The role of a silane coupling agent in carbon nanotube/polypropylene composites

Xin, Fei; Li, Lin

doi:10.1177/0021998312437235

Cited by 28 publications

(18 citation statements)

References 37 publications

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“…The higher T co and T cp of the PA 6 composites compared to the unfilled PA 6 means that upon cooling, crystallization of PA 6 begins earlier in the composites than in the unfilled PA 6. This is because MCC acts as nucleating agents to induce crystallization of the polymer melt in the cooling process . Table also showed that the composite samples exhibited a lower percentage crystallinity ( X c ) than the neat polymer.…”

Section: Resultsmentioning

confidence: 97%

“…Table also showed that the composite samples exhibited a lower percentage crystallinity ( X c ) than the neat polymer. The reason why the crystallinity of PA 6 in its composites was lower than that of unfilled PA 6 can be explained that the MCC particles provide nucleating sites for crystallization of PA 6 but at the same time the mobility of PA 6 chains is restricted by the MCC particles and MCC particles may also act as barriers affecting crystal growth . The absolute crystallinity as a function of temperature is also illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Polyamide 6–Cellulose Composites: Effect of Cellulose Composition on Melt Rheology and Crystallization Behavior

Kızıltaş

Nazari

Gardner

et al. 2013

Polymer Engineering & Sci

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Melt rheology and crystallization behavior of polyamide 6 (PA 6) and microcrystalline cellulose (MCC) composites were systematically studied in this research. The incorporation of MCC into the PA 6 matrix resulted in higher complex viscosities (|η*|), storage modulus (G′), and shear viscosities than those of neat PA 6, especially at low frequencies. The orientation of rigid molecular chains in the composites introduced by the addition of MCC induced a strong shear thinning behavior with an increase in MCC loading. The non‐isothermal crystallization kinetics of PA 6 and MCC composites were investigated by differential scanning calorimetry. The Avrami and Tobin model were applied to describe the process of non‐isothermal crystallization and to determine the crystallization parameters of the composites. Analysis of the crystallization kinetics indicated that the Avrami (na) and Tobin exponent (nt) was altered by the MCC. It was also found that the Avrami and Tobin equations fit the empirical data well. POLYM. ENG. SCI., 54:739–746, 2014. © 2013 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Polyamide 6–Cellulose Composites: Effect of Cellulose Composition on Melt Rheology and Crystallization Behavior

Kızıltaş

Nazari

Gardner

et al. 2013

Polymer Engineering & Sci

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“…Various polymers including PTFE, PI, PMMA, PS, PPS, AMMA, UHMWP, and PP have been reinforced with the CNTs [7][8][9][10][11][12][13][14][15] and extensive friction and wear performance studies have been performed. Extensive works [16][17][18][19][20][21][22][23][24] have reported the effects of the processing route and parameters on the rheological, thermal, mechanical, and electrical performances of the CNT-PP composites. This work attempts to investigate the tribological performance of the CNT-PP composites developed using the melt compounding technique.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and tribological properties of carbon nanotube reinforced polypropylene composites

Mertens

Senthilvelan

2016

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this work, carbon nanotube (CNT) reinforced polypropylene (PP) composites (0.5, 1.0, 3.0, and 5.0 wt%) were developed using the melt compounding process. The developed composites were injection-molded into tensile specimens and pins to evaluate the mechanical and tribological properties of the composites. As the CNT content increased, the tensile strength and Young's modulus of the PP composites increased. The addition of the CNTs to the PP matrix beyond 1 wt% demonstrated agglomeration, and fractured tensile specimens confirmed this behavior. Developed materials demonstrated enhanced crystallinity up to 1 wt% CNT and, subsequently, decreased crystallinity beyond 1 wt% CNT, and an X-ray diffraction investigation confirmed this behavior. The measured coefficient of friction, online wear, and weight loss from the sliding wear test confirmed the least frictional resistance and maximum wear resistance for the 1 wt% CNT-PP composite. As the CNT content increased, the hardness of the CNT-PP composite increased up to 1 wt% CNT and decreased beyond this threshold. The worn-out surfaces of the CNT-PP composite observed using a scanning electron microscope and noncontact three-dimensional profiler confirmed the superior wear resistance of the 1 wt% CNT-PP composite. The CNT-PP composites considered in this study exhibited increased surface temperatures in the sliding wear condition because of the addition of the CNTs. The addition of the CNTs to the PP material increased the thermal conductivity of the composite.

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“…The nucleating effect contributes significantly to the occurrence of transcrystalline layers around the nanofillers, resulting in an increase in the degree of crystallinity [27]. However, nanofillers also restrict the mobility of polymer molecular chains and act as barriers affecting crystal growth [28]. In the case of CNF as nanofillers, the latter became the predominant factor in affecting the crystallization of Nylon 6.…”

Section: Thermal Properties Of Nanocomposite Filamentsmentioning

confidence: 99%

Fabrication and characterization of Nylon 6/cellulose nanofibrils melt-spun nanocomposite filaments

Zhu

Yadama

Liu

et al. 2017

Composites Part A: Applied Science and Manufacturing

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Nylon 6/cellulose nanofibrils (CNFs) melt-spun nanocomposite filaments were melt spun using a capillary rheometer to explore their capacity as textile materials with potentially improved fabric comfort. The effects of CNF loading level (0-10 wt%) on the morphological structures, mechanical and physical properties of the nanocomposite filaments were evaluated. The nanocomposite filaments have much rougher surfaces and non-uniform diameters compared to neat Nylon 6 filaments. Nanoindentation test on the cross-section of the filaments revealed that there was no significant agglomeration of CNFs. As the CNF loading level was increased, the complex viscosity and storage modulus of the nanocomposite filaments were increased, whereas thermal stability was retained. Tenacity and initial modulus of the nanocomposite filaments were improved due to excellent mechanical properties of CNFs. The incorporation of CNFs also increased the 1

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The role of a silane coupling agent in carbon nanotube/polypropylene composites

Cited by 28 publications

References 37 publications

Polyamide 6–Cellulose Composites: Effect of Cellulose Composition on Melt Rheology and Crystallization Behavior

Polyamide 6–Cellulose Composites: Effect of Cellulose Composition on Melt Rheology and Crystallization Behavior

Mechanical and tribological properties of carbon nanotube reinforced polypropylene composites

Fabrication and characterization of Nylon 6/cellulose nanofibrils melt-spun nanocomposite filaments

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