acid (Ca-HHPA), the main ingredient of a special NA for PE, by neutralization reaction in deionized water and investigated its possible nucleating effect for PCL. It was interesting to find that the as-synthesized product undergoing different thermal treatments exhibited obviously different nucleation effects. The Ca-HHPA80, obtained by drying at 80 °C for 24 h, only slightly increased the crystallization peak temperature (T c) of PCL by no more than 1.7 °C with the loadings investigated, while Ca-HHPA80-200, obtained by further annealing Ca-HHPA80 at 200 °C for 5 min, could notably increase the T c by 5.2 °C in similar dosages. The results of structural characterization indicated that the Ca-HHPA80 and Ca-HHPA80-200 were crystalline monohydrated and dehydrated carboxylate, respectively. The investigation of structural evolution behavior during the heating process revealed that the monohydrated carboxylate lost its crystal water and gradually transformed to dehydrated one at 140–190 °C accompanied with the conformational transformation of the methylene from gauche to trans conformation, which led to a great variation of their alkyl chain packing in crystal lattice. Based on the epitaxial crystallization theory, the possible reasons for the obviously improved nucleating efficiency of Ca-HHPA80-200 were discussed. The alkyl chain packing of Ca-HHPA80-200 leading to the lower mismatching with the PCL crystals may be accountable for its relatively higher nucleation efficiency.

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Uniaxial tensile deformation of microinjection molded PCL/SWCNTs nanocomposites: Effect of interfacial “soft epitaxy” on the structural evolution as studied by synchrotron SAXS and WAXD techniques

Cited by 8 publications

References 53 publications

Studying the effects of carbon nanotube contents on stretch-induced crystallization behavior of polyethylene/carbon nanotube nanocomposites using molecular dynamics simulations

Studying the effects of carbon nanotube contents on stretch-induced crystallization behavior of polyethylene/carbon nanotube nanocomposites using molecular dynamics simulations

A review on the processing–morphology–property relationship in biodegradable polymer composites containing carbon nanotubes and nanofibers

Nucleation Efficiencies of Calcium Hexahydrophthalic Acid for Poly(ε-caprolactone) Crystallization

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