Surface modification of single‐walled carbon nanotubes with polyethylene via <i>in situ</i> Ziegler–Natta polymerization

Tong, Xin; Liu, Chang; Cheng, Hui‐Ming; Zhao, Haichao; Yang, Feng; Zhang, Xuequan

doi:10.1002/app.20306

Cited by 85 publications

(41 citation statements)

References 11 publications

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“…In this work, the surface of the SWNTs was initially functionalized with a catalyst (MgCl 2 /TiCl 4 ), and then ethylene was polymerized, giving PE-grafted SWNTs that were then mixed with commercial PE by melt blending. [71] The "grafting-to" method was used for the preparation of composites with polymers containing reactive functional groups. One of the first examples of the "grafting-to" approach was published by Fu et al in 2001.…”

Section: Functionalization Of Carbon Nanotubes With Polymer Moleculesmentioning

confidence: 99%

Mechanical Reinforcement of Polymers Using Carbon Nanotubes

2006

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Owing to their unique mechanical properties, carbon nanotubes are considered to be ideal candidates for polymer reinforcement. However, a large amount of work must be done in order to realize their full potential. Effective processing of nanotubes and polymers to fabricate new ultra‐strong composite materials is still a great challenge. This Review explores the progress that has already been made in the area of mechanical reinforcement of polymers using carbon nanotubes. First, the mechanical properties of carbon nanotubes and the system requirements to maximize reinforcement are discussed. Then, main methods described in the literature to produce and process polymer–nanotube composites are considered and analyzed. After that, mechanical properties of various nanotube–polymer composites prepared by different techniques are critically analyzed and compared. Finally, remaining problems, the achievements so far, and the research that needs to be done in the future are discussed.

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Section: Functionalization Of Carbon Nanotubes With Polymer Moleculesmentioning

confidence: 99%

Mechanical Reinforcement of Polymers Using Carbon Nanotubes

2006

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“…These properties of CNTs endow themselves with new scientific and technological opportunities as an ideal filler material in composites. To date, various composite materials have been prepared by incorporating SWNTs or MWNTs into a metal matrix [9][10][11][12], a ceramic matrix [13][14][15][16] or a polymer matrix [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Polymers can be easily processed and fabricated into intricately shaped components without damaging CNTs during processing using conventional methods, and hence the manufacturing cost can be certainly reduced.…”

Section: Introductionmentioning

confidence: 99%

“…While for CNT/polymer functional composites, many other interesting properties of CNTs, such as the high electrical and thermal conductivity, are used to develop functional materials possessing heat resistance, chemical sensing, electrical conducting, thermal conducting, photoemission, electromagnetic absorbing or energy storage performances, etc. In recent years, many polymers, such as epoxy [17][18][19], PMMA [20][21][22], PVA [23], PVC [24,25], PP [26][27][28], PE [29,30], PA12 [31], and PS [32,33], have been employed as matrices to prepare CNT/polymer composites. The mechanical properties combining with electrical, thermal, optical and many other properties have been extensively investigated by many research groups for a wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

The present status and key problems of carbon nanotube based polymer composites

Du¹,

Bai²,

Cheng³

2007

Express Polym. Lett.

414

250

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Abstract. The state-of-art and key problems of carbon nanotube (CNT) based polymer composites (CNT/polymer composites) including CNT/polymer structural composites and CNT/polymer functional composites are reviewed. Based on the results reported up to now, CNTs can be an effective reinforcement for polymer matrices, and the tensile strength and elastic modulus of CNT/polymer composites can reach as high as 3600 MPa and 80 GPa, respectively. CNT/polymer composites are also promising functional composite materials with improved electrical and thermal conductivity, etc. Due to their multi-functional properties, CNT/polymer composites are expected to be used as low weight structural materials, optical devices, thermal interface materials, electric components, electromagnetic absorption materials, etc. However, the full potential of CNT/polymer composites still remains to be realized. A few key problems, such as how to prepare structurecontrollable CNTs with high purity and consistently dependable high performance, how to break up entangled or bundled CNTs and then uniformly disperse and align them within a polymer matrix, how to improve the load transfer from matrix to CNT reinforcement, etc, still exist and need to be solved in order to realize the wide applications of these advanced composites.

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“…They managed to enhance impact strength 250% compared with pure PS by adding 0.3!wt% CNTs to the composite, while maintaining the good dispersion of the CNTs. Tong et al [23] coated the CNTs with polyethylene and after melt mixing with matrix polyethylene, the mechanical properties were similar to those of the matrix polymer; without coating the CNTs, poor mechanical properties obtained. In this paper, we demonstrate the benefit of using the in situ polymerized composites as a master-batch.…”

Section: Introductionmentioning

confidence: 99%

Utilization of poly(methyl methacrylate) – carbon nanotube and polystyrene – carbon nanotube in situ polymerized composites as masterbatches for melt mixing

Annala¹,

Lahelin²,

Seppälä³

2012

Express Polym. Lett.

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Abstract. Carbon nanotubes (CNTs) were melt mixed directly or by using an in situ polymerized masterbatch into a matrix polymer, polystyrene (PS) or poly(methyl methacrylate) (PMMA). The mechanical properties of the composites were mostly determined by the amount of CNTs, and not by the use of directly melt mixed CNTs or the use of the masterbatch. In contrast, the electrical resistivity of the composites was dependent on the manner in which the CNTs were added to the matrix polymer. When there was increased interfacial adhesion between the components, as for PS and the CNTs, the use of directly melt mixed CNTs gave better resistivity results. Without strong interactions between the CNTs and the matrix, as with PMMA and CNTs, the use of a tailored masterbatch had a significant effect on properties of the final composites. The molecular weight and viscosity of masterbatches can be varied and when the PMMA-masterbatch had optimized viscosity with respect to the PMMA matrix, electrical resistivity of the final composites decreased noticeably.

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Surface modification of single‐walled carbon nanotubes with polyethylene via in situ Ziegler–Natta polymerization

Cited by 85 publications

References 11 publications

Mechanical Reinforcement of Polymers Using Carbon Nanotubes

Mechanical Reinforcement of Polymers Using Carbon Nanotubes

The present status and key problems of carbon nanotube based polymer composites

Utilization of poly(methyl methacrylate) – carbon nanotube and polystyrene – carbon nanotube in situ polymerized composites as masterbatches for melt mixing

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