Unique nucleation of multi-walled carbon nanotube and poly(ethylene 2,6-naphthalate) nanocomposites during non-isothermal crystallization

Kim, Jun Young; Park, Hawe Soo; Kim, Seong Hun

doi:10.1016/j.polymer.2005.12.042

Cited by 144 publications

(77 citation statements)

References 44 publications

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“…Thus, the incorporation of a very small quantity of CNT into PBT can effectively enhance the crystallization of PBT nanocomposites through heterogeneous nucleation. Similar observations have been reported for the CNT/polymer nanocomposites, i.e., the accelerated crystallization by the introduction of CNT through heterogeneous nucleation (Kim et al, 2006a;Kim et al, 2007;Kim et al, 2008;Kim, 2009b;Kim et al, 2009;Kim et al, 2010). Wide-angle X-ray diffraction (WAXD) analysis was conducted on the PBT nanocomposites to investigate the effect of the CNT on the structure of the PBT nanocomposites.…”

Section: Thermal Behaviorsupporting

confidence: 58%

Poly(butylene terephthalate) Nanocomposites Containing Carbon Nanotube

Kim¹

2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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Section: Thermal Behaviorsupporting

confidence: 58%

Poly(butylene terephthalate) Nanocomposites Containing Carbon Nanotube

Kim¹

2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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“…In general, homogeneous nucleation starts spontaneously from the melt and requires more time, whereas heterogeneous nucleation forms as soon as the samples reach the crystallization temperature. 19,20 The fact that f-MWNTs are well dispersed in the PHB matrix leads to an increased number of sites available for the nucleation of PHB spherulites, thereby facilitating the crystallization process. Isothermal melt crystallization kinetics of neat PHB and its two nanocomposites were further studied in a wide range of crystallization temperatures (T c s).…”

Section: Isothermal Melt Crystallization Kinetics Of Neat Phb and Itsmentioning

confidence: 99%

Isothermal Melt Crystallization Kinetics Study of Biodegradable Poly(3-hydroxybutyrate)/Multiwalled Carbon Nanotubes Nanocomposites

Qiu

2009

Polym. J.

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Poly(3-hydroxybutyrate) (PHB) is a truly biodegradable and highly biocompatible polymer; [1][2][3][4][5][6] however, wider application range of PHB has been limited because of its stiffness and brittleness problems. Moreover, its melting temperature is so close to the thermal decomposition temperature that PHB becomes thermally unstable during processing. Therefore, many attempts have been made to improve its mechanical and thermal properties, among which polymer blending is an easy and convenient way of achieving desirable combination of properties. Ha et al. and Di Lorenzo et al. have recently reviewed miscibility, properties and biodegradability of polymer blends containing PHB. 7,8Addition of nano-particles such as carbon nanotubes (CNTs) to form nanocomposites has provided another means to improve materials performances.9,10 CNTs possess unique mechanical, electrical and thermal properties that make it ideal candidates to substitute conventional nano-fillers in the fabrication of polymer nanocomposites. [11][12][13][14][15][16] It is noted that the strong interfacial adhesion between polymer chains and nanotubes is critically important to effectively maximize load transfer from the matrix to CNTs. Recently, PHB/single walled carbon nanotubes (SWCNTs) nanocomposites have been prepared by solution casting method using chloroform as cosolvent. 17 The experimental results showed that the crystalline size substantially decreased for the PHB/SWCNTs nanocomposite with a 1% weight fraction of SWCNTs as compared to that of neat PHB; moreover, the polymer nanocomposite films showed an increase in hardness and Young's modulus with increasing SWCNTs contents. 17To the best of our knowledge, biodegradable PHB/multiwalled carbon nanotubes (MWNTs) nanocomposites have not been reported so far in the literature. We have recently prepared PHB/MWNTs nanocomposites at different MWNTs loadings by solution casting method and studied the effects of the presence of MWNTs and their loadings on the subsequent multiple melting behavior of PHB in the nanocomposites crystallized non-isothermally from the melt. 18 In this note, we further studied the isothermal melt crystallization kinetics of neat PHB and the PHB/MWNTs nanocomposites for a better understanding of the influence of the presence of MWNTs and the loadings on the crystallization behavior of PHB in the PHB/MWNTs nanocomposites.

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“…O fenômeno de cristalização é de grande importância na obtenção de compósitos poliméricos nanoestruturados, especialmente para a análise e operações de processamento. Portanto, o processo de cristalização dos compósitos poliméricos reforçados com CNTs deve ser analisado de modo a entender o potencial deste nanoreforço na aplicação em matrizes termoplásticas [21][22][23] . Estudos anteriores [24,25] tem reportado que os CNTs podem atuar como agentes nucleadores durante o processo de cristalização.…”

Section: Estudo Das Propriedades Elétricas E Térmicas De Compósitos Nunclassified

Estudo das propriedades elétricas e térmicas de compósitos nanoestruturados de poli(sulfeto de fenileno) reforçados com nanotubos de carbono

2015

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ResumoNeste trabalho o comportamento de cristalização e a condutividade elétrica de compósitos nanoestruturados de poli(sulfeto de fenileno) reforçado com nanotubos de carbono de paredes múltiplas obtidos através da técnica de mistura em fusão foram estudados. A incorporação do nanoreforço na matriz polimérica foi responsável por um aumento da cristalinidade devido ao fenômeno de nucleação heterogênea. A condutividade elétrica do PPS apresentou um aumento de 11 ordens de magnitude quando 2,0 m/m% de MWCNT foram adicionados a matriz polimérica. Além disso, o limite de percolação elétrica encontrado para este sistema foi de 1,4 m/m% de MWCNT, revelando a formação de uma rede condutiva tridimensional no interior da matriz polimérica. Palavras-chave: PPS, MWCNT, cristalização, propriedades elétricas, limite de percolação elétrica. AbstractIn this work, the crystallization behavior and electrical conductivity of multiwalled carbon nanotubes reinforced poly (phenylene sulfide) nanostructured composites obtained by melt mixing were investigated. The incorporation of nanofiller in polymeric matrix was responsible for an increase in crystallinity due heterogeneous nucleation phenomenon. The electrical conductivity of PPS showed an increase by 11 orders of magnitude when 2.0 wt% of MWCNT was considered. Moreover, the electrical percolation threshold found on this system was 1.4 wt%, suggesting the formation of three-dimensional conductive network within the polymeric matrix.

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Unique nucleation of multi-walled carbon nanotube and poly(ethylene 2,6-naphthalate) nanocomposites during non-isothermal crystallization

Cited by 144 publications

References 44 publications

Poly(butylene terephthalate) Nanocomposites Containing Carbon Nanotube

Poly(butylene terephthalate) Nanocomposites Containing Carbon Nanotube

Isothermal Melt Crystallization Kinetics Study of Biodegradable Poly(3-hydroxybutyrate)/Multiwalled Carbon Nanotubes Nanocomposites

Estudo das propriedades elétricas e térmicas de compósitos nanoestruturados de poli(sulfeto de fenileno) reforçados com nanotubos de carbono

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